:root {
    /* ===================================
       Core Color System - Blue Theme
       =================================== */

    /* Primary blue tones (engineering style) */
    --primary-color: #2563eb;      /* main blue */
    --primary-dark: #1d4ed8;       /* darker blue (nav, accents) */
    --primary-light: #60a5fa;      /* lighter blue (glow, hovers) */

    /* Secondary accent (cyan/teal) */
    --secondary-color: #0ea5e9;
    --secondary-dark: #0284c7;

    /* Light theme backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;

    /* Text colors */
    --text-primary: #0f172a;       /* main text */
    --text-secondary: #475569;     /* secondary text */
    --text-muted: #94a3b8;         /* subtle text */
    --text-muted1: #de6f00;        /* light text on dark nav */

    /* Accent colors */
    --accent-green: #22c55e;       /* keep for success tags if needed */
    --accent-blue: #2563eb;
    --accent-purple: #6366f1;
    --accent-orange: #f97316;

    /* Borders & shadows */
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 0 24px rgba(37, 99, 235, 0.35);

    /* Typography */
    --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "Courier New", monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

.form-success {
    background-color: #d4edda;
    color: #155724;
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
    border: 1px solid #c3e6cb;
}

form input, form textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
}

form button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

form button:hover {
    background-color: #0056b3;
}

form button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}


* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

img {
    max-width: 100%;
    display: block;
}

/* ===================================
   Loading Screen - Tight Interlocking Gears
   =================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    text-align: center;
}

.gear-system {
    position: relative;
    width: 160px;
    height: 90px;
    margin: 0 auto 2rem;
}

.gear-system i {
    position: absolute;
    color: var(--primary-color);
    font-size: 3rem; /* Same size for all */
    filter: drop-shadow(0 0 12px rgba(22, 163, 74, 0.5));
}

/* Top center gear */
.gear-1 {
    top: 0;
    left: 50%;
    margin-left: -24px; /* Half of icon width for centering */
    animation: rotate-cw 3s linear infinite;
}

/* Bottom-left gear */
.gear-2 {
    bottom: 5px;
    left: 15px;
    animation: rotate-ccw 3s linear infinite;
}

/* Bottom-right gear */
.gear-3 {
    bottom: 5px;
    right: 15px;
    animation: rotate-cw 3s linear infinite;
}

@keyframes rotate-cw {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes rotate-ccw {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

.loading-text {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.8px;
    margin-top: 0.5rem;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}


/* ===================================
   Navigation - Blue Theme
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.96);          /* deep blue/navy */
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.4);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.7);
    box-shadow: 0 4px 18px rgba(15, 23, 42, 0.55);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo (icon + text) */
.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-muted1); /* white on dark blue bar */
}

/* Logo container in navbar */
.logo-icon {
    width: 40px;     /* adjust: 28 / 32 / 36 */
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;           /* remove gradient so GIF shows clean */
    box-shadow: var(--shadow-sm);
    overflow: hidden;           /* crop anything that overflows */
}

/* GIF inside the logo box */
.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;        /* keep aspect ratio without stretching */
    display: block;
}

}

.logo-text {
    color: var(--text-muted1); /* “Hayl Khadhami” */
}

.logo-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted1);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-family: var(--font-mono);
    transition: var(--transition-normal);
}

.logo:hover .logo-subtitle,
.logo:hover .logo-text {
    color: var(--primary-light);
}

/* Desktop nav menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* Menu items */
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-muted1);      /* light text on dark bar */
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    position: relative;
}

.nav-link i {
    font-size: 1rem;
    opacity: 0.85;
    transition: var(--transition-fast);
    color: var(--text-muted1);
}

.nav-link:hover {
    color: var(--primary-light);
    background: rgba(37, 99, 235, 0.18);
}

.nav-link:hover i {
    opacity: 1;
    transform: translateY(-2px);
    color: var(--primary-light);
}

.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--primary-color);
}

/* Hamburger (mobile) */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-muted1); /* white lines */
    transition: var(--transition-normal);
}

/* Mobile nav menu (drawer) */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #0b1120;  /* dark slate / blue */
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
        overflow-y: auto;
        z-index: 999;
        border-left: 1px solid rgba(15, 23, 42, 0.6);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 1rem;
        justify-content: flex-start;
        border-bottom: 1px solid rgba(15, 23, 42, 0.4);
    }

    .nav-link.active::after {
        display: none;
    }
}


/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.circuit-pattern {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(90deg, 
            rgba(22, 163, 74, 0.03) 0px, 
            transparent 1px, 
            transparent 40px),
        repeating-linear-gradient(0deg, 
            rgba(22, 163, 74, 0.03) 0px, 
            transparent 1px, 
            transparent 40px);
    animation: circuitMove 20s linear infinite;
}

@keyframes circuitMove {
    from { background-position: 0 0; }
    to { background-position: 40px 40px; }
}

.grid-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 20%, 
        rgba(22, 163, 74, 0.15) 0%, 
        transparent 50%),
        radial-gradient(circle at 70% 80%, 
        rgba(14, 165, 233, 0.15) 0%, 
        transparent 50%);
}

.hero-content {
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
    z-index: 1;
}

.greeting {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.wave {
    display: inline-block;
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    10%, 30% { transform: rotate(14deg); }
    20% { transform: rotate(-8deg); }
    40% { transform: rotate(0deg); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.typing-container {
    margin-bottom: 1.5rem;
}

.subtitle {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
    font-family: var(--font-mono);
}

.cursor {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px rgba(22, 163, 74, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(22, 163, 74, 0.5);
}

.btn-primary i {
    transition: var(--transition-fast);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(22, 163, 74, 0.1);
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

/* Hero Image */
.hero-image {
    position: relative;
}

.image-container {
    position: relative;
}

.image-frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
}

.frame-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 3px solid var(--primary-color);
}

.frame-corner.tl {
    top: -10px;
    left: -10px;
    border-right: none;
    border-bottom: none;
}

.frame-corner.tr {
    top: -10px;
    right: -10px;
    border-left: none;
    border-bottom: none;
}

.frame-corner.bl {
    bottom: -10px;
    left: -10px;
    border-right: none;
    border-top: none;
}

.frame-corner.br {
    bottom: -10px;
    right: -10px;
    border-left: none;
    border-top: none;
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 0.9rem;
    font-weight: 500;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.card-1 {
    top: 10%;
    right: -20px;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    left: -30px;
    animation-delay: 1s;
}

.card-3 {
    top: 70%;
    right: -10px;
    animation-delay: 2s;
}
/* Additional Floating Cards */
.card-4 {
    top: 25%;
    left: -25px;
    animation-delay: 0.5s;
}

.card-5 {
    top: 40%;
    right: -35px;
    animation-delay: 1.5s;
}

.card-6 {
    top: 85%;
    left: -15px;
    animation-delay: 2.5s;
}


@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.7;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 3px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes scroll-wheel {
    0% { top: 8px; opacity: 1; }
    100% { top: 24px; opacity: 0; }
}

.arrow {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.arrow span {
    width: 10px;
    height: 10px;
    border-bottom: 2px solid var(--text-secondary);
    border-right: 2px solid var(--text-secondary);
    transform: rotate(45deg);
    animation: arrow-bounce 2s ease-in-out infinite;
}

.arrow span:nth-child(2) {
    animation-delay: 0.2s;
}

@keyframes arrow-bounce {
    0%, 100% { opacity: 0; transform: rotate(45deg) translateY(-10px); }
    50% { opacity: 1; transform: rotate(45deg) translateY(0); }
}

/* ===================================
   Section Common Styles
   =================================== */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text .lead {
    font-size: 1.3rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.quick-facts {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.fact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.fact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.fact-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.fact-item span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
}

.stat-icon i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===================================
   Expertise Section
   =================================== */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.expertise-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.expertise-card:hover::before {
    transform: scaleX(1);
}

.expertise-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    transition: var(--transition-normal);
}

.expertise-card:hover .card-icon {
    background: var(--primary-color);
}

.card-icon i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.expertise-card:hover .card-icon i {
    color: white;
    transform: scale(1.1);
}

.expertise-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.expertise-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

.card-tags li {
    padding: 0.4rem 0.8rem;
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-intro {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.info-cards {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.info-card {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.info-card:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
}

.info-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.info-icon i {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.info-details h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-details a,
.info-details p {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.info-details a:hover {
    color: var(--primary-color);
}

.quote-section {
    padding: 2rem;
    background: var(--bg-card);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
}

.quote-section blockquote {
    position: relative;
}

.quote-section .fa-quote-left {
    font-size: 2rem;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.quote-section p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.quote-section footer {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-full {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.footer-logo p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 8px;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

/* ===================================
   Animation Classes (AOS Alternative)
   =================================== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos="fade-down"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}
/* ===================================
   Page Header (All Inner Pages)
   =================================== */
.page-header {
    position: relative;
    padding: 10rem 0 6rem;
    margin-top: 70px;
    overflow: hidden;
}

.page-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.page-header-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary-light);
}

/* ===================================
   Timeline (Experience Page)
   =================================== */
.experience-section,
.education-section,
.services-section {
    padding: var(--spacing-xl) 0;
}

.experience-section {
    background: var(--bg-primary);
}

.education-section {
    background: var(--bg-secondary);
}

.services-section {
    background: var(--bg-primary);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
}

.timeline-marker {
    position: absolute;
    left: 0;
    width: 60px;
    height: 60px;
    background: var(--bg-card);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
}

.timeline-marker i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.timeline-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.timeline-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.company {
    color: var(--primary-color);
    font-weight: 500;
}

.timeline-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    white-space: nowrap;
}

.timeline-date i {
    color: var(--primary-color);
}

.timeline-body p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* Timeline project images */
.timeline-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-md);
    background: #0b1120; /* fallback while image loads */
}

.timeline-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;          /* crop nicely on desktop */
    display: block;
    transition: transform 0.5s ease, opacity 0.5s ease;
}

/* Blue overlay + label */
.timeline-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 23, 42, 0.15),
        rgba(37, 99, 235, 0.45)
    );
    opacity: 0;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 0.75rem 1rem;
    transition: opacity 0.3s ease;
}

.timeline-image-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: #e5e7eb;
    background: rgba(15, 23, 42, 0.7);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-image-label i {
    font-size: 0.75rem;
}

/* Hover effect (desktop) */
.timeline-item:hover .timeline-image img {
    transform: scale(1.08);
}

.timeline-item:hover .timeline-image-overlay {
    opacity: 1;
}

/* Mobile tweaks */
@media (max-width: 768px) {
    .timeline-image img {
        height: 200px;
        object-fit: cover;
    }

    .timeline-image-overlay {
        opacity: 0.9;           /* more visible on small screens */
    }
}


.experience-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.experience-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.experience-list i {
    color: var(--primary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.4rem 1rem;
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===================================
   Education Cards
   =================================== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.education-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.education-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.education-icon {
    width: 70px;
    height: 70px;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.education-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.degree-date {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.degree-date i {
    color: var(--primary-color);
}

.education-card h3 {
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.education-card h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.university {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.education-details p {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.education-details ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.education-details li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;

/* ===================================
   Projects Page Styles
   =================================== */
.project-filters {
    background: var(--bg-primary);
    padding: 2rem 0;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-normal);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.projects-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(22, 163, 74, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    width: 50px;
    height: 50px;
    background: white;
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.1) rotate(5deg);
}

.project-content {
    padding: 2rem;
}

.project-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-content h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tech span {
    padding: 0.3rem 0.75rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.project-stats {
    display: flex;
    gap: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.project-stats .stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.project-stats .stat i {
    color: var(--primary-color);
}

/* CTA Section */
.cta-section {
    background: var(--bg-primary);
    padding: var(--spacing-xl) 0;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.cta-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

/* ===================================
   Publications Page Styles
   =================================== */
.research-stats {
    background: var(--bg-primary);
    padding: 3rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-box {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.stat-box:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.stat-box .stat-icon {
    width: 60px;
    height: 60px;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-box .stat-icon i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Publications */
.publications-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
}

.publication-card {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 3rem;
    position: relative;
    transition: var(--transition-normal);
}

.publication-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.publication-card.featured {
    border-width: 2px;
    border-color: var(--primary-color);
}

.publication-badge {
    position: absolute;
    top: 2rem;
    right: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.publication-badge.under-review {
    background: var(--secondary-color);
}

.publication-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.publication-type {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.publication-type i {
    color: var(--primary-color);
}

.publication-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-mono);
}

.publication-title {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.publication-authors {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.publication-authors i {
    color: var(--primary-color);
}

.publication-authors span {
    color: var(--text-secondary);
    font-size: 1rem;
}

.publication-abstract {
    margin-bottom: 2rem;
}

.publication-abstract p {
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: justify;
}

.publication-meta {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
}

.meta-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.meta-item:last-child {
    margin-bottom: 0;
}

.meta-item i {
    color: var(--primary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.meta-item span {
    color: var(--text-secondary);
}

.publication-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.pub-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition-normal);
}

.pub-btn.btn-primary {
    background: var(--primary-color);
    color: white;
}

.pub-btn.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.pub-btn.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.pub-btn.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.publication-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.topic {
    padding: 0.5rem 1rem;
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Research Interests */
.research-interests {
    background: var(--bg-primary);
    padding: var(--spacing-xl) 0;
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.interest-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-normal);
}

.interest-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.interest-icon {
    width: 80px;
    height: 80px;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: var(--transition-normal);
}

.interest-card:hover .interest-icon {
    background: var(--primary-color);
    transform: scale(1.1);
}

.interest-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.interest-card:hover .interest-icon i {
    color: white;
}

.interest-card h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.interest-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Collaboration Section */
.collaboration-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
}

.collaboration-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.collaboration-icon {
    width: 100px;
    height: 100px;
    background: rgba(22, 163, 74, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.collaboration-icon i {
    font-size: 3rem;
    color: var(--primary-color);
}

.collaboration-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.collaboration-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.collaboration-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
/* ===================================
   Skills Page Specific Styles
   =================================== */
.skill-level-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.skill-level-badge.expert {
    background: rgba(22, 163, 74, 0.15);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.skill-level-badge.advanced {
    background: rgba(59, 130, 246, 0.15);
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

.skill-level-badge.intermediate {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-orange);
    border: 1px solid var(--accent-orange);
}
/* ===================================
   Projects & Publications Page Styles
   =================================== */

/* Project Category Badge */
.project-category {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.project-category i {
    color: var(--primary-color);
}

/* Project Links */
.project-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(22, 163, 74, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

.project-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Publication Item Styles */
.publication-item {
    position: relative;
}

.publication-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.publication-status.published {
    background: rgba(22, 163, 74, 0.15);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.publication-status.under-review {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-orange);
    border: 1px solid var(--accent-orange);
}

.publication-authors {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.publication-authors i {
    color: var(--primary-color);
}

.publication-details {
    background: rgba(22, 163, 74, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
    margin: 1.5rem 0;
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.detail-item:last-child {
    margin-bottom: 0;
}

.detail-item i {
    color: var(--primary-color);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.publication-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn-small {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
}

.btn-small:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-small:disabled:hover {
    transform: none;
}

/* Research Interests Grid */
.research-interests-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.interest-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-normal);
}

.interest-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.interest-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(22, 163, 74, 0.1);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.interest-card:hover .interest-icon {
    background: var(--primary-color);
    transform: scale(1.1);
}

.interest-icon i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.interest-card:hover .interest-icon i {
    color: white;
}

.interest-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.interest-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Responsive adjustments for projects/publications */
@media (max-width: 1024px) {
    .research-interests-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .research-interests-grid {
        grid-template-columns: 1fr;
    }
    
    .publication-actions,
    .project-links {
        flex-direction: column;
    }
    
    .project-link,
    .btn-small {
        width: 100%;
        justify-content: center;
    }
}