/* ============================================
   SELVI DWI RAHAYU - PORTFOLIO CSS
   Tema: Modern Corporate Department
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #1a56db;
    --primary-dark: #1243b0;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --bg-section: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; }
input, textarea, button { font-family: inherit; outline: none; border: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
    position: relative;
}

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

/* ---------- Section Header ---------- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 50px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
    margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(26, 86, 219, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
}

.logo-text {
    color: var(--text-dark);
}

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

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 10px 18px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
}

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

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

.hamburger .bar {
    width: 26px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active .bar:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.hamburger.active .bar:nth-child(2) { opacity: 0; }
.hamburger.active .bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 50%, #f0f4ff 100%);
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    right: -150px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    bottom: -50px;
    left: -100px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--primary-light);
    top: 50%;
    left: 10%;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.1); }
}

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

.hero-badge {
    display: inline-block;
    background: rgba(26, 86, 219, 0.1);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 50px;
    margin-bottom: 24px;
    border: 1px solid rgba(26, 86, 219, 0.2);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px;
    min-height: 32px;
}

.hero-subtitle .typing-text::after {
    content: '|';
    animation: blink 0.7s infinite;
}

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

.hero-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 540px;
}

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

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

.hero-social .social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.hero-social .social-link:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 86, 219, 0.3);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-img-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
}

.hero-img-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    opacity: 0.1;
    animation: morphing 8s ease-in-out infinite;
}

@keyframes morphing {
    0%, 100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
    50% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
}

.hero-img-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-bg), #dbeafe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--primary);
    border: 4px solid rgba(26, 86, 219, 0.15);
    position: relative;
    z-index: 1;
}

.floating-card {
    position: absolute;
    background: var(--bg-white);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

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

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

.card-2 {
    bottom: 40px;
    left: -30px;
    animation-delay: 2s;
}

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

.about-content {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.about-img-wrapper {
    position: relative;
    display: inline-block;
}

.about-img-placeholder {
    width: 350px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-bg), #dbeafe);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10rem;
    color: var(--primary);
    border: 4px solid rgba(26, 86, 219, 0.1);
}

.about-experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.exp-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1;
}

.exp-text {
    font-size: 0.8rem;
    opacity: 0.9;
}

.about-text h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.about-role {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 16px;
    padding: 4px 16px;
    background: var(--primary-bg);
    border-radius: 50px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 28px 0;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.info-item i {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: var(--primary-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1rem;
}

.info-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

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

/* ---------- Experience Section ---------- */
.experience {
    background: var(--bg-section);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--primary-light));
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-left: 70px;
    margin-bottom: 40px;
}

.timeline-dot {
    position: absolute;
    left: 15px;
    top: 6px;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    border: 4px solid var(--bg-white);
    box-shadow: 0 0 0 3px var(--primary);
    z-index: 1;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-content {
    background: var(--bg-white);
    padding: 28px 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.timeline-header {
    margin-bottom: 14px;
}

.timeline-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.timeline-header .company {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500;
}

.timeline-duties {
    padding-left: 20px;
}

.timeline-duties li {
    position: relative;
    padding: 4px 0;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.timeline-duties li::before {
    content: 'â–¸';
    position: absolute;
    left: -20px;
    color: var(--primary);
    font-weight: bold;
}

/* ---------- Education Section ---------- */
.education {
    background: var(--bg-white);
}

.edu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.edu-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.edu-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.edu-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

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

.edu-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.edu-year {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    padding: 4px 14px;
    background: var(--primary-bg);
    border-radius: 50px;
    display: inline-block;
    margin-bottom: 12px;
}

.edu-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.edu-institution {
    display: block;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.edu-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.edu-achievements {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-achievements span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    padding: 4px 12px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 50px;
}

.edu-achievements span i {
    font-size: 0.75rem;
}

/* ---------- Skills Section ---------- */
.skills {
    background: var(--bg-section);
}

.skills-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.skills-category h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.skills-category h3 i {
    color: var(--primary);
}

.skill-bars {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.skill-item .skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.92rem;
    font-weight: 500;
}

.skill-percent {
    color: var(--primary);
    font-weight: 700;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    transition: width 1.5s ease;
    position: relative;
}

.progress::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: rgba(255,255,255,0.4);
    border-radius: 50%;
}

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

.skill-tag {
    padding: 10px 20px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
    cursor: default;
}

.skill-tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
}

/* Language */
.lang-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.lang-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.lang-name {
    min-width: 140px;
    font-weight: 600;
    font-size: 0.95rem;
}

.lang-level {
    display: flex;
    gap: 4px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    transition: var(--transition);
}

.dot.active {
    background: var(--primary);
}

.lang-label {
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ---------- Portfolio Section ---------- */
.portfolio {
    background: var(--bg-white);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-light);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.filter-btn:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

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

.portfolio-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.portfolio-img {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-bg), #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.portfolio-icon {
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.5;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-icon {
    transform: scale(1.2);
    opacity: 0.8;
}

.portfolio-img::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.05), transparent);
}

.portfolio-info {
    padding: 24px;
}

.portfolio-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    padding: 4px 12px;
    background: var(--primary-bg);
    border-radius: 50px;
    margin-bottom: 12px;
}

.portfolio-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.portfolio-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.portfolio-link i {
    transition: var(--transition);
    font-size: 0.8rem;
}

.portfolio-link:hover i {
    transform: translateX(4px);
}

/* ---------- Stats Section ---------- */
.stats {
    background: linear-gradient(135deg, var(--secondary), #1e293b);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item i {
    font-size: 2.5rem;
    color: var(--primary-light);
    margin-bottom: 16px;
}

.stat-number {
    display: block;
    font-size: 2.8rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    font-weight: 500;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item i {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
}

.contact-item span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    margin-bottom: 2px;
}

.contact-item p {
    font-weight: 600;
    color: var(--text-dark);
}

.contact-form {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--bg-light);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.1);
    background: var(--bg-white);
}

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

.btn-submit {
    width: 100%;
    justify-content: center;
    font-size: 1rem;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--bg-dark);
    color: #fff;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-text {
    color: #fff;
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-top: 16px;
}

.footer-links h4,
.footer-social h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-social .social-links {
    display: flex;
    gap: 10px;
}

.footer-social .social-link {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
    transition: var(--transition);
}

.footer-social .social-link:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(26, 86, 219, 0.4);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--primary-light), var(--primary));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.6rem; }
    .edu-grid { grid-template-columns: repeat(2, 1fr); }
    .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    section { padding: 70px 0; }
    .section-title { font-size: 1.8rem; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        padding: 80px 30px 30px;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 100;
    }

    .nav-menu.active { right: 0; }
    .hamburger { display: flex; z-index: 200; }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-title { font-size: 2.2rem; }
    .hero-desc { margin: 0 auto 32px; }
    .hero-buttons { justify-content: center; }
    .hero-social { justify-content: center; }
    .hero-img-wrapper { width: 280px; height: 280px; }
    .hero-img-placeholder { font-size: 5rem; }
    .floating-card { display: none; }

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

    .about-img-wrapper { margin: 0 auto; }
    .about-img-placeholder { width: 280px; height: 320px; font-size: 7rem; }
    .about-info-grid { grid-template-columns: 1fr; }

    .timeline::before { left: 18px; }
    .timeline-item { padding-left: 50px; }
    .timeline-dot { left: 10px; width: 16px; height: 16px; }

    .edu-grid { grid-template-columns: 1fr; }
    .skills-content { grid-template-columns: 1fr; gap: 30px; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .contact-content { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 24px; }
    .footer-content { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-img-wrapper { width: 220px; height: 220px; }
    .hero-img-placeholder { font-size: 4rem; }
    .about-img-placeholder { width: 220px; height: 260px; font-size: 5rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .stat-number { font-size: 2rem; }
}