/* Premium Portfolio Design System */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;1,600&display=swap');

:root {
    /* DEFAULT DARK MODE (Glassmorphism & Gradients) */
    --font-sans: 'Outfit', sans-serif;
    --font-display: 'Playfair Display', serif;

    --bg-base: #0a0a0b;
    --bg-surface: #141417;
    --bg-surface-hover: #1f1f24;

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

    --accent-primary: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.4);
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);

    --border-light: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(255, 255, 255, 0.15);

    --glass-bg: rgba(10, 10, 11, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-blur: blur(20px);

    --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 9999px;

    --transition-fast: 0.2s ease-in-out;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

body.light-mode {
    --bg-base: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;

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

    --accent-primary: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.3);
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);

    --border-light: rgba(0, 0, 0, 0.08);
    --border-focus: rgba(0, 0, 0, 0.15);

    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.05);

    --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.06);
}

body.gradient-mode {
    --bg-base: #0f0c29;
    --bg-surface: rgba(255, 255, 255, 0.03);
    --bg-surface-hover: rgba(255, 255, 255, 0.08);

    --accent-primary: #00f2ff;
    --accent-glow: rgba(0, 242, 255, 0.4);
    --accent-gradient: linear-gradient(135deg, #00f2ff 0%, #bc13fe 100%);

    --glass-bg: rgba(15, 12, 41, 0.6);
    background-image: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
}

body.sunset-mode {
    --bg-base: #450a0a;
    --bg-surface: rgba(0, 0, 0, 0.2);
    --bg-surface-hover: rgba(0, 0, 0, 0.4);

    --accent-primary: #ffd700;
    --accent-glow: rgba(255, 215, 0, 0.4);
    --accent-gradient: linear-gradient(135deg, #ffd700 0%, #ff4500 100%);

    --text-primary: #fef3c7;
    --text-secondary: #fcd34d;

    --glass-bg: rgba(69, 10, 10, 0.6);
    background-image: linear-gradient(135deg, #991b1b, #d97706, #b45309);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
    border-radius: var(--radius-sm);
}

/* Typography */
h1,
h2,
h3,
h4 {
    color: var(--text-primary);
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2.2rem, 5vw, 3rem);
    margin-bottom: 3.5rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: var(--radius-pill);
}

/* Progress */
#progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 2000;
}

#progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    width: 0%;
    box-shadow: var(--shadow-glow);
    transition: width 0.1s;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--glass-bg);
    padding: 1.25rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-subtle);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.logo {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 8px var(--accent-primary));
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: var(--radius-pill);
    transition: width var(--transition-smooth);
}

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

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

#theme-toggle {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-subtle);
}

#theme-toggle:hover {
    transform: translateY(-2px) rotate(15deg);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    padding: 0.5rem;
}

.hamburger .bar {
    width: 28px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

/* Hero */
#home {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 5% 4rem;
    position: relative;
}

.profile-photo {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    padding: 4px;
    background: var(--accent-gradient);
    box-shadow: var(--shadow-glow);
    margin-bottom: 2.5rem;
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.profile-photo:hover {
    transform: scale(1.05) rotate(-2deg);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    display: inline-block;
}

.typewriter {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-style: italic;
    min-height: 2em;
    margin-bottom: 3rem;
}

.cursor {
    display: inline-block;
    width: 3px;
    height: 1.2em;
    background: var(--accent-gradient);
    animation: blink 1s step-end infinite;
    margin-left: 5px;
    vertical-align: text-bottom;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

.btn-container {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.btn.primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--accent-glow);
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.03);
    transform: translateY(-3px);
}

/* Layout & Cards */
section {
    padding: 6rem 10%;
}

.about-content {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.glass-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.03), transparent);
    pointer-events: none;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-focus);
    box-shadow: var(--shadow-subtle);
    background: var(--bg-surface-hover);
}

/* Timeline (Exp/Edu) */
.edu-card,
.exp-card {
    border-left: 3px solid var(--accent-primary);
    margin-bottom: 2rem;
    padding: 2rem 2.5rem;
}

.edu-card h3,
.exp-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.edu-card p,
.exp-card p {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.exp-card ul {
    color: var(--text-muted);
    padding-left: 1.5rem;
}

.exp-card ul li {
    position: relative;
    margin-bottom: 0.5rem;
    list-style: none;
}

.exp-card ul li::before {
    content: '▹';
    position: absolute;
    left: -1.5rem;
    color: var(--accent-primary);
}

.exp-card ul li:nth-child(n) {
    color: var(--text-muted);
}

/* Skills */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.skill-tag {
    padding: 0.8rem 1.8rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-smooth);
    cursor: default;
}

.skill-tag:hover {
    border-color: var(--accent-primary);
    background: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* Grids */
.projects-grid,
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
}

/* Project Cards */
.project-card {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.project-tech {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--accent-primary);
    background: rgba(56, 189, 248, 0.1);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    width: fit-content;
    margin-bottom: 1.5rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
    margin-left: 1.5rem;
    margin-right: 1.5rem;
}

.project-links {
    display: flex;
    gap: 1.5rem;
    margin-top: auto;
    padding: 0 1.5rem 1.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-primary);
    gap: 0.8rem;
}

/* Cert Cards */
.cert-card {
    padding: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.cert-img-container {
    width: 100%;
    height: 220px;
    background: var(--bg-base);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.cert-img-container::after {
    content: '🔍 View';
    position: absolute;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-pill);
    opacity: 0;
    transition: opacity 0.3s ease;
    font-weight: 500;
    z-index: 2;
}

.cert-img-container:hover::after {
    opacity: 1;
}

.cert-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.5s ease;
    position: relative;
    z-index: 1;
}

.cert-card:hover .cert-img {
    transform: scale(1.08);
}

.cert-info {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-light);
    background: var(--bg-surface);
}

.cert-title {
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.cert-issuer {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Actions */
#backToTop {
    display: none;
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 99;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    outline: none;
    background: var(--accent-gradient);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    transition: var(--transition-smooth);
    opacity: 0;
    pointer-events: none;
}

#backToTop.show {
    opacity: 1;
    display: flex;
    pointer-events: auto;
}

#backToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--accent-glow);
    filter: brightness(1.1);
}

/* Forms & Contact */
#contact .contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-surface);
    padding: 3rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-subtle);
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 1rem 1.2rem;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 150px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.social-links .btn {
    padding: 0.8rem 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    font-size: 0.95rem;
}

.social-links .btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    max-width: 90%;
    max-height: 85vh;
    border-radius: var(--radius-sm);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s;
}

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

.close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: white;
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    transition: 0.2s;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 5%;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
    h2 {
        font-size: 2.5rem;
    }

    section {
        padding: 6rem 5%;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        background: var(--glass-bg);
        padding: 6rem 2rem;
        flex-direction: column;
        gap: 1.5rem;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        transition: right 0.4s;
        backdrop-filter: var(--glass-blur);
        border-left: 1px solid var(--border-light);
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .profile-photo {
        width: 180px;
        height: 180px;
    }

    .edu-card,
    .exp-card {
        padding: 1.5rem;
    }

    #contact .contact-wrapper {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .typewriter {
        font-size: 1.1rem;
    }

    .btn {
        width: 100%;
    }

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

    section {
        padding: 5rem 5%;
    }
}


/* --- AMBIENT ORBS & NOISE --- */
.ambient-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.noise-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.04;
    mix-blend-mode: overlay;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out alternate;
    mix-blend-mode: screen;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: #bc13fe;
    bottom: -150px;
    right: -150px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: #38bdf8;
    top: 40%;
    left: 40%;
    animation: float 25s infinite ease-in-out alternate-reverse;
    opacity: 0.1;
}

@keyframes float {
    0% {
        transform: translateY(0) translateX(0) scale(1);
    }

    50% {
        transform: translateY(100px) translateX(50px) scale(1.1);
    }

    100% {
        transform: translateY(-50px) translateX(-100px) scale(0.9);
    }
}

/* --- CUSTOM SCROLLBAR (PREMIUM TOUCH) --- */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-focus);
    border-radius: var(--radius-pill);
    border: 3px solid var(--bg-surface);
}

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

/* --- SELECTION COLOR --- */
::selection {
    background: var(--accent-glow);
    color: var(--text-primary);
}

/* --- POLISHED CARD HOVERS (Magnetic shine effect) --- */
.glass-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 1px var(--border-light);
    transition: var(--transition-smooth);
    pointer-events: none;
}

.glass-card:hover::after {
    box-shadow: inset 0 0 0 1px var(--accent-glow);
}

/* Ensure image modal is fully above navbar & progress bar */
.modal {
    z-index: 99999;
}