/* Variables CSS para tema lofi */
:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent: #ff6b6b;
    --accent-hover: #ff5252;
    --success: #4caf50;
    --warning: #ff9800;
    --border: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
    --grain-opacity: 0.03;
    --transition: all 0.2s ease;
    
    /* Tipografía monoespaciada */
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-system);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Efecto de grano de fondo */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 200, 200, 0.1) 0%, transparent 50%);
    opacity: var(--grain-opacity);
    pointer-events: none;
    z-index: -1;
    animation: grain 8s linear infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -5%); }
    20% { transform: translate(-10%, 5%); }
    30% { transform: translate(5%, -10%); }
    40% { transform: translate(-5%, 15%); }
    50% { transform: translate(-10%, 5%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 15%); }
    80% { transform: translate(-15%, -10%); }
    90% { transform: translate(10%, 5%); }
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 107, 107, 0.3);
}

.main-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-success {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #45a049;
    border-color: #45a049;
}

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

/* Main layout */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    min-height: calc(100vh - 120px);
}

/* Área de carga */
.upload-area {
    grid-column: 1 / -1;
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    background: var(--bg-secondary);
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.upload-area.dragover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
    transform: scale(1.02);
}

.upload-content {
    max-width: 400px;
    margin: 0 auto;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.upload-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Canvas container */
.canvas-container {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    box-shadow: 0 8px 32px var(--shadow);
}

#mainCanvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
}

#mainCanvas:hover {
    transform: scale(1.01);
}

/* Panel de controles */
.controls-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    height: fit-content;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    position: sticky;
    top: 120px;
}

.controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.controls-header h2 {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--text-primary);
}

.preset-buttons {
    display: flex;
    gap: 0.25rem;
}

.preset-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Secciones de filtros */
.filter-section {
    margin-bottom: 2rem;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.control-group {
    margin-bottom: 1rem;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem 1rem;
    align-items: center;
}

.control-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.slider:hover {
    background: var(--bg-primary);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.control-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 3rem;
    text-align: right;
}

.select {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.2);
}

/* Mensajes */
.messages {
    position: fixed;
    top: 100px;
    right: 1.5rem;
    z-index: 1000;
    max-width: 300px;
}

.message {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    box-shadow: 0 4px 12px var(--shadow);
    animation: messageSlide 0.3s ease;
}

.message.success {
    border-color: var(--success);
    background: rgba(76, 175, 80, 0.1);
}

.message.error {
    border-color: var(--accent);
    background: rgba(255, 107, 107, 0.1);
}

.message.warning {
    border-color: var(--warning);
    background: rgba(255, 152, 0, 0.1);
}

@keyframes messageSlide {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive design */
@media (max-width: 1024px) {
    .main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .controls-panel {
        position: static;
        max-height: none;
        order: -1;
    }
    
    .canvas-container {
        order: 1;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .main {
        padding: 1rem;
        gap: 1rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .control-group {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .control-value {
        text-align: left;
    }
    
    .messages {
        right: 1rem;
        left: 1rem;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.2rem;
    }
    
    .main-controls {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        width: 100%;
    }
    
    .btn {
        justify-content: center;
    }
    
    .preset-buttons {
        flex-wrap: wrap;
    }
}

/* Estados de focus para accesibilidad */
.btn:focus,
.slider:focus,
.select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Scrollbar personalizada */
.controls-panel::-webkit-scrollbar {
    width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Animaciones de micro-interacciones */
.slider::-webkit-slider-thumb:active {
    transform: scale(1.2);
}

.preset-btn:active {
    transform: scale(0.95);
}

.btn:focus-visible {
    animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(255, 107, 107, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0); }
}