/* ============================================================
   FitTrack — Design System (Material Design 3)
   ------------------------------------------------------------
   Inspirado en Material Design 3 (m3.material.io).
   REGLA DE ORO: todos los valores viven en :root como tokens.
   Para re-tematizar toda la app, edita solo los tokens.
   Se usan roles de color M3 (primary, surface, container...),
   superficies tonales por elevación y state layers.
   ============================================================ */

:root {
    /* ============ PALETA SEMILLA (source) ============ */
    /* Cambia estos HUE/tonos para re-tematizar toda la marca */
    --seed-primary: 235;
    /* matiz azul-índigo */
    --seed-secondary: 150;
    /* matiz verde */
    --seed-tertiary: 30;
    /* matiz ámbar */

    /* ============ ROLES DE COLOR M3 — LIGHT ============ */
    /* Primary */
    --md-primary: #4a5bd4;
    --md-on-primary: #ffffff;
    --md-primary-container: #dfe0ff;
    --md-on-primary-container: #000b5e;

    /* Secondary */
    --md-secondary: #2e7d55;
    --md-on-secondary: #ffffff;
    --md-secondary-container: #b6f2ce;
    --md-on-secondary-container: #002114;

    /* Tertiary (acento / energía) */
    --md-tertiary: #8a5100;
    --md-on-tertiary: #ffffff;
    --md-tertiary-container: #ffddb6;
    --md-on-tertiary-container: #2c1600;

    /* Error */
    --md-error: #ba1a1a;
    --md-on-error: #ffffff;
    --md-error-container: #ffdad6;
    --md-on-error-container: #410002;

    /* Éxito / info (semánticos extra, alineados a M3) */
    --md-success: #2e7d55;
    --md-success-container: #b6f2ce;
    --md-on-success-container: #002114;
    --md-info: #00639c;
    --md-info-container: #cfe5ff;
    --md-on-info-container: #001d32;

    /* Neutros: superficie y texto */
    --md-background: #fbf8ff;
    --md-on-background: #1a1b21;
    --md-surface: #fbf8ff;
    --md-on-surface: #1a1b21;
    --md-on-surface-variant: #46464f;

    /* Superficies tonales por elevación (M3 tone-based) */
    --md-surface-container-lowest: #ffffff;
    --md-surface-container-low: #f4f2fb;
    --md-surface-container: #eeecf6;
    /* corregido abajo por var real */
    --md-surface-container: #edecf5;
    --md-surface-container-high: #e7e6ef;
    --md-surface-container-highest: #e2e0ea;

    /* Contornos */
    --md-outline: #767680;
    --md-outline-variant: #c7c5d0;

    /* Inverse (snackbars, etc.) */
    --md-inverse-surface: #2f3036;
    --md-inverse-on-surface: #f2eff7;

    /* ============ STATE LAYERS (opacidad M3) ============ */
    --state-hover: 0.08;
    --state-focus: 0.10;
    --state-pressed: 0.10;

    /* ============ TIPOGRAFÍA (M3 type scale simplificada) ============ */
    --font-family: 'Roboto', 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-brand: 'Roboto', 'Inter', system-ui, sans-serif;

    --type-display: 2.25rem;
    /* display-small */
    --type-headline: 1.75rem;
    /* headline-small */
    --type-title-lg: 1.375rem;
    /* title-large */
    --type-title: 1rem;
    /* title-medium */
    --type-body-lg: 1rem;
    /* body-large */
    --type-body: 0.875rem;
    /* body-medium */
    --type-label-lg: 0.875rem;
    /* label-large (botones) */
    --type-label: 0.75rem;
    /* label-medium */

    --fw-regular: 400;
    --fw-medium: 500;
    --fw-bold: 700;
    --line-height: 1.5;
    --tracking: 0.1px;

    /* ============ ESPACIADO (grid 4dp de M3) ============ */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;

    /* ============ FORMAS (shape scale M3) ============ */
    --shape-xs: 4px;
    --shape-sm: 8px;
    --shape-md: 12px;
    /* cards */
    --shape-lg: 16px;
    /* cards grandes / dialogs */
    --shape-xl: 28px;
    /* contenedores destacados */
    --shape-full: 9999px;
    /* pills, FAB, chips */

    /* ============ ELEVACIÓN (M3: sombras sutiles) ============ */
    --elevation-0: none;
    --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.30), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
    --elevation-2: 0 1px 2px rgba(0, 0, 0, 0.30), 0 2px 6px 2px rgba(0, 0, 0, 0.15);
    --elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.30);
    --elevation-4: 0 6px 10px 4px rgba(0, 0, 0, 0.15), 0 2px 3px rgba(0, 0, 0, 0.30);

    /* ============ BORDES ============ */
    --border-width: 1px;
    --border-style: solid;

    /* ============ MOVIMIENTO (M3 easing) ============ */
    --easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
    --transition-fast: 150ms var(--easing-standard);
    --transition-base: 250ms var(--easing-standard);
    --transition-slow: 400ms var(--easing-emphasized);

    /* ============ LAYOUT ============ */
    --container-max: 1200px;
    --container-pad: var(--space-5);
    --header-height: 64px;
    --sidebar-width: 260px;
}

/* ============================================================
   TEMA OSCURO — solo se redefinen los roles de color M3.
   Todos los componentes se re-tematizan automáticamente.
   ============================================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --md-primary: #bcc2ff;
        --md-on-primary: #10218b;
        --md-primary-container: #303aa3;
        --md-on-primary-container: #dfe0ff;

        --md-secondary: #9bd6b3;
        --md-on-secondary: #003824;
        --md-secondary-container: #135236;
        --md-on-secondary-container: #b6f2ce;

        --md-tertiary: #ffb95c;
        --md-on-tertiary: #492900;
        --md-tertiary-container: #693c00;
        --md-on-tertiary-container: #ffddb6;

        --md-error: #ffb4ab;
        --md-on-error: #690005;
        --md-error-container: #93000a;
        --md-on-error-container: #ffdad6;

        --md-success: #9bd6b3;
        --md-success-container: #135236;
        --md-on-success-container: #b6f2ce;
        --md-info: #99cbff;
        --md-info-container: #004a77;
        --md-on-info-container: #cfe5ff;

        --md-background: #121318;
        --md-on-background: #e3e1e9;
        --md-surface: #121318;
        --md-on-surface: #e3e1e9;
        --md-on-surface-variant: #c7c5d0;

        --md-surface-container-lowest: #0d0e13;
        --md-surface-container-low: #1a1b21;
        --md-surface-container: #1e1f25;
        --md-surface-container-high: #292a2f;
        --md-surface-container-highest: #34343a;

        --md-outline: #90909a;
        --md-outline-variant: #46464f;

        --md-inverse-surface: #e3e1e9;
        --md-inverse-on-surface: #2f3036;
    }
}

/* ============================================================
   RESET / BASE
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--type-body-lg);
    font-weight: var(--fw-regular);
    line-height: var(--line-height);
    letter-spacing: var(--tracking);
    color: var(--md-on-background);
    background-color: var(--md-background);
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-brand);
    font-weight: var(--fw-medium);
    line-height: 1.25;
    color: var(--md-on-surface);
}

a {
    color: var(--md-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    display: block;
}

/* ============================================================
   LAYOUT / CONTENEDORES
   ============================================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

.container-fluid {
    width: 100%;
    padding-inline: var(--container-pad);
}

.grid {
    display: grid;
    gap: var(--space-5);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-3 {
    gap: var(--space-3);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-5 {
    gap: var(--space-5);
}

/* ============================================================
   CARDS (M3: filled / elevated / outlined)
   ============================================================ */
.card {
    position: relative;
    background: var(--md-surface-container-low);
    border: none;
    border-radius: var(--shape-md);
    padding: var(--space-5);
    color: var(--md-on-surface);
    transition: box-shadow var(--transition-base),
        background var(--transition-base),
        transform var(--transition-base);
}

/* Elevated card: superficie tonal + sombra nivel 1 */
.card-elevated {
    background: var(--md-surface-container-low);
    box-shadow: var(--elevation-1);
}

.card-elevated:hover {
    box-shadow: var(--elevation-2);
}

/* Filled card: superficie tonal, sin sombra */
.card-filled {
    background: var(--md-surface-container-highest);
    box-shadow: var(--elevation-0);
}

/* Outlined card: borde en lugar de elevación */
.card-outlined {
    background: var(--md-surface);
    border: var(--border-width) var(--border-style) var(--md-outline-variant);
}

.card:hover {
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--type-title-lg);
    font-weight: var(--fw-medium);
    color: var(--md-on-surface);
}

.card-subtitle {
    font-size: var(--type-body);
    color: var(--md-on-surface-variant);
}

.card-body {
    color: var(--md-on-surface-variant);
}

.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: var(--border-width) var(--border-style) var(--md-outline-variant);
}

/* Acentos de color en el borde superior (contenedores M3) */
.card-accent {
    border-top: 3px solid var(--md-primary);
}

.card-success {
    border-top: 3px solid var(--md-success);
}

.card-warning {
    border-top: 3px solid var(--md-tertiary);
}

.card-danger {
    border-top: 3px solid var(--md-error);
}

/* ============================================================
   BOTONES (M3: filled, tonal, outlined, text, FAB)
   State layer implementado con ::before + opacidad
   ============================================================ */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    min-height: 40px;
    font-family: inherit;
    font-size: var(--type-label-lg);
    font-weight: var(--fw-medium);
    letter-spacing: 0.1px;
    line-height: 1;
    border: none;
    border-radius: var(--shape-full);
    /* botones M3 = pill */
    cursor: pointer;
    overflow: hidden;
    transition: box-shadow var(--transition-fast),
        background var(--transition-fast);
}

/* State layer genérico */
.btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: currentColor;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.btn:hover::before {
    opacity: var(--state-hover);
}

.btn:focus-visible::before {
    opacity: var(--state-focus);
}

.btn:active::before {
    opacity: var(--state-pressed);
}

.btn:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

/* Filled (primario) */
.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.btn-primary:hover {
    box-shadow: var(--elevation-1);
}

/* Tonal (secundario) */
.btn-secondary {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

/* Outlined */
.btn-outline {
    background: transparent;
    color: var(--md-primary);
    border: var(--border-width) var(--border-style) var(--md-outline);
}

/* Text / Ghost */
.btn-ghost {
    background: transparent;
    color: var(--md-primary);
    padding-inline: var(--space-4);
}

/* Error */
.btn-danger {
    background: var(--md-error);
    color: var(--md-on-error);
}

.btn-danger:hover {
    box-shadow: var(--elevation-1);
}

/* Tamaños */
.btn-sm {
    min-height: 32px;
    padding: var(--space-2) var(--space-4);
}

.btn-lg {
    min-height: 48px;
    padding: var(--space-4) var(--space-6);
    font-size: var(--type-title);
}

.btn-block {
    width: 100%;
}

/* FAB (Floating Action Button) */
.btn-icon {
    padding: var(--space-3);
    min-height: 40px;
    aspect-ratio: 1;
    border-radius: var(--shape-md);
}

.btn-fab {
    min-height: 56px;
    width: 56px;
    padding: 0;
    border-radius: var(--shape-lg);
    background: var(--md-tertiary-container);
    color: var(--md-on-tertiary-container);
    box-shadow: var(--elevation-3);
    font-size: var(--type-title-lg);
}

.btn-fab:hover {
    box-shadow: var(--elevation-4);
}

/* ============================================================
   CHIPS / BADGES (M3 assist/filter chips + badges)
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    min-height: 24px;
    font-size: var(--type-label);
    font-weight: var(--fw-medium);
    border-radius: var(--shape-sm);
    line-height: 1.4;
}

.badge-primary {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.badge-success {
    background: var(--md-success-container);
    color: var(--md-on-success-container);
}

.badge-warning {
    background: var(--md-tertiary-container);
    color: var(--md-on-tertiary-container);
}

.badge-danger {
    background: var(--md-error-container);
    color: var(--md-on-error-container);
}

.badge-info {
    background: var(--md-info-container);
    color: var(--md-on-info-container);
}

.badge-neutral {
    background: var(--md-surface-container-high);
    color: var(--md-on-surface-variant);
}

/* ============================================================
   STATS / MÉTRICAS
   ============================================================ */
.stat {
    background: var(--md-surface-container-low);
    border-radius: var(--shape-md);
    padding: var(--space-5);
    box-shadow: var(--elevation-1);
    transition: box-shadow var(--transition-base);
}

.stat:hover {
    box-shadow: var(--elevation-2);
}

.stat-label {
    font-size: var(--type-body);
    color: var(--md-on-surface-variant);
    font-weight: var(--fw-medium);
}

.stat-value {
    font-size: var(--type-headline);
    font-weight: var(--fw-bold);
    color: var(--md-on-surface);
    margin-top: var(--space-1);
}

.stat-delta {
    font-size: var(--type-body);
    font-weight: var(--fw-medium);
    margin-top: var(--space-2);
}

.stat-delta.up {
    color: var(--md-success);
}

.stat-delta.down {
    color: var(--md-error);
}

/* ============================================================
   BARRAS DE PROGRESO (M3 linear progress)
   ============================================================ */
.progress {
    width: 100%;
    height: 8px;
    background: var(--md-surface-container-highest);
    border-radius: var(--shape-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--md-primary);
    border-radius: var(--shape-full);
    transition: width var(--transition-slow);
}

.progress-bar.success {
    background: var(--md-success);
}

.progress-bar.warning {
    background: var(--md-tertiary);
}

.progress-bar.danger {
    background: var(--md-error);
}

/* ============================================================
   CAMPOS DE TEXTO (M3 filled text field)
   ============================================================ */
.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.field-label {
    font-size: var(--type-body);
    font-weight: var(--fw-medium);
    color: var(--md-on-surface-variant);
}

.input,
.select,
.textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: var(--type-body-lg);
    color: var(--md-on-surface);
    background: var(--md-surface-container-highest);
    border: none;
    border-bottom: 2px solid var(--md-outline);
    border-radius: var(--shape-xs) var(--shape-xs) 0 0;
    transition: border-color var(--transition-fast),
        background var(--transition-fast);
}

.input::placeholder,
.textarea::placeholder {
    color: var(--md-on-surface-variant);
}

.input:focus,
.select:focus,
.textarea:focus {
    outline: none;
    border-bottom-color: var(--md-primary);
    border-bottom-width: 2px;
}

.textarea {
    min-height: 100px;
    resize: vertical;
}

/* ============================================================
   NAVEGACIÓN / TOP APP BAR (M3)
   ============================================================ */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: var(--header-height);
    padding-inline: var(--container-pad);
    background: var(--md-surface);
    color: var(--md-on-surface);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-base), background var(--transition-base);
}

/* Al hacer scroll, la app bar puede elevarse a surface-container */
.navbar-scrolled {
    background: var(--md-surface-container);
    box-shadow: var(--elevation-2);
}

.navbar-brand {
    font-size: var(--type-title-lg);
    font-weight: var(--fw-medium);
    color: var(--md-on-surface);
}

.nav-links {
    display: flex;
    gap: var(--space-2);
}

.nav-link {
    position: relative;
    color: var(--md-on-surface-variant);
    font-weight: var(--fw-medium);
    font-size: var(--type-label-lg);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--shape-full);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
    color: var(--md-on-surface);
    background: var(--md-surface-container-high);
    text-decoration: none;
}

.nav-link.active {
    color: var(--md-on-secondary-container);
    background: var(--md-secondary-container);
}

/* ============================================================
   AVATAR
   ============================================================ */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--shape-full);
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    font-weight: var(--fw-medium);
    font-size: var(--type-body-lg);
}

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--type-title-lg);
}

/* ============================================================
   UTILIDADES
   ============================================================ */
.text-muted {
    color: var(--md-on-surface-variant);
}

.text-primary {
    color: var(--md-primary);
}

.text-success {
    color: var(--md-success);
}

.text-warning {
    color: var(--md-tertiary);
}

.text-danger {
    color: var(--md-error);
}

.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: var(--space-2);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-5 {
    margin-top: var(--space-5);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-5 {
    margin-bottom: var(--space-5);
}

.p-4 {
    padding: var(--space-4);
}

.p-5 {
    padding: var(--space-5);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }
}