/* ======================================================
   SK Portfolio – Complete Self-Contained Stylesheet
   Dark Theme | Premium | No CDN Dependencies
   ====================================================== */

/* ---- Variables ---- */
:root {
    --primary: #6366f1;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --dark: #0f172a;
    --darker: #020617;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.10);
    --text: #f1f5f9;
    --muted: #94a3b8;
    --faint: #64748b;
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow: 0 15px 40px rgba(99, 102, 241, 0.25);
    --transition: 0.3s ease;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 50%, #1e1b4b 100%);
    min-height: 100vh;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, #4f46e5, #7c3aed);
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(32px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes floatY {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-12px);
    }
}

@keyframes pulseGlow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
    }

    50% {
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.8);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.85);
        opacity: 0;
    }

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

@keyframes borderRotate {
    0% {
        background-position: 0% 50%;
    }

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

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

@keyframes typing {
    from {
        width: 0;
    }

    to {
        width: 100%;
    }
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger delays */
.delay-1 {
    transition-delay: 0.10s;
}

.delay-2 {
    transition-delay: 0.20s;
}

.delay-3 {
    transition-delay: 0.30s;
}

.delay-4 {
    transition-delay: 0.40s;
}

.delay-5 {
    transition-delay: 0.50s;
}

.delay-6 {
    transition-delay: 0.60s;
}

/* ===================================================
   LAYOUT HELPERS
   =================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-alt {
    background: rgba(255, 255, 255, 0.025);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    font-family: 'Poppins', 'Inter', sans-serif;
    margin-bottom: 0.75rem;
}

.section-header .divider {
    width: 64px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 9999px;
    margin: 0 auto;
}

/* ===================================================
   GRADIENT TEXT
   =================================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* ===================================================
   NAVIGATION
   =================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(2, 6, 23, 0.80);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
    background: rgba(2, 6, 23, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-size: 1.6rem;
    font-weight: 800;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--muted);
    position: relative;
    transition: color var(--transition);
    font-size: 0.95rem;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    transition: width 0.3s ease, left 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-theme {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all var(--transition);
}

.btn-theme:hover {
    background: rgba(255, 255, 255, 0.10);
    color: #fff;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--muted);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
    display: none;
    background: rgba(2, 6, 23, 0.97);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    padding: 1.25rem 1.5rem;
}

.mobile-menu.open {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 0.75rem 0;
    color: var(--muted);
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: color var(--transition);
}

.mobile-menu a:hover {
    color: #fff;
}

/* ===================================================
   BUTTONS
   =================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.45);
}

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

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.10);
    transform: translateY(-3px);
}

/* ===================================================
   HERO SECTION
   =================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 7rem 0 4rem;
    position: relative;
    overflow: hidden;
}

/* Animated blobs */
.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.20;
    animation: floatY 6s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -180px;
    left: -180px;
    animation-delay: 0s;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -120px;
    right: -120px;
    animation-delay: 2s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 4s;
    opacity: 0.10;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1.25rem;
    animation: fadeInUp 0.7s ease forwards;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.03em;
    font-family: 'Poppins', 'Inter', sans-serif;
    animation: fadeInUp 0.7s 0.1s ease both;
}

.hero-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 9999px;
    margin: 1rem 0;
    animation: fadeInUp 0.7s 0.2s ease both;
}

.hero-role {
    font-size: 1.15rem;
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 0.4rem;
    animation: fadeInUp 0.7s 0.3s ease both;
}

.hero-role2 {
    font-size: 1rem;
    color: var(--faint);
    margin-bottom: 1.25rem;
    animation: fadeInUp 0.7s 0.35s ease both;
}

.hero-bio {
    font-size: 1.05rem;
    color: var(--muted);
    line-height: 1.75;
    max-width: 520px;
    margin-bottom: 2rem;
    animation: fadeInUp 0.7s 0.45s ease both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.7s 0.5s ease both;
}

.hero-socials {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.75rem;
    animation: fadeInUp 0.7s 0.6s ease both;
}

/* Profile image */
.hero-image-wrap {
    display: flex;
    justify-content: center;
    animation: fadeInUp 0.7s 0.5s ease both;
}

.hero-image-ring {
    position: relative;
    width: 340px;
    height: 340px;
}

.hero-image-ring::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent), var(--primary));
    background-size: 300% 300%;
    animation: borderRotate 4s linear infinite;
    z-index: 0;
}

.hero-image-ring::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0.3;
    filter: blur(40px);
    z-index: -1;
    animation: pulseGlow 3s ease-in-out infinite;
}

.hero-image-ring img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 1;
    border: 4px solid var(--darker);
}

/* Floating badges */
.hero-badge {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
    z-index: 2;
    animation: floatY 4s ease-in-out infinite;
}

.hero-badge i {
    color: var(--primary);
}

.hero-badge-1 {
    bottom: 15%;
    right: -35px;
    animation-delay: 0s;
}

.hero-badge-2 {
    bottom: 5%;
    left: -25px;
    animation-delay: 2s;
}

/* Scroll cue */
.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    color: var(--faint);
    font-size: 0.75rem;
    animation: fadeIn 1.5s 1s both;
    z-index: 2;
}

.hero-scroll-dot {
    width: 24px;
    height: 40px;
    border: 2px solid var(--faint);
    border-radius: 12px;
    position: relative;
}

.hero-scroll-dot::after {
    content: '';
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: floatY 1.5s ease-in-out infinite;
}

/* ===================================================
   SOCIAL ICONS
   =================================================== */
.social-icon {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--muted);
    font-size: 1rem;
    transition: all var(--transition);
}

.social-icon:hover {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-color: transparent;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.35);
}

.social-icon-lg {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    font-size: 1.2rem;
}

/* ===================================================
   ABOUT
   =================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    color: var(--primary);
    margin-bottom: 1.25rem;
}

.about-text p {
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.stat-card h4 {
    font-size: 2rem;
    font-weight: 800;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card p {
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all var(--transition);
}

.info-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateX(4px);
}

.info-card i {
    color: var(--primary);
    font-size: 1.1rem;
    width: 20px;
}

.info-card-text {
    display: flex;
    flex-direction: column;
}

.info-card-text span:first-child {
    font-size: 0.75rem;
    color: var(--faint);
}

.info-card-text span:last-child {
    font-size: 0.95rem;
    font-weight: 600;
}

/* ===================================================
   SKILLS
   =================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
}

.skill-category:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

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

.skill-item {
    margin-bottom: 1.1rem;
}

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

.skill-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 0.4rem;
}

.skill-bar {
    height: 7px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 9999px;
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    border-radius: 9999px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    width: 0;
    transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
    animation: pulseGlow 2.5s ease-in-out infinite;
}

/* ===================================================
   CERTIFICATIONS (icons)
   =================================================== */
.cert-icons-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
    margin-top: 3rem;
}

.cert-icon-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all var(--transition);
}

.cert-icon-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.cert-icon-card i {
    font-size: 2.25rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.cert-icon-card h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--muted);
}

/* ===================================================
   COURSE CERTIFICATES (images)
   =================================================== */
.cert-display-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.cert-display-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all var(--transition);
    overflow: hidden;
}

.cert-display-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.cert-img-wrap {
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
    cursor: pointer;
    border: 1px solid var(--card-border);
    transition: all var(--transition);
}

.cert-img-wrap:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.4);
}

.cert-img-wrap img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition);
}

.cert-img-wrap:hover img {
    transform: scale(1.05);
}

.cert-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.cert-card-sub {
    font-size: 0.9rem;
    color: var(--muted);
}

.cert-card-org {
    font-size: 0.8rem;
    color: var(--faint);
    margin-top: 0.2rem;
}

/* ===================================================
   EXPERIENCE TIMELINE
   =================================================== */
.timeline {
    position: relative;
    padding-top: 1rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    position: relative;
    margin-bottom: 3rem;
}

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

/* Centre dot */
.timeline-item::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 1.75rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transform: translateX(-50%);
    z-index: 2;
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.7);
}

.timeline-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
}

.timeline-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.4);
    transform: scale(1.02);
}

.timeline-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    color: var(--primary);
    margin-bottom: 0.4rem;
}

.timeline-card .role {
    color: var(--text);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-card .period {
    color: var(--muted);
    font-size: 0.875rem;
}

.timeline-card .place {
    color: var(--faint);
    font-size: 0.8rem;
    margin-top: 0.2rem;
}

.timeline-points {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.timeline-point {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.timeline-point i {
    color: var(--primary);
    margin-top: 3px;
    flex-shrink: 0;
    font-size: 0.8rem;
}

/* Alternating layout */
.timeline-item.alt .timeline-card {
    order: 2;
    text-align: right;
}

.timeline-item.alt .timeline-points {
    order: 1;
}

.timeline-item.alt .timeline-point {
    flex-direction: row-reverse;
}

/* ===================================================
   EDUCATION
   =================================================== */
.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
}

.edu-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    display: flex;
    gap: 1.25rem;
    transition: all var(--transition);
}

.edu-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.edu-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.edu-icon-1 {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.edu-icon-2 {
    background: linear-gradient(135deg, var(--secondary), var(--accent));
}

.edu-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    margin-bottom: 0.35rem;
}

.edu-card .uni {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.edu-card .yr {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 0.2rem;
}

.edu-card p {
    color: var(--muted);
    font-size: 0.875rem;
    margin-top: 0.75rem;
    line-height: 1.6;
}

/* Achievements */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.achievement-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    text-align: center;
    transition: all var(--transition);
}

.achievement-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.achievement-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.achievement-card h4 {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.achievement-card p {
    color: var(--muted);
    font-size: 0.875rem;
}

/* ===================================================
   CONTACT
   =================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all var(--transition);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateX(5px);
}

.contact-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-card-text small {
    font-size: 0.75rem;
    color: var(--faint);
    display: block;
}

.contact-card-text a,
.contact-card-text span {
    font-weight: 600;
    font-size: 0.95rem;
    transition: color var(--transition);
}

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

.contact-socials {
    margin-top: 1.5rem;
}

.contact-socials h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-social-row {
    display: flex;
    gap: 0.75rem;
}

/* Contact form */
.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--faint);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.20);
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.btn-submit {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all var(--transition);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.45);
}

/* ===================================================
   FOOTER
   =================================================== */
.footer {
    background: var(--darker);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    padding: 2.5rem 0;
    text-align: center;
}

.footer p {
    color: var(--faint);
    font-size: 0.875rem;
}

.footer p+p {
    margin-top: 0.4rem;
}

.footer i.fa-heart {
    color: #ef4444;
}

/* ===================================================
   SCROLL-TO-TOP
   =================================================== */
#scrollTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition), transform var(--transition);
    z-index: 999;
    border: none;
}

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

#scrollTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(99, 102, 241, 0.55);
}

/* ===================================================
   LIGHT MODE
   =================================================== */
html.light-mode {
    --dark: #f8fafc;
    --darker: #e2e8f0;
    --card-bg: rgba(0, 0, 0, 0.04);
    --card-border: rgba(0, 0, 0, 0.09);
    --text: #1e293b;
    --muted: #475569;
    --faint: #94a3b8;
}

html.light-mode body {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #ede9fe 100%);
    color: #1e293b;
}

html.light-mode .navbar {
    background: rgba(248, 250, 252, 0.85);
    border-color: rgba(0, 0, 0, 0.08);
}

html.light-mode .mobile-menu {
    background: rgba(248, 250, 252, 0.98);
}

html.light-mode .footer {
    background: #e2e8f0;
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 1024px) {
    .skills-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cert-icons-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {

    .nav-menu,
    .nav-actions .btn-theme {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }

    .hero-image-wrap {
        order: -1;
    }

    .hero-image-ring {
        width: 250px;
        height: 250px;
    }

    .hero-badge {
        display: none;
    }

    .hero-bio {
        margin: 0 auto 1.5rem;
    }

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

    .hero-scroll {
        display: none;
    }

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

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

    .cert-icons-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cert-display-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 1rem;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        padding-left: 2.5rem;
    }

    .timeline-item::after {
        left: 1rem;
    }

    .timeline-item.alt .timeline-card {
        order: unset;
        text-align: left;
    }

    .timeline-item.alt .timeline-points {
        order: unset;
    }

    .timeline-item.alt .timeline-point {
        flex-direction: row;
    }

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

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

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

@media (max-width: 480px) {
    .cert-icons-grid {
        grid-template-columns: 1fr 1fr;
    }

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

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