/* 
 * Zaid Khan - AI/ML Engineer Portfolio 
 * Theme: Professional Minimalist
 */

/* ========================================
   CSS VARIABLES & TOKENS
   ======================================== */

:root {
    /* Color Palette - Dark Mode (Default) */
    --bg-primary: #0F1419;
    --bg-secondary: #1A1F2C;
    --bg-tertiary: #242B3A;

    --text-primary: #F7F8F9;
    --text-secondary: #8B949E;
    --text-muted: #6B737D;

    --accent: #4A90E2;
    --accent-hover: #5DA3F5;
    --accent-glow: rgba(74, 144, 226, 0.2);
    --accent-subtle: rgba(74, 144, 226, 0.08);

    /* Surfaces & Cards */
    --surface: #1A1F2C;
    --surface-hover: #242B3A;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 30px rgba(74, 144, 226, 0.15);

    /* Layout */
    --container-width: 1200px;
    --header-height: 72px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #F1F3F5;

    --text-primary: #1A1F2C;
    --text-secondary: #5C6370;
    --text-muted: #8B949E;

    --accent: #2E7DD1;
    --accent-hover: #4A90E2;
    --accent-glow: rgba(46, 125, 209, 0.15);
    --accent-subtle: rgba(46, 125, 209, 0.06);

    --surface: #FFFFFF;
    --surface-hover: #F8F9FA;
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 30px rgba(46, 125, 209, 0.1);
}

/* ========================================
   RESET & BASE
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 1rem;
    transition: background-color var(--transition-base), color var(--transition-base);
}

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

ul,
ol {
    list-style: none;
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
    font-size: 1.375rem;
}

h4 {
    font-size: 1.125rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #60A5FA 50%, var(--accent) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.text-accent {
    color: var(--accent);
}

.text-muted {
    color: var(--text-muted);
}

/* ========================================
   LAYOUT
   ======================================== */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 48px;
}

.section-header h2 {
    margin-bottom: 12px;
}

.section-header p {
    max-width: 500px;
    margin-bottom: 0;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--accent);
    color: #FFFFFF;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

.btn-secondary:hover {
    background: var(--accent-glow);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
}

.btn-ghost:hover {
    color: var(--accent);
    background: var(--accent-subtle);
}

.btn-icon {
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-icon:hover {
    color: var(--accent);
}

/* ========================================
   NAVBAR
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.9);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--accent-subtle);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.bar {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--accent-subtle);
    border: 1px solid var(--accent);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.hero h1 {
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    max-width: 500px;
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-image img {
    width: 360px;
    height: 420px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 1;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    color: var(--accent);
}

.card h3 {
    margin-bottom: 8px;
}

.card p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* ========================================
   PROJECT CARDS
   ======================================== */

.project-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.project-header {
    height: 140px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}

.project-header svg {
    color: var(--accent);
    opacity: 0.8;
}

.project-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.project-content p {
    font-size: 0.9rem;
    line-height: 1.6;
    flex: 1;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.project-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.7rem;
    padding: 4px 10px;
    background: var(--accent-subtle);
    color: var(--accent);
    border-radius: 100px;
    font-weight: 500;
}

/* ========================================
   EXPERIENCE SECTION
   ======================================== */

.experience-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 32px;
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    box-shadow: var(--shadow-sm);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}

.experience-header h3 {
    font-size: 1.375rem;
}

.experience-badge {
    font-size: 0.8rem;
    padding: 6px 12px;
    background: var(--accent-subtle);
    color: var(--text-secondary);
    border-radius: 100px;
}

.experience-card p {
    margin-bottom: 0;
    line-height: 1.8;
}

/* ========================================
   QUOTE SECTION
   ======================================== */

.quote-section {
    padding: 60px 0;
    background: linear-gradient(90deg, transparent, var(--accent-subtle), transparent);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.quote-section blockquote {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    font-style: italic;
    color: var(--text-primary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   SKILLS PAGE
   ======================================== */

.skill-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.skill-card h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    font-size: 1.2rem;
}

.skill-card h3 svg {
    color: var(--accent);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.skill-item {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.skill-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
   CONTACT PAGE
   ======================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info h3 {
    margin-bottom: 24px;
}

.contact-info-item {
    margin-bottom: 24px;
}

.contact-info-item h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.contact-info-item a {
    font-size: 1.1rem;
    color: var(--accent);
    transition: color var(--transition-fast);
}

.contact-info-item a:hover {
    color: var(--accent-hover);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    padding: 8px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--accent);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
    min-height: 140px;
}

/* ========================================
   EXPANDABLE PROJECT CARDS
   ======================================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.project-card.expanded {
    position: fixed;
    inset: 0;
    margin: auto;
    width: 90%;
    max-width: 700px;
    height: fit-content;
    max-height: 85vh;
    overflow-y: scroll;
    overflow-x: hidden;
    overscroll-behavior: none;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: auto;
    z-index: 1001;
    cursor: default;
    box-shadow: var(--shadow-lg), 0 0 60px rgba(0, 0, 0, 0.4);
    transform: none;
    contain: layout;
}

.project-card.expanded:hover {
    transform: none;
}

.project-header {
    height: 100px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.project-card.expanded .project-header {
    height: 120px;
}

.project-header svg {
    color: var(--accent);
    opacity: 0.8;
}

.project-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.project-summary {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.project-details {
    display: none;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.project-card.expanded .project-details {
    display: block;
    animation: fadeIn 0.3s ease;
}

.project-details h4 {
    font-size: 1rem;
    color: var(--accent);
    margin-top: 16px;
    margin-bottom: 8px;
}

.project-details h4:first-child {
    margin-top: 0;
}

.project-details p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.project-details ul {
    margin-bottom: 16px;
    padding-left: 0;
}

.project-details li {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.project-details li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.project-details li strong {
    color: var(--text-primary);
}

.project-details code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--accent);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.project-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.7rem;
    padding: 4px 10px;
    background: var(--accent-subtle);
    color: var(--accent);
    border-radius: 100px;
    font-weight: 500;
}

.project-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.project-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

.project-card.expanded .project-close {
    display: flex;
}

.project-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1000;
}


.project-overlay.active {
    opacity: 1;
    visibility: visible;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* ========================================
   SKILLS PAGE - NEW DESIGN
   ======================================== */

.skill-section {
    padding: 40px 0;
}

.skill-block {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.skill-block-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.skill-icon-large {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-subtle);
    border-radius: var(--radius-md);
    color: var(--accent);
    flex-shrink: 0;
}

.skill-block-header h2 {
    font-size: 1.5rem;
    margin: 0;
}

.skill-intro {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 800px;
}

.skill-details-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 28px;
}

.skill-detail-item {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.skill-detail-item h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.skill-detail-item p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}

.skill-detail-item a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.skill-detail-item a:hover {
    border-bottom-color: var(--accent);
}

.skill-detail-item code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--accent);
}

.skill-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tech-pill {
    padding: 8px 16px;
    background: var(--accent-subtle);
    color: var(--accent);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--accent);
}

@media (max-width: 1024px) {
    .skill-details-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .skill-block {
        padding: 28px;
    }

    .skill-details-grid {
        grid-template-columns: 1fr;
    }

    .skill-block-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent);
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

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

.animate-in {
    opacity: 0;
    animation: fadeInUp 0.4s ease forwards;
}

.delay-1 {
    animation-delay: 0.05s;
}

.delay-2 {
    animation-delay: 0.1s;
}

.delay-3 {
    animation-delay: 0.15s;
}

.delay-4 {
    animation-delay: 0.2s;
}

.delay-5 {
    animation-delay: 0.25s;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-grid {
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

    .hero-image img {
        width: 280px;
        height: 320px;
    }

    .hero-cta {
        justify-content: center;
    }

    .grid-2,
    .grid-3,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card.expanded {
        width: 95%;
        max-height: 90vh;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 280px;
        max-width: 80%;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 16px;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        border-left: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-image img {
        width: 240px;
        height: 280px;
    }

    .card,
    .skill-card,
    .project-content {
        padding: 20px;
    }

    .experience-card {
        padding: 24px;
    }
}