/*
 * Companion Track Generator
 * Design: Cartographic/Topographic Style
 * Inspired by vintage maps and terrain charts
 */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

/* === Design Tokens - Cartographic Palette === */
:root {
    /* Fondos - Tonos pergamino */
    --parchment: #f7f3e9;
    --parchment-dark: #e8e0d0;
    --parchment-light: #fdfcf9;

    /* Texto - Tonos tinta */
    --ink: #2c2416;
    --ink-light: #5c4a32;
    --ink-muted: #8b7a60;

    /* Acentos primarios - Sienna */
    --sienna: #a0522d;
    --sienna-dark: #8b4513;
    --sienna-light: #b8693f;

    /* Acentos secundarios - Amber */
    --amber: #d4a03c;
    --amber-glow: #e8b84a;
    --amber-muted: rgba(212, 160, 60, 0.15);

    /* Estados */
    --sage: #7d9471;
    --sage-light: #9db891;
    --terracotta: #c4785a;
    --terracotta-light: #d89070;

    /* Efectos topográficos */
    --contour: rgba(139, 69, 19, 0.08);
    --contour-dark: rgba(139, 69, 19, 0.15);

    /* Bordes */
    --border-subtle: rgba(139, 69, 19, 0.12);
    --border-hover: rgba(160, 82, 45, 0.35);

    /* Espaciado */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 28px;
    --spacing-xl: 40px;

    /* Radios */
    --radius-sm: 4px;
    --radius-md: 8px;

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--parchment);
    color: var(--ink);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* === Topographic Line Pattern Background === */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        repeating-radial-gradient(
            circle at 20% 20%,
            transparent 0,
            transparent 40px,
            var(--contour) 40px,
            var(--contour) 41px
        ),
        repeating-radial-gradient(
            circle at 75% 75%,
            transparent 0,
            transparent 60px,
            var(--contour) 60px,
            var(--contour) 61px
        ),
        repeating-radial-gradient(
            circle at 50% 50%,
            transparent 0,
            transparent 80px,
            var(--contour-dark) 80px,
            var(--contour-dark) 81px
        ),
        repeating-radial-gradient(
            circle at 85% 15%,
            transparent 0,
            transparent 50px,
            var(--contour) 50px,
            var(--contour) 51px
        );
    opacity: 0.7;
    pointer-events: none;
    z-index: -1;
}

/* === Paper Grain Texture === */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 1000;
}

/* === Layout Container === */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    position: relative;
}

/* === Header === */
header {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    animation: fadeInDown 0.6s ease-out both;
}

header h1 {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.5);
}

header .subtitle {
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-light);
    max-width: 500px;
    margin: 0 auto;
}

/* === Panels/Cards === */
.card {
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.9) 0%,
        rgba(247, 243, 233, 0.95) 100%);
    border: 1px solid var(--parchment-dark);
    border-radius: var(--radius-sm);
    padding: var(--spacing-lg) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow:
        0 2px 8px rgba(44, 36, 22, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    animation: fadeInUp 0.6s ease-out both;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.15s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.25s; }
.card:nth-child(5) { animation-delay: 0.3s; }
.card:nth-child(6) { animation-delay: 0.35s; }

.card:hover {
    border-color: var(--border-hover);
    box-shadow:
        0 4px 16px rgba(44, 36, 22, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.card h2 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--sienna);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--contour-dark);
}

/* === File Upload Zone === */
.file-upload {
    position: relative;
    border: 2px dashed var(--sienna);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-smooth);
    background:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(160, 82, 45, 0.03) 10px,
            rgba(160, 82, 45, 0.03) 20px
        );
}

.file-upload:hover,
.file-upload.highlight {
    border-color: var(--amber);
    border-style: solid;
    background-color: rgba(212, 160, 60, 0.08);
    transform: scale(1.01);
}

.file-upload input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.file-upload label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    pointer-events: none;
}

.file-upload .text {
    color: var(--ink-light);
    font-size: 0.95rem;
}

.file-upload .filename {
    color: var(--sienna);
    font-weight: 600;
    font-size: 1rem;
    font-family: 'IBM Plex Mono', monospace;
}

/* === Presets === */
.preset-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.preset-option {
    cursor: pointer;
}

.preset-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.preset-option span {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    background: var(--parchment);
    border: 1px solid var(--parchment-dark);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink-light);
    transition: all var(--transition-fast);
    text-transform: capitalize;
}

.preset-option:hover span {
    border-color: var(--sienna);
    color: var(--sienna);
    background: rgba(160, 82, 45, 0.05);
}

.preset-option input:checked + span {
    background: linear-gradient(135deg, var(--sienna) 0%, var(--sienna-dark) 100%);
    color: var(--parchment);
    font-weight: 600;
    border-color: var(--sienna-dark);
    box-shadow: 0 2px 8px rgba(160, 82, 45, 0.3);
}

/* === Form Elements === */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group > label:first-child {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--ink);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group > label:first-child small {
    font-weight: 400;
    color: var(--ink-muted);
    font-size: 0.8rem;
}

/* Text Inputs & Selects */
.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--parchment-dark);
    background: var(--parchment-light);
    color: var(--ink);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input[type="text"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--sienna);
    box-shadow: 0 0 0 3px rgba(160, 82, 45, 0.1);
}

.form-group input[type="text"]::placeholder {
    color: var(--ink-muted);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%235c4a32' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-group select option {
    background: var(--parchment-light);
    color: var(--ink);
}

/* Range Sliders */
.form-group input[type="range"] {
    -webkit-appearance: none;
    width: calc(100% - 60px);
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, var(--sage-light), var(--sienna));
    outline: none;
    cursor: pointer;
    vertical-align: middle;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--parchment-light);
    border: 3px solid var(--sienna);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(44, 36, 22, 0.2);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 3px 10px rgba(160, 82, 45, 0.35);
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--parchment-light);
    border: 3px solid var(--sienna);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(44, 36, 22, 0.2);
}

.form-group .value {
    display: inline-block;
    width: 52px;
    text-align: right;
    color: var(--sienna);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: 'IBM Plex Mono', monospace;
    font-variant-numeric: tabular-nums;
}

/* Radio Groups */
.radio-group {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--ink-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.radio-group label:hover {
    color: var(--ink);
    background: rgba(212, 160, 60, 0.1);
}

.radio-group input[type="radio"] {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--ink-muted);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.radio-group input[type="radio"]:checked {
    border-color: var(--sienna);
    background: var(--sienna);
}

.radio-group input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    background: var(--parchment);
    border-radius: 50%;
}

/* Checkboxes */
.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--ink-light);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.checkbox-group label:hover {
    color: var(--ink);
    background: rgba(212, 160, 60, 0.1);
}

.checkbox-group input[type="checkbox"] {
    appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--ink-muted);
    border-radius: 3px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
}

.checkbox-group input[type="checkbox"]:checked {
    border-color: var(--sienna);
    background: var(--sienna);
}

.checkbox-group input[type="checkbox"]:checked::after {
    content: '\2713';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--parchment);
    font-weight: bold;
    font-size: 14px;
}

/* Indented Sections */
.indent {
    padding-left: var(--spacing-lg);
    border-left: 3px solid var(--contour-dark);
    margin-left: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    transition: opacity var(--transition-base), border-color var(--transition-base);
}

/* === Action Button === */
.action {
    text-align: center;
    padding: var(--spacing-lg) 0;
    animation: fadeInUp 0.6s ease-out both;
    animation-delay: 0.4s;
}

.action button {
    padding: 18px 40px;
    font-family: inherit;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--parchment);
    background: linear-gradient(135deg, var(--sienna) 0%, var(--sienna-dark) 100%);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(160, 82, 45, 0.3);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.action button::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent);
    transition: left 0.5s;
}

.action button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(160, 82, 45, 0.4);
}

.action button:hover::after {
    left: 100%;
}

.action button:active {
    transform: translateY(0);
}

.action button:disabled {
    background: var(--parchment-dark);
    color: var(--ink-muted);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.action button:disabled::after {
    display: none;
}

.action button .btn-loading {
    color: var(--parchment);
}

/* === Status Messages === */
.status {
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-md);
    font-size: 0.95rem;
    animation: fadeInUp 0.4s ease-out both;
}

.status.success {
    background: rgba(125, 148, 113, 0.15);
    border: 1px solid var(--sage);
    color: var(--sage);
}

.status.success::before {
    content: '\2713  ';
    font-weight: bold;
}

.status.error {
    background: rgba(196, 120, 90, 0.15);
    border: 1px solid var(--terracotta);
    color: var(--terracotta);
}

.status.error::before {
    content: '\2717  ';
    font-weight: bold;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* === Custom Scrollbar === */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--parchment-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--sienna);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--sienna-dark);
}

/* === Responsive === */
@media (max-width: 768px) {
    .container {
        padding: 30px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    header .subtitle {
        font-size: 0.85rem;
        letter-spacing: 0.08em;
    }

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

    .preset-buttons {
        flex-direction: column;
    }

    .preset-option span {
        text-align: center;
        width: 100%;
    }

    .radio-group {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .action button {
        width: 100%;
        padding: 16px 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .form-group input[type="range"] {
        width: calc(100% - 50px);
    }

    .form-group .value {
        width: 44px;
        font-size: 0.85rem;
    }
}

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

/* === Print Styles === */
@media print {
    body::before,
    body::after {
        display: none;
    }

    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}