/* ============================================
   Star's Studio - Main Stylesheet
   Palette: Purple + Yellow, Dark/Light toggle
   ============================================ */

/* --- CSS Custom Properties (Dark default) --- */
:root {
    /* Colors */
    --bg-primary: #0d0d1a;
    --bg-secondary: #141428;
    --bg-card: #1a1a35;
    --bg-card-hover: #222248;
    --text-primary: #f0f0f5;
    --text-secondary: #b0b0cc;
    --text-muted: #7878a0;
    --accent-purple: #8b5cf6;
    --accent-purple-light: #a78bfa;
    --accent-purple-dark: #7c3aed;
    --accent-yellow: #fbbf24;
    --accent-yellow-light: #fcd34d;
    --accent-yellow-dark: #f59e0b;
    --border-color: #2a2a4a;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --gradient-purple: linear-gradient(135deg, #8b5cf6, #6d28d9);
    --gradient-yellow: linear-gradient(135deg, #fbbf24, #f59e0b);
    --gradient-hero: linear-gradient(180deg, #0d0d1a 0%, #1a0a2e 50%, #0d0d1a 100%);

    /* Typography */
    --font-heading: 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 6rem 0;
    --container-max: 1200px;
    --nav-height: 70px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* --- Light Theme --- */
[data-theme="light"] {
    --bg-primary: #fafafe;
    --bg-secondary: #f0f0f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f5f5ff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888a8;
    --border-color: #e0e0ee;
    --shadow-color: rgba(139, 92, 246, 0.1);
    --gradient-hero: linear-gradient(180deg, #fafafe 0%, #ede9fe 50%, #fafafe 100%);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    height: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: var(--accent-purple-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-yellow);
}

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

/* --- Main Content --- */
main {
    flex: 1;
}

/* --- Container --- */
.container {
    width: 90%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1rem;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(13, 13, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .navbar {
    background: rgba(250, 250, 254, 0.85);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-logo .star {
    color: var(--accent-yellow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.25rem 0;
}

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

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

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

/* Nav controls (theme + language) */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.nav-btn:hover {
    background: var(--accent-purple);
    color: white;
    border-color: var(--accent-purple);
}

/* Mobile menu */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
}

/* --- Hero Section (Home) --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: transparent;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero-content {
    text-align: center;
    z-index: 2;
    padding: 2rem;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero-title .highlight {
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Star Eyes (Hero) --- */
.star-eyes-container {
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 60px;
    pointer-events: none;
}

.star-eye {
    width: 80px;
    height: 80px;
    position: relative;
}

.star-eye svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 20px rgba(251, 191, 36, 0.4));
}

.star-eye .pupil {
    transition: transform 0.1s ease-out;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-purple);
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(139, 92, 246, 0.5);
    color: white;
}

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

.btn-outline:hover {
    border-color: var(--accent-purple);
    color: var(--accent-purple-light);
    transform: translateY(-2px);
}

/* --- Section Styles --- */
.section {
    padding: var(--section-padding);
    position: relative;
}

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

.section-tag {
    display: inline-block;
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-purple-light);
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image .image-wrapper {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    background: var(--gradient-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    position: relative;
    overflow: hidden;
}

.about-image .image-wrapper::before {
    content: '⭐';
    font-size: 10rem;
    opacity: 0.15;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.about-image .avatar {
    font-size: 6rem;
    z-index: 1;
}

.about-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.skill-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    transition: all var(--transition-fast);
}

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

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.skill-level {
    color: var(--accent-yellow);
    font-weight: 700;
    font-size: 0.85rem;
}

.skill-bar {
    height: 6px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: var(--gradient-purple);
    border-radius: var(--radius-full);
    transition: width 1s ease;
    width: 0;
}

/* --- Portfolio Section --- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

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

.portfolio-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-purple);
    box-shadow: 0 12px 40px var(--shadow-color);
}

.portfolio-card-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.portfolio-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-card-image img {
    transform: scale(1.05);
}

.portfolio-card-body {
    padding: 1.5rem;
}

.portfolio-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.portfolio-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.portfolio-tag {
    background: rgba(139, 92, 246, 0.12);
    color: var(--accent-purple-light);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.contact-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-details li {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
}

.contact-details .icon {
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

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

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

/* --- Footer --- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.footer-logo .star {
    color: var(--accent-yellow);
}

.footer-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Scroll animations --- */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .star-eyes-container {
        top: 12%;
        gap: 40px;
    }

    .star-eye {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 30px var(--shadow-color);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

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

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

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .star-eyes-container {
        top: 10%;
        gap: 30px;
    }

    .star-eye {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 4rem 0;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* --- Accessibility --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-purple);
    outline-offset: 2px;
}

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-purple);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    z-index: 10000;
    font-weight: 600;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 1rem;
}