/* ==========================================================================
   Design System & CSS Variables (Theme Support)
   ========================================================================== */
:root {
    /* Color Palette - Dark Mode (Default) */
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(31, 41, 55, 0.85);
    --bg-glass: rgba(15, 23, 42, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.4);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #818cf8;

    /* Accent & Brand Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --accent-gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);

    --success: #10b981;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --card-shadow-hover: 0 20px 40px -15px rgba(99, 102, 241, 0.25);

    /* Layout & Spacing */
    --container-width: 1140px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(241, 245, 249, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.75);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.4);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-accent: #4f46e5;

    --accent-primary: #4f46e5;
    --accent-secondary: #7c3aed;
    --accent-gradient-subtle: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);

    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 20px 40px -15px rgba(99, 102, 241, 0.15);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Background Ambient Glows */
.bg-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 {
    top: -100px;
    left: -100px;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

.bg-glow-2 {
    bottom: 10%;
    right: -100px;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
}

[data-theme="light"] .bg-glow {
    opacity: 0.1;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--card-shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-bracket {
    color: var(--accent-primary);
}

.logo-slash {
    color: var(--accent-secondary);
}

.logo-text {
    margin: 0 2px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: rotate(15deg);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

.menu-toggle-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.menu-toggle-btn .close-icon {
    display: none;
}

/* ==========================================================================
   Typography & Reusable Components
   ========================================================================== */
.section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-primary);
    background: var(--accent-gradient-subtle);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-highlight);
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.title-underline {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    margin: 16px auto 0;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ==========================================================================
   1. Hero Section
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 120px;
    padding-bottom: 60px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.2); }
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.name-highlight {
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

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

.cursor {
    display: inline-block;
    width: 2px;
    background-color: var(--accent-primary);
    animation: blink 0.9s infinite;
}

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

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 36px;
}

.social-links {
    display: flex;
    gap: 14px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
}

/* Profile Card / Visual */
.profile-card-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.profile-card {
    position: relative;
    width: 320px;
    padding: 24px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: transform var(--transition-normal);
}

.profile-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--card-shadow-hover);
}

.profile-avatar {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 3px solid transparent;
    background-image: var(--accent-gradient);
    background-origin: border-box;
    background-clip: content-box, border-box;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 4px;
}

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

.profile-floating-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    animation: float 4s ease-in-out infinite;
}

.profile-floating-badge i {
    color: var(--accent-primary);
    width: 18px;
    height: 18px;
}

.badge-top-right {
    top: 20px;
    right: -25px;
    animation-delay: 0s;
}

.badge-bottom-left {
    bottom: 20px;
    left: -25px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.scroll-down-btn {
    align-self: center;
    margin-top: 40px;
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
    animation: bounce 2s infinite;
}

.scroll-down-btn:hover {
    color: var(--accent-primary);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* ==========================================================================
   2. About Me Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
}

.about-subtitle {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.about-paragraph {
    color: var(--text-secondary);
    font-size: 1.025rem;
    margin-bottom: 18px;
    line-height: 1.75;
}

.personal-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.info-label i {
    width: 16px;
    height: 16px;
    color: var(--accent-primary);
}

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

.about-features-col {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-card {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--border-highlight);
    background: var(--bg-card-hover);
    transform: translateX(6px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent-gradient-subtle);
    border: 1px solid var(--border-highlight);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.feature-content p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   3. Skills Section
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.skill-category-card {
    padding: 28px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
}

.skill-category-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.category-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--accent-gradient-subtle);
    border: 1px solid var(--border-highlight);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.category-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

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

.skill-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.skill-badge i {
    width: 14px;
    height: 14px;
    color: var(--accent-primary);
}

.skill-badge:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

/* ==========================================================================
   4. Projects Section
   ========================================================================== */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    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(99, 102, 241, 0.3);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

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

.project-img-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.06);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(11, 15, 25, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.btn-detail-view {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #ffffff;
    color: #0f172a;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.88rem;
    font-weight: 700;
    transition: transform var(--transition-fast);
}

.btn-detail-view:hover {
    transform: scale(1.05);
}

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

.project-category-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
    flex-grow: 1;
}

.project-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

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

.project-links {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.link-btn.primary-link {
    color: var(--accent-primary);
}

.link-btn.primary-link:hover {
    color: var(--accent-secondary);
}

/* ==========================================================================
   5. Experience & Timeline Section
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 55px;
    margin-bottom: 40px;
}

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

.timeline-dot {
    position: absolute;
    left: 13px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-date {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-primary);
    background: var(--accent-gradient-subtle);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.timeline-content {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--border-highlight);
    transform: translateX(4px);
}

.timeline-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-company {
    display: inline-block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.timeline-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
}

.timeline-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-badges span {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
}

/* ==========================================================================
   6. Contact Section
   ========================================================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
}

.contact-info-card,
.contact-form-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--card-shadow);
}

.contact-info-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.contact-subtext {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 28px;
    line-height: 1.6;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.contact-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: var(--accent-gradient-subtle);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

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

.copy-btn {
    padding: 8px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    color: var(--accent-primary);
    background: var(--bg-card-hover);
}

.contact-socials h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

/* Contact Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.required {
    color: #ef4444;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.copyright {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

/* Back To Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 99;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

/* ==========================================================================
   Modal Dialog
   ========================================================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 680px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
    z-index: 10;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    z-index: 20;
}

.modal-close:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.modal-body {
    padding: 32px;
}

.modal-img {
    width: 100%;
    height: 260px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 24px;
}

.modal-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-title {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.modal-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.modal-section-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.modal-feature-list {
    margin-bottom: 24px;
    padding-left: 20px;
    list-style: disc;
    color: var(--text-secondary);
}

.modal-feature-list li {
    margin-bottom: 6px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    z-index: 3000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-icon {
    color: var(--success);
    width: 20px;
    height: 20px;
}

.toast-message {
    font-size: 0.92rem;
    font-weight: 600;
}

/* ==========================================================================
   Responsive Design & Media Queries
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .social-links {
        justify-content: center;
    }

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

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

    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 70px 0;
    }

    .menu-toggle-btn {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        padding: 24px;
        transform: translateY(-150%);
        transition: transform var(--transition-normal);
        box-shadow: var(--card-shadow);
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }

    .menu-toggle-btn.open .open-icon {
        display: none;
    }

    .menu-toggle-btn.open .close-icon {
        display: block;
    }

    .hero-title {
        font-size: 2.1rem;
    }

    .personal-info-grid {
        grid-template-columns: 1fr;
    }

    .profile-floating-badge {
        display: none;
    }
}