/* ============================================
   Interactive 3D - Dark Cyberpunk Theme
   Colors: #00d4ff (cyan), #7c3aed (purple)
   ============================================ */

:root {
    --cyan: #00d4ff;
    --cyan-dim: rgba(0, 212, 255, 0.7);
    --purple: #7c3aed;
    --purple-dim: rgba(124, 58, 237, 0.6);
    --bg-dark: #0a0a0f;
    --bg-card: rgba(15, 15, 25, 0.75);
    --glass: rgba(20, 20, 35, 0.6);
    --glass-border: rgba(0, 212, 255, 0.15);
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --font-mono: 'JetBrains Mono', monospace;
    --font-display: 'Orbitron', sans-serif;
    --sidebar-width: 340px;
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-mono);
    background: var(--bg-dark);
    color: var(--text);
}

#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: visible;
    padding: 0;
    border: none;
}

/* Hidden on desktop; unused on mobile (3D band + sidebar margin handle layout) */
.mobile-gap {
    display: none;
    height: 0;
}

/* Mobile: 3D stays on top so sidebar content scrolls "into" the 3D (behind it) */
@media (max-width: 900px) {
    html {
        overflow-x: hidden;
        overflow-y: scroll;
        -webkit-overflow-scrolling: touch;
    }

    body {
        overflow-x: hidden !important;
        overflow-y: scroll !important;
        min-height: 100%;
        height: auto !important;
        -webkit-overflow-scrolling: touch;
    }

    /* 3D band at top; higher z-index so scrolling content goes behind it */
    #canvas-container {
        height: 40vh;
        min-height: 40vh;
        overflow: visible;
        z-index: 30;
    }
}

#canvas-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* ----- Header ----- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: var(--sidebar-width);
    z-index: 10;
    padding: 1.5rem 2rem;
    background: linear-gradient(180deg, var(--bg-dark) 0%, transparent 100%);
    pointer-events: none;
}

.logo {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
}

.tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    letter-spacing: 0.1em;
}

/* ----- Sidebar ----- */
.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--sidebar-width);
    height: 100%;
    z-index: 20;
    padding: 1.5rem;
    overflow-y: auto;
    pointer-events: auto;
}

.sidebar-inner {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    min-height: 200px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.sidebar-title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--cyan);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

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

.project-card {
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    background: rgba(0, 0, 0, 0.2);
}

.project-card:hover {
    border-color: var(--cyan-dim);
    background: rgba(0, 212, 255, 0.06);
    transform: translateX(-4px);
}

.project-card.active {
    border-color: var(--cyan);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.project-card .title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 0.35rem;
}

.project-card .description {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.project-card .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.project-card .tag {
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: rgba(124, 58, 237, 0.25);
    color: var(--cyan);
    border: 1px solid rgba(124, 58, 237, 0.4);
}

/* ----- Contact ----- */
.contact-section {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.contact-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--purple);
    margin-bottom: 0.75rem;
    letter-spacing: 0.1em;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 0.8rem;
    border: 1px solid transparent;
    transition: all var(--transition);
    background: rgba(0, 0, 0, 0.2);
}

.contact-link:hover {
    border-color: var(--cyan);
    background: rgba(0, 212, 255, 0.08);
    color: var(--cyan);
}

.contact-link .contact-icon {
    font-size: 1rem;
    opacity: 0.9;
}

.contact-email:hover { box-shadow: 0 0 15px rgba(0, 212, 255, 0.25); }
.contact-telegram:hover { box-shadow: 0 0 15px rgba(124, 58, 237, 0.35); }
.contact-instagram:hover { box-shadow: 0 0 15px rgba(225, 48, 108, 0.35); }
.contact-github:hover { box-shadow: 0 0 15px rgba(0, 212, 255, 0.25); }

/* ----- Loading ----- */
.loading {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ----- Responsive ----- */
@media (max-width: 900px) {
    :root {
        --sidebar-width: 100%;
    }

    /* Sidebar in flow, below 3D band; z-index below canvas so it scrolls behind 3D */
    .sidebar {
        position: relative !important;
        top: auto !important;
        bottom: auto !important;
        left: auto !important;
        right: auto !important;
        width: 100%;
        margin-top: 40vh;
        padding: 0.75rem 1rem 3rem;
        border-top: 1px solid var(--glass-border);
        overflow: visible;
        -webkit-overflow-scrolling: touch;
        z-index: 10;
    }

    .sidebar-inner {
        max-width: 100%;
        min-height: auto;
    }

    .site-header {
        right: 0;
        z-index: 40;
    }

    .projects-list {
        flex-direction: column;
        overflow-x: visible;
        overflow-y: visible;
        padding-bottom: 0;
        scroll-snap-type: none;
        gap: 0.65rem;
    }

    .project-card {
        min-width: 0;
        width: 100%;
        scroll-snap-align: none;
        flex-shrink: 0;
    }
}

@media (max-width: 600px) {
    #canvas-container {
        height: 38vh;
        min-height: 38vh;
    }

    .site-header {
        padding: 1rem;
    }

    .sidebar {
        margin-top: 38vh;
        padding: 0.6rem 1rem 3rem;
    }

    .sidebar-inner {
        padding: 1rem;
    }

    .project-card .title {
        font-size: 0.85rem;
    }

    .project-card .description {
        font-size: 0.7rem;
    }

    .contact-link span:not(.contact-icon) {
        font-size: 0.75rem;
        word-break: break-all;
    }
}