/* ==========================================================================
   DESIGN SYSTEM VARIABLES & THEMES
   ========================================================================== */
:root {
    /* Fonts */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;

    /* Common Tokens */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-full: 9999px;
    --container-max-width: 1200px;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-base: #070a13;
    --bg-surface: rgba(13, 18, 33, 0.75);
    --bg-surface-opaque: #0d1221;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Text */
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Accents */
    --primary: #06b6d4;      /* Electric Cyan */
    --primary-hover: #0891b2;
    --secondary: #3b82f6;    /* Electric Blue */
    --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --accent-glow: rgba(6, 182, 212, 0.15);
    
    /* Category Colors */
    --color-cyan: #22d3ee;
    --color-blue: #60a5fa;
    --color-indigo: #818cf8;
    --color-purple: #c084fc;
    --color-pink: #f472b6;
    --color-yellow: #fbbf24;
}

/* Light Theme */
[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.75);
    --bg-surface-opaque: #ffffff;
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.15);
    
    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    /* Accents */
    --primary: #0284c7;      /* Royal Blue */
    --primary-hover: #0369a1;
    --secondary: #2563eb;    /* Deep Blue */
    --accent-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
    --accent-glow: rgba(2, 132, 199, 0.1);
    
    /* Category Colors */
    --color-cyan: #0891b2;
    --color-blue: #2563eb;
    --color-indigo: #4f46e5;
    --color-purple: #9333ea;
    --color-pink: #db2777;
    --color-yellow: #d97706;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
    position: relative;
    z-index: 2;
}

/* ==========================================================================
   AMBIENT BACKGROUND GLOWS
   ========================================================================== */
.glow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: var(--border-radius-full);
    filter: blur(140px);
    opacity: 0.12;
    transition: opacity var(--transition-slow);
}

[data-theme="light"] .glow-orb {
    opacity: 0.05;
}

.orb-1 {
    top: -10%;
    left: 10%;
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, var(--primary) 0%, transparent 80%);
}

.orb-2 {
    bottom: 10%;
    right: 5%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--secondary) 0%, transparent 80%);
}

.orb-3 {
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    width: 35vw;
    height: 35vw;
    background: radial-gradient(circle, var(--color-purple) 0%, transparent 80%);
}

/* ==========================================================================
   GLASSMORPHISM CARD STYLES
   ========================================================================== */
.glass-card {
    background-color: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.15);
    transition: border-color var(--transition-normal), background-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-hover);
}

/* ==========================================================================
   NAVBAR & HEADER
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(7, 10, 19, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .navbar {
    background-color: rgba(248, 250, 252, 0.6);
}

.nav-container {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.logo-bracket {
    color: var(--primary);
    font-weight: 400;
}

.logo-dot {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-full);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--bg-surface-opaque);
    border-color: var(--border-hover);
    color: var(--primary);
}

.mobile-nav-toggle {
    display: none;
}

/* ==========================================================================
   MOBILE DRAWER
   ========================================================================== */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-surface-opaque);
    z-index: 150;
    padding: 32px 24px;
    box-shadow: -10px 0 30px rgba(0,0,0,0.25);
    display: flex;
    flex-direction: column;
    gap: 40px;
    transition: right var(--transition-normal);
}

.mobile-drawer.open {
    right: 0;
}

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

.drawer-links {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.drawer-link {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.drawer-link:hover {
    color: var(--text-primary);
    border-color: var(--primary);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: var(--border-radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff !important;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(6, 182, 212, 0.4);
}

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

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

.btn-block {
    display: flex;
    width: 100%;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    padding-top: 140px;
    padding-bottom: 60px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 60px;
    align-items: center;
}

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

.hero-image-card {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: var(--border-radius-lg);
    padding: 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px -15px rgba(0,0,0,0.3);
}

.hero-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--border-radius-lg) - 8px);
}

.image-border-glow {
    position: absolute;
    top: -2px;
    left: -2px;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    border-radius: var(--border-radius-lg);
    background: var(--accent-gradient);
    z-index: -1;
    opacity: 0.4;
    transition: opacity var(--transition-normal);
}

.hero-image-card:hover .image-border-glow {
    opacity: 0.8;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--border-radius-full);
    background-color: var(--accent-glow);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.hero-contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--primary);
}

.contact-item:hover {
    color: var(--text-primary);
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.hero-social-links {
    display: flex;
    gap: 16px;
}

.hero-social-links a {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-full);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.hero-social-links a:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

/* ==========================================================================
   STATS SECTION
   ========================================================================== */
.stats-section {
    padding: 40px 0;
}

.grid-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    padding: 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.stat-icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.color-cyan { background-color: rgba(34, 211, 238, 0.1); color: var(--color-cyan); }
.color-blue { background-color: rgba(96, 165, 250, 0.1); color: var(--color-blue); }
.color-indigo { background-color: rgba(129, 140, 248, 0.1); color: var(--color-indigo); }
.color-purple { background-color: rgba(192, 132, 252, 0.1); color: var(--color-purple); }
.color-pink { background-color: rgba(244, 114, 182, 0.1); color: var(--color-pink); }
.color-yellow { background-color: rgba(251, 191, 36, 0.1); color: var(--color-yellow); }

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 56px auto;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: var(--border-radius-full);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   AI & SPECIALTIES
   ========================================================================== */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    height: 100%;
}

.feature-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

.hover-glow {
    position: relative;
}

.hover-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    box-shadow: 0 0 30px rgba(6, 182, 212, 0);
    z-index: -1;
    transition: box-shadow var(--transition-normal);
}

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

.hover-glow:hover::before {
    box-shadow: 0 0 30px var(--accent-glow);
}

/* ==========================================================================
   TECHNICAL SKILLS
   ========================================================================== */
.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: var(--border-radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.2);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    transition: transform var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-normal);
}

.skill-item.hidden {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    padding: 0;
    margin: 0;
    border: none;
}

.skill-item:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.skill-icon {
    font-size: 1.25rem;
    color: var(--primary);
}

.skill-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ==========================================================================
   EXPERIENCE TIMELINE
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--border-color);
    top: 0;
    bottom: 0;
    left: 40px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 90px;
}

.timeline-dot {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: var(--border-radius-full);
    background-color: var(--bg-base);
    border: 4px solid var(--primary);
    left: 31px;
    top: 24px;
    z-index: 5;
    box-shadow: 0 0 10px rgba(6,182,212,0.4);
    transition: background-color var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    background-color: var(--primary);
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-content {
    padding: 24px;
}

.job-role {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.job-company {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.job-location {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.job-location i {
    margin-right: 4px;
}

.job-bullets {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.job-bullets li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 16px;
}

.job-bullets li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.tabs-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.tab-buttons {
    display: flex;
    background-color: var(--bg-surface);
    padding: 6px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.tab-btn {
    padding: 10px 24px;
    border-radius: calc(var(--border-radius-md) - 4px);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--bg-surface-opaque);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

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

.project-card {
    padding: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-info {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-period {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.project-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.project-client {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.project-client i {
    margin-right: 4px;
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tags span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-base);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: auto;
}

.project-link:hover {
    color: var(--primary-hover);
}

/* ==========================================================================
   PUBLICATIONS & EDUCATION
   ========================================================================== */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.pub-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.pub-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    background-color: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.3);
    color: var(--color-indigo);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.pub-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.pub-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.pub-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.pub-stat-item {
    display: flex;
    flex-direction: column;
}

.stat-val {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-lbl {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

.highlight-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--border-radius-full);
    background-color: rgba(251, 191, 36, 0.1);
    border: 1px solid var(--color-yellow);
    color: var(--color-yellow);
    font-size: 0.8rem;
    font-weight: 700;
    margin-top: 12px;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 40px;
}

.contact-info-panel {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
}

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

.panel-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-link-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.link-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: var(--accent-glow);
    border: 1px solid rgba(6, 182, 212, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--primary);
}

.link-detail {
    display: flex;
    flex-direction: column;
}

.link-lbl {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

.link-val {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.panel-cv-block {
    margin-top: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.panel-cv-block h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.panel-cv-block p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.contact-form-panel {
    padding: 32px;
}

.form-group {
    position: relative;
    margin-bottom: 28px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Floating labels */
.form-group label {
    position: absolute;
    left: 16px;
    top: 14px;
    color: var(--text-muted);
    font-size: 0.95rem;
    pointer-events: none;
    transition: transform var(--transition-fast), font-size var(--transition-fast), color var(--transition-fast);
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    transform: translateY(-24px);
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
}

.form-feedback-message {
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    padding: 10px;
    border-radius: var(--border-radius-sm);
    display: none;
}

.form-feedback-message.success {
    display: block;
    background-color: rgba(34, 197, 94, 0.1);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: rgba(7, 10, 19, 0.8);
    padding: 40px 0;
    position: relative;
    z-index: 2;
}

[data-theme="light"] .footer {
    background-color: #f1f5f9;
}

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

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

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

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

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

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   COURSES & VIDEOS (MEDIA SECTION)
   ========================================================================== */
.media-section {
    padding-bottom: 40px;
}

.media-group {
    margin-bottom: 50px;
}

.media-group-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.media-header-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.media-group-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
}

.media-group-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
    border-radius: var(--border-radius-sm);
}

.grid-media-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.grid-media-items.udemy-grid {
    grid-template-columns: repeat(3, 1fr);
}

.media-card {
    overflow: hidden;
    height: 100%;
}

.media-link-wrapper {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.media-cover {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
    background-color: #0b0f19;
}

.media-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.media-card:hover .media-cover img {
    transform: scale(1.05);
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.play-overlay i {
    font-size: 2.2rem;
    color: #ffffff;
    transform: scale(0.8);
    transition: transform var(--transition-fast);
}

.media-card:hover .play-overlay {
    opacity: 1;
}

.media-card:hover .play-overlay i {
    transform: scale(1);
}

.media-content {
    padding: 16px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .media-content {
    background-color: rgba(0, 0, 0, 0.01);
}

.media-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.media-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.media-spacer {
    height: 32px;
}

/* ==========================================================================
   MEDIA QUERIES (RESPONSIVENESS)
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-image-wrapper {
        order: -1;
    }
    
    .hero-contact-info {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-social-links {
        justify-content: center;
    }
    
    .grid-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-projects {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .publications-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-media-items {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-media-items.udemy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-nav-toggle {
        display: flex;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2.4rem;
    }
    
    .grid-cards {
        grid-template-columns: 1fr;
    }
    
    .grid-projects {
        grid-template-columns: 1fr;
    }
    
    .timeline::after {
        left: 20px;
    }
    
    .timeline-dot {
        left: 11px;
    }
    
    .timeline-item {
        padding-left: 50px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .media-group-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .grid-media-items, .grid-media-items.udemy-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .grid-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
}