:root {
    --bg-color: #030712;
    --surface-color: #111827;
    --primary-text: #f9fafb;
    --secondary-text: #9ca3af;
    --accent-color: #8b5cf6;
    --accent-hover: #7c3aed;
    --border-color: #1f2937;
    --container-width: 1000px;
}

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

#gol-canvas {
    position: fixed; /* overridden by JS */
    top: 0;
    left: 0;
    z-index: -1;
    pointer-events: none;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 50% -20%, #2e1065 0%, transparent 50%);
    color: var(--primary-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Navigation */
header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(8px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--primary-text);
}

#lang-toggle {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--secondary-text);
    cursor: pointer;
    transition: color 0.2s ease;
    user-select: none;
}

#lang-toggle:hover {
    color: #e2e8f0;
}

#lang-toggle em {
    font-style: normal;
    color: var(--accent-color);
}


/* Hero Section */
#hero {
    padding: 8rem 0;
    text-align: center;
    position: relative;
}

#hero .container {
    position: relative;
    z-index: 1;
}

/* Ambient orbs */
#hero::before,
#hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(60px);
}

#hero::before {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(109, 40, 217, 0.22) 0%, transparent 65%);
    top: -220px;
    left: 50%;
    transform: translateX(-50%);
    animation: orb-pulse 10s ease-in-out infinite;
}


.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid rgba(139, 92, 246, 0.35);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: #c4b5fd;
    margin-bottom: 1.5rem;
}

#hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.05em;
    margin-bottom: 2.25rem;
    padding-bottom: 0.15em;
    background: linear-gradient(120deg, #ffffff 0%, #c4b5fd 28%, #ffffff 52%, #a78bfa 76%, #e2e8f0 100%);
    background-size: 250% 250%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-pan 9s ease infinite;
}

#hero h1 span {
    display: block;
}

#hero p {
    font-size: clamp(1.125rem, 3vw, 1.25rem);
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn:not(.btn-outline) {
    background-color: var(--primary-text);
    color: var(--bg-color);
}

.btn:not(.btn-outline):hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(255, 255, 255, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--surface-color);
    border-color: var(--secondary-text);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Magical hover buttons */
.btn-magic {
    position: relative;
    overflow: hidden;
    z-index: 0;
    transition: color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}

.btn-magic::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #6d28d9, #8b5cf6, #a78bfa);
    background-size: 200% 200%;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.btn-magic:hover::before {
    opacity: 1;
}

.btn-magic:hover {
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 0 16px rgba(139, 92, 246, 0.35),
                0 4px 12px rgba(0, 0, 0, 0.25);
}

/* Sections */
main section {
    padding: 6rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--secondary-text);
}

/* Projects */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}

.project-card:hover {
    border-color: rgba(139, 92, 246, 0.7);
    transform: translateY(-5px);
    box-shadow: 0 24px 48px -16px rgba(139, 92, 246, 0.3),
                0 0 0 1px rgba(139, 92, 246, 0.12),
                inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.project-content {
    padding: 2rem;
}

.project-card h3 {
    font-size: 1.25rem;
}

.project-content p {
    color: var(--secondary-text);
    font-size: 0.9375rem;
    margin-top: 0.25rem;
}

/* Project cards — clickable */
.project-card {
    cursor: pointer;
    user-select: none;
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.project-content p {
    color: var(--secondary-text);
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

.card-hint {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-color);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.project-card:hover .card-hint,
.project-card:focus .card-hint {
    opacity: 1;
}

/* Floating overlay backdrop */
#project-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(3, 7, 18, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 200;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#project-backdrop.visible {
    opacity: 1;
    pointer-events: all;
}

/* Floating overlay panel */
#project-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 300;
    width: min(560px, calc(100vw - 3rem));
    background: linear-gradient(145deg, #161d2e 0%, #1a1040 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 32px 80px -16px rgba(0, 0, 0, 0.8),
                0 0 0 1px rgba(139, 92, 246, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.05);

    /* Start hidden: shifted down + invisible */
    transform: translate(-50%, calc(-50% + 24px));
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.4, 0.64, 1);
}

#project-overlay.visible {
    transform: translate(-50%, -50%);
    opacity: 1;
    pointer-events: all;
}

#overlay-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

#overlay-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    color: var(--primary-text);
}

#overlay-desc {
    color: var(--secondary-text);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

#overlay-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--secondary-text);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, color 0.2s ease;
}

#overlay-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary-text);
}

.btn-project {
    background-color: var(--accent-color);
    color: #fff;
    padding: 0.7rem 1.5rem;
    font-size: 0.875rem;
    border-radius: 0.75rem;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-project:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -6px rgba(139, 92, 246, 0.5);
}

/* About Section */
.about-text {
    max-width: 680px;
}

.about-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1.75rem;
}

.about-text p {
    color: var(--secondary-text);
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-text p:first-of-type {
    font-size: 1.25rem;
    color: #cbd5e1;
}

.about-uni {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    margin-top: 1.5rem;
    color: var(--secondary-text);
    font-size: 0.9rem;
    font-weight: 500;
}

.about-uni svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--accent-color);
    opacity: 0.85;
}

.about-uni-field {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--secondary-text);
    margin-top: 0.2rem;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.about-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid;
    letter-spacing: 0.01em;
}

.tag-tech {
    background: rgba(59, 130, 246, 0.07);
    border-color: rgba(59, 130, 246, 0.22);
    color: #93c5fd;
}

.tag-music {
    background: rgba(251, 191, 36, 0.07);
    border-color: rgba(251, 191, 36, 0.22);
    color: #fcd34d;
}

/* Contact Card */
.contact-card {
    background: rgba(255, 255, 255, 0.01);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 4rem 2rem;
    border-radius: 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.contact-card h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--secondary-text);
    max-width: 500px;
    margin: 0 auto 2rem;
}

.contact-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-discord {
    background-color: #5865F2;
    color: #fff;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-discord:hover {
    background-color: #4752c4;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -6px rgba(88, 101, 242, 0.55);
}


/* Footer */
footer {
    padding: 1.25rem 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.875rem;
}

/* Three.js Floating Pet */
#three-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 50;
    pointer-events: none; /* Allows interaction with page elements underneath */
}

#three-loading {
    position: fixed;
    bottom: 20px;
    right: 20px;
    color: var(--secondary-text);
    font-size: 0.8rem;
    pointer-events: none;
    z-index: 60;
    background: rgba(3, 7, 18, 0.8);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}


.scene-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--secondary-text);
    margin-top: 1rem;
    font-style: italic;
}

/* Keyframes */
@keyframes gradient-pan {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes orb-pulse {
    0%, 100% { transform: translateX(-50%) scale(1); opacity: 1; }
    50%       { transform: translateX(-50%) scale(1.18); opacity: 0.75; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    #hero h1 { animation: none; background-position: 0% 50%; }
    #hero::before { animation: none; }
}

/* Responsive */
@media (max-width: 768px) {
    #hero {
        padding: 6rem 0;
    }

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

    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        text-align: center;
    }
}