/* ============================================
   🌿 Ivy's GPU Art Studio — Styles
   Dark, Modern, Sexy Theme
   ============================================ */

:root {
    /* Colors - Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #1e1e2a;
    --bg-hover: #252535;

    /* Accent Colors */
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #8b5cf6; /* Purple */
    --accent-tertiary: #06b6d4; /* Cyan */
    --accent-success: #10b981; /* Emerald */
    --accent-warning: #f59e0b; /* Amber */
    --accent-error: #ef4444; /* Red */

    /* Ivy's Green 🌿 */
    --ivy-green: #22c55e;
    --ivy-green-dark: #16a34a;
    --ivy-green-light: #4ade80;

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

    /* Borders */
    --border-color: #2e2e3e;
    --border-focus: var(--accent-primary);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Fonts */
    --font-sans: "Space Grotesk", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", monospace;
}

/* ============================================
   Reset & Base
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;

    /* Subtle animated gradient background */
    background:
        radial-gradient(ellipse at top left, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.1) 0%, transparent 50%), var(--bg-primary);
}

/* ============================================
   App Container
   ============================================ */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ============================================
   Header
   ============================================ */

.header {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.logo-icon {
    font-size: 2.5rem;
    animation: gentle-float 3s ease-in-out infinite;
}

@keyframes gentle-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--ivy-green), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

/* ============================================
   Navigation Tabs
   ============================================ */

.tabs-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tab:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.tab:focus-visible {
    outline: 2px solid var(--ivy-green);
    outline-offset: 2px;
}

.tab.active {
    color: var(--text-primary);
    background: var(--bg-card);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.tab-icon {
    font-size: 1.2rem;
}

.tab-label {
    display: none;
}

@media (min-width: 640px) {
    .tab-label {
        display: inline;
    }
}

/* ============================================
   Main Content
   ============================================ */

.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    flex: 1;
}

@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr 300px;
    }
}

/* ============================================
   Canvas Container
   ============================================ */

.canvas-container {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

#gpuCanvas,
#threeCanvas {
    width: 100%;
    height: 100%;
    display: block;
    background: #000;
}

#p5Container,
#p5AudioContainer {
    width: 100%;
    height: 100%;
    background: #0a0a0f;
}

#p5Container canvas,
#p5AudioContainer canvas {
    display: block;
}

#gpuCanvas.hidden,
#threeCanvas.hidden,
#p5Container.hidden,
#p5AudioContainer.hidden {
    display: none;
}

.error-message {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 15, 0.95);
    text-align: center;
    padding: var(--spacing-xl);
}

.error-message.hidden {
    display: none;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.error-message p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

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

.loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 15, 0.9);
}

.loading.hidden {
    display: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

/* ============================================
   Controls Panel
   ============================================ */

.controls-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    height: fit-content;
    position: sticky;
    top: var(--spacing-md);
}

.controls-section {
    display: none;
}

.controls-section.active {
    display: block;
}

.controls-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.control-group {
    margin-bottom: var(--spacing-md);
}

.control-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.control-group label span {
    color: var(--accent-tertiary);
    font-family: var(--font-mono);
}

/* Select */
select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.2rem;
}

select:hover {
    border-color: var(--accent-primary);
}

select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Range Slider */
input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    appearance: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-md);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:disabled,
.btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.7;
}

.btn-reset {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
}

.btn-reset:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

/* Focus states for accessibility */
.btn:focus-visible,
select:focus-visible,
input[type="range"]:focus-visible {
    outline: 2px solid var(--ivy-green);
    outline-offset: 2px;
}

/* Custom Checkbox Styling */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    vertical-align: middle;
    margin-right: var(--spacing-xs);
}

input[type="checkbox"]:hover {
    border-color: var(--accent-primary);
}

input[type="checkbox"]:checked {
    background: linear-gradient(135deg, var(--ivy-green), var(--ivy-green-dark));
    border-color: var(--ivy-green);
}

input[type="checkbox"]:checked::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

input[type="checkbox"]:focus-visible {
    outline: 2px solid var(--ivy-green);
    outline-offset: 2px;
}

.hint {
    font-size: 0.85rem;
    color: var(--ivy-green-light);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(34, 197, 94, 0.1); /* Using --ivy-green RGB values */
    border-left: 3px solid var(--ivy-green);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
}

/* File Input */
input[type="file"] {
    display: none;
}

input[type="file"].hidden {
    display: none;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-quote {
    font-style: italic;
    color: var(--ivy-green);
    margin-top: var(--spacing-xs);
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none !important;
}

/* ============================================
   Scrollbar Styling
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

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

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (max-width: 640px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .tab {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .canvas-container {
        aspect-ratio: 4 / 3;
    }

    .controls-panel {
        position: relative;
        top: 0;
        padding: var(--spacing-md);
    }

    .controls-section h3 {
        margin-bottom: var(--spacing-md);
        font-size: 1rem;
    }

    /* Better touch targets on mobile */
    .tab {
        min-height: 44px;
    }

    .btn {
        min-height: 44px;
    }

    select {
        min-height: 44px;
    }

    /* Stack footer links vertically on very small screens */
    .footer-links {
        flex-wrap: wrap;
    }
}

/* Extra small screens */
@media (max-width: 380px) {
    .tabs-container {
        gap: var(--spacing-xs);
        padding: var(--spacing-xs);
    }

    .tab {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }

    .tab-icon {
        font-size: 1rem;
    }
}

/* ============================================
   Animations
   ============================================ */

@keyframes pulse-glow {
    0%,
    100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    }
}

.canvas-container:focus-within {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* ============================================
   Footer Links
   ============================================ */

.footer-link {
    color: var(--ivy-green);
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--ivy-green-light);
    text-decoration: underline;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

.footer-icon-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.25rem;
    transition:
        color 0.2s,
        transform 0.2s,
        filter 0.2s;
    display: flex;
    align-items: center;
}

.footer-icon-link:hover {
    color: var(--ivy-green);
    transform: scale(1.15);
    filter: drop-shadow(0 0 6px var(--ivy-green));
}

.footer-icon-link svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   About Modal
   ============================================ */

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    isolation: isolate; /* Create new stacking context */
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(6px);
    z-index: -1; /* Behind content but within modal stacking context */
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 700px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow:
        var(--shadow-lg),
        0 0 40px rgba(34, 197, 94, 0.2);
    animation: modal-appear 0.3s ease-out;
}

@keyframes modal-appear {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition:
        color 0.2s,
        transform 0.2s;
    line-height: 1;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--accent-error);
    background: rgba(239, 68, 68, 0.1);
    transform: rotate(90deg);
}

.modal-header {
    padding: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.modal-header h2 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.75rem;
    color: var(--ivy-green);
    margin: 0;
}

.modal-version {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.modal-body {
    padding: var(--spacing-lg);
}

.about-section {
    margin-bottom: var(--spacing-xl);
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h3 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.about-section ul {
    color: var(--text-secondary);
    padding-left: var(--spacing-lg);
    line-height: 1.8;
}

.about-section ul li {
    margin-bottom: var(--spacing-xs);
}

.family-list {
    list-style: none;
    padding: 0;
}

.family-list li {
    padding: var(--spacing-xs) 0;
}

/* Help Grid */
.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.help-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.help-item:hover {
    border-color: var(--ivy-green);
}

.help-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.help-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.help-item p {
    font-size: 0.875rem;
    margin: 0;
}

/* About Footer */
.about-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.modal-quote {
    font-style: italic;
    color: var(--ivy-green);
    margin-bottom: var(--spacing-lg);
}

.modal-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.modal-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.modal-link:hover {
    background: var(--ivy-green);
    border-color: var(--ivy-green);
    color: #000;
    transform: translateY(-2px);
}

/* Wallet Support Section */
.wallet-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.wallet-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.2s;
}

.wallet-item:hover {
    border-color: var(--ivy-green);
}

.wallet-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
    flex-shrink: 0;
}

.wallet-info {
    flex: 1;
    min-width: 0;
}

.wallet-info strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.wallet-address {
    display: block;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    word-break: break-all;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.wallet-address:hover {
    color: var(--ivy-green);
    border-color: var(--ivy-green);
}

.wallet-address:active {
    background: var(--ivy-green);
    color: #000;
}

.wallet-address.copied {
    background: var(--accent-success);
    color: #000;
    border-color: var(--accent-success);
    font-weight: 600;
}

.copy-hint {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.support-thanks {
    text-align: center;
    font-size: 0.875rem;
    color: var(--ivy-green);
    margin-top: var(--spacing-md);
}

/* Modal Scrollbar */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--ivy-green-dark);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--ivy-green);
}