/*
  ==============================================
  DESIGN SYSTEM & SETUP
  ==============================================
*/
:root {
    --font-serif-heading: 'Playfair Display', serif;
    --font-serif-body: 'Crimson Text', serif;
    --ease-in-out-quad: cubic-bezier(0.455, 0.03, 0.515, 0.955);
    --ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1);

    /* Light Theme - Warm Minimalist Palette */
    --bg-primary-light: #f1efe7;
    --bg-secondary-light: #fdfcfa;
    --text-primary-light: #726357;
    --text-secondary-light: #8f7f72;
    --border-light: #d9d5cc;
    --accent-light: #b49d62;
    --accent-glow-light: rgba(180, 157, 98, 0.08);

    /* Dark Theme - Warm Dark Palette */
    --bg-primary-dark: #2a2520;
    --bg-secondary-dark: #3a3530;
    --text-primary-dark: #e8e4dc;
    --text-secondary-dark: #c4bfb5;
    --border-dark: rgba(217, 213, 204, 0.15);
    --accent-dark: #d4b876;
    --accent-glow-dark: rgba(212, 184, 118, 0.12);
}

html[data-theme='dark'] {
    --bg-primary: var(--bg-primary-dark);
    --bg-secondary: var(--bg-secondary-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border: var(--border-dark);
    --accent: var(--accent-dark);
    --accent-glow: var(--accent-glow-dark);
    color-scheme: dark;
}

html[data-theme='light'] {
    --bg-primary: var(--bg-primary-light);
    --bg-secondary: var(--bg-secondary-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --border: var(--border-light);
    --accent: var(--accent-light);
    --accent-glow: var(--accent-glow-light);
    color-scheme: light;
}

/*
  ==============================================
  BASE & RESET
  ==============================================
*/
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.4s var(--ease-out-cubic), color 0.4s var(--ease-out-cubic);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    font-size: 18px;
    line-height: 1.7;
    letter-spacing: 0.01em;
}


/*
  ==============================================
  HEADER & NAVIGATION
  ==============================================
*/
header {
    background: transparent;
    transition: background-color 0.3s var(--ease-out-cubic), border-color 0.3s var(--ease-out-cubic);
    border-bottom: 1px solid transparent;
}

header.scrolled {
    background-color: rgba(5, 7, 17, 0.7);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom-color: var(--border);
}

html[data-theme='light'] header.scrolled {
    background-color: rgba(249, 250, 251, 0.7);
}

.nav-link {
    font-family: var(--font-serif-body);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.3s var(--ease-out-cubic);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

#theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    margin-left: 0.5rem;
    transition: color 0.2s, background-color 0.2s;
}

#theme-toggle:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

html[data-theme='light'] #theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.gradient-text {
    color: var(--accent);
    font-family: var(--font-serif-heading);
    font-weight: 700;
    letter-spacing: 0.02em;
}


/*
  ==============================================
  HERO SECTION
  ==============================================
*/
.hero-image-container {
    position: relative;
}

.hero-image-container img {
    position: relative;
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: transform 0.4s var(--ease-out-cubic), box-shadow 0.4s;
}

.hero-image-container:hover img {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.1);
}

/* Hero Section - Reduce gap and improve layout */
#home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    /* Account for fixed header */
    padding-bottom: 2rem;
}

#home .grid {
    gap: 3rem;
    /* Reduced from default gap-12 (3rem on mobile, but this is more controlled) */
    align-items: center;
}

/* Make hero image larger and more prominent */
.hero-image-container {
    width: 100%;
    max-width: 400px;
    /* Increased from 320px (80 * 4) */
    height: auto;
    aspect-ratio: 1;
    margin: 0 auto;
}

/* On desktop, make it even larger */
@media (min-width: 768px) {
    .hero-image-container {
        max-width: 450px;
        /* Larger on desktop */
    }

    #home .grid {
        gap: 4rem;
        /* Slightly more gap on desktop since we have space */
    }
}

/* Adjust hero text for better balance */
#home h1 {
    font-family: var(--font-serif-heading);
    font-size: 3rem;
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

@media (min-width: 768px) {
    #home h1 {
        font-size: 4rem;
    }
}

/* Tighten up spacing in hero content */
#home .md\:col-span-3 {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#home p.text-lg {
    margin-bottom: 2rem;
    /* Reduced from mb-8 */
}

/*
  ==============================================
  BUTTONS
  ==============================================
*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif-body);
    font-weight: 400;
    font-size: 0.95rem;
    padding: 0.875rem 2rem;
    border-radius: 2px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all 0.3s var(--ease-out-cubic);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-primary);
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
}

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

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--accent);
}

/*
  ==============================================
  SECTION STYLES
  ==============================================
*/
.section-title {
    font-family: var(--font-serif-heading);
    font-size: 2.5rem;
    font-weight: 500;
    position: relative;
    display: inline-block;
    letter-spacing: 0.01em;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 50px;
    height: 1px;
    background: var(--accent);
}

.text-center .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

/*
  ==============================================
  COMPONENTS
  ==============================================
*/
/* Competency Card */
.competency-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    text-align: center;
    transition: transform 0.3s var(--ease-out-cubic), border-color 0.3s, box-shadow 0.3s;
}

.competency-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 4px 12px -4px rgba(0, 0, 0, 0.08);
}

.competency-card i {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.competency-card h4 {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.competency-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Experience Timeline */
.timeline-line {
    position: absolute;
    left: 0.5rem;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 2px;
    background-color: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 0.5rem;
    top: 0.5rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 3px solid var(--accent);
    transform: translateX(-50%);
}

.timeline-content p,
.timeline-content h3 {
    color: var(--text-secondary);
}

.timeline-content h3 {
    color: var(--text-primary);
}

.timeline-content .text-violet-400 {
    color: var(--accent);
}

/* Timeline Break for Career Transition */
.timeline-break {
    position: relative;
    padding-left: 3rem;
    margin: 3rem 0;
}

.timeline-break::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: -2rem;
    height: 2rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--border), transparent);
    transform: translateX(-50%);
}

.timeline-break::after {
    content: '';
    position: absolute;
    left: 0.5rem;
    bottom: -2rem;
    height: 2rem;
    width: 2px;
    background: linear-gradient(to top, var(--border), transparent);
    transform: translateX(-50%);
}

.timeline-break-curve {
    position: absolute;
    left: 0.5rem;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
}

.timeline-break-curve svg {
    width: 100%;
    height: 100%;
}

.timeline-break-content {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(167, 139, 250, 0.05));
    border: 2px solid var(--accent);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px -8px var(--accent-glow);
    position: relative;
}

.timeline-break-content::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0.3;
}

.timeline-break-icon {
    position: absolute;
    left: 0.5rem;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 2.5rem;
    height: 2.5rem;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 20px -5px var(--accent);
    z-index: 5;
}

.timeline-break-icon i {
    color: white;
    font-size: 1.25rem;
}

html[data-theme='light'] .timeline-break-content {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(167, 139, 250, 0.04));
}

/* Category Filter Bar */
.category-filter {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.625rem 1.5rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s var(--ease-out-cubic);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.filter-btn:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 4px 12px -4px var(--accent-glow);
}

.filter-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 0 20px -5px var(--accent);
}

/* Bento Grid Layout */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Featured projects span 2 columns */
    .project-card.featured {
        grid-column: span 2;
    }
}

/* Project Card - Enhanced */
.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.3s var(--ease-out-cubic);
    min-height: 320px;
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.08);
}

.project-card>* {
    position: relative;
    z-index: 10;
}

.project-card .p-6 {
    flex-grow: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

/* Project Card Background Image */
.project-card-bg {
    position: absolute;
    inset: 0;
    border-radius: 16px;
    overflow: hidden;
    z-index: -1;
}

.project-card-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out-cubic);
}

.project-card:hover .project-card-bg img {
    transform: scale(1.1) rotate(1deg);
}

.project-card-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
            transparent 0%,
            rgba(241, 239, 231, 0.6) 40%,
            rgba(241, 239, 231, 0.95) 100%);
    transition: background 0.3s var(--ease-out-cubic);
    z-index: 1;
}

html[data-theme='dark'] .project-card-bg::after {
    background: linear-gradient(to bottom,
            transparent 0%,
            rgba(42, 37, 32, 0.6) 40%,
            rgba(42, 37, 32, 0.95) 100%);
}

.project-card:hover .project-card-bg::after {
    background: linear-gradient(to bottom,
            transparent 0%,
            rgba(241, 239, 231, 0.4) 50%,
            rgba(241, 239, 231, 0.85) 100%);
}

html[data-theme='dark'] .project-card:hover .project-card-bg::after {
    background: linear-gradient(to bottom,
            transparent 0%,
            rgba(42, 37, 32, 0.4) 50%,
            rgba(42, 37, 32, 0.85) 100%);
}

/* Enhanced text visibility on project cards */
.project-card .p-6 {
    text-shadow: none;
}

.project-card h3 {
    font-family: var(--font-serif-heading);
    font-weight: 500;
    font-size: 1.375rem;
    color: var(--text-primary);
    text-shadow: none;
    margin-bottom: 0.75rem;
    transition: color 0.3s;
    letter-spacing: 0.01em;
}

.project-card:hover h3 {
    color: var(--accent);
}

.project-card p {
    font-weight: 400;
    text-shadow: none;
    flex-grow: 1;
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* Tech tags with enhanced styling */
.tech-tag {
    background-color: transparent;
    color: var(--accent);
    font-weight: 400;
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--accent);
    text-shadow: none;
    border-radius: 2px;
    font-size: 0.75rem;
    transition: all 0.3s var(--ease-out-cubic);
    display: inline-block;
}

.tech-tag:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
}

/* Card footer with enhanced visibility */
.card-footer {
    background-color: rgba(5, 7, 17, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-height: 50px;
    gap: 1rem;
}

html[data-theme='light'] .card-footer {
    background-color: rgba(249, 250, 251, 0.85);
}

.social-link {
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: all 0.3s var(--ease-out-cubic);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
}

.social-link:hover {
    color: var(--accent);
    background: var(--accent-glow);
    transform: rotate(15deg) scale(1.1);
}

.publication-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Category tag for filtering */
.category-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent);
    color: var(--bg-primary);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.375rem 0.75rem;
    border-radius: 2px;
    z-index: 20;
    opacity: 1;
    transition: all 0.3s var(--ease-out-cubic);
}

/* Hide/show cards with smooth transitions */
.project-card.hidden {
    display: none;
}

.project-card.filtering-out {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.project-card.filtering-in {
    animation: filterIn 0.5s var(--ease-out-cubic) forwards;
}

@keyframes filterIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* NEW: Publication Item */
.publication-item {
    padding: 1.5rem 0;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem;
    align-items: center;
}

.publication-item:first-child {
    padding-top: 0;
}

.publication-item:last-child {
    padding-bottom: 0;
}

.publication-item h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.publication-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    max-width: 65ch;
}

.publication-item strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* NEW: Contact Card */
.contact-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s var(--ease-out-cubic), border-color 0.3s, box-shadow 0.3s;
    text-decoration: none;
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 4px 12px -4px rgba(0, 0, 0, 0.08);
}

.contact-card i {
    font-size: 1.5rem;
    color: var(--accent);
}

.contact-card div h4 {
    font-weight: 700;
    color: var(--text-primary);
}

.contact-card div p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/*
  ==============================================
  SCROLL ANIMATIONS
  ==============================================
*/
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s var(--ease-out-cubic), transform 0.8s var(--ease-out-cubic);
    transition-delay: var(--delay, 0s);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}