/* ============================================================================
    TCHRONOS - Sistema de Diseño
   ============================================================================
    Variables globales, reset, formularios, botones, utilidades y flash.
    Solo lo que carga en TODAS las páginas va aquí.
    Estilos específicos de página → su propio CSS (auth.css, dashboard.css…)
   ============================================================================ */

/* ============================================================================
    1. VARIABLES CSS (Design Tokens)
   ============================================================================ */

:root {
    /* --- Colores institucionales --- */
    --color-primary:       #164DF2;
    --color-primary-hover: #1241D4;
    --color-primary-light: #6B8DF2;
    --color-lavender:      #CED0F2;
    --color-gray-light:    #EBEBF2;
    --color-accent:        #F24405;
    --color-success:       #10B981;
    --color-danger:       #bb1515;

    /* --- Texto --- */
    --color-text:          #1a1a2e;
    --color-text-secondary:#4a4a6a;
    --color-text-muted:    #7a7a9a;
    --color-text-inverse:  #FFFFFF;

    /* --- Fondos --- */
    --bg-gradient: linear-gradient(135deg, #164DF2 0%, #6B8DF2 100%);
    --bg-card:     #FFFFFF;
    --bg-input:    #FFFFFF;

    /* --- Bordes --- */
    --border-color:       #CED0F2;
    --border-color-focus: #164DF2;
    --border-radius-sm:   4px;
    --border-radius-md:   8px;
    --border-radius-lg:   12px;

    /* --- Sombras --- */
    --shadow-sm:    0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md:    0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg:    0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl:    0 20px 40px rgba(0, 0, 0, 0.2);
    --shadow-focus: 0 0 0 3px rgba(22, 77, 242, 0.25);

    /* --- Tipografía --- */
    --font-family:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-xs:   0.75rem;
    --font-size-sm:   0.875rem;
    --font-size-base: 1rem;
    --font-size-lg:   1.125rem;
    --font-size-xl:   1.25rem;
    --font-size-2xl:  1.5rem;
    --font-size-3xl:  2rem;

    /* --- Espaciado (sistema 8px) --- */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.25rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* --- Transiciones --- */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================================================
    2. RESET Y 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: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--bg-gradient);
    min-height: 100vh;
}

/* Páginas admin usan fondo claro en lugar del gradiente */
body.admin {
    background: var(--color-gray-light);
}

/* ============================================================================
    3. FORMULARIOS
   ============================================================================ */

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

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-text);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast),
                box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:hover {
    border-color: var(--color-primary-light);
}

.form-input:focus {
    outline: none;
    border-color: var(--border-color-focus);
    box-shadow: var(--shadow-focus);
}

.form-input.is-error {
    border-color: var(--color-accent);
}

.form-input.is-error:focus {
    box-shadow: 0 0 0 3px rgba(242, 68, 5, 0.25);
}

.form-error {
    display: none;
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin-top: var(--space-2);
}

.form-error.is-visible {
    display: block;
}

/* ============================================================================
    4. CHECKBOX PERSONALIZADO
   ============================================================================ */

.form-checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.form-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-checkbox-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
}

/* ============================================================================
    5. BOTONES
   ============================================================================ */

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    font-family: inherit;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--transition-fast),
                transform var(--transition-fast),
                box-shadow var(--transition-fast);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

/* Primario — sin width:100%, eso va en auth.css */
.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled {
    background: var(--color-lavender);
    cursor: not-allowed;
    transform: none;
}

.btn-primary.is-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-primary.is-loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: var(--color-text-inverse);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Secundario — fondo claro (usado en páginas admin) */
.btn-secondary {
    background: var(--bg-card);
    color: var(--color-text-secondary);
    border: 1px solid var(--border-color);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn-secondary:hover {
    background: var(--color-gray-light);
    color: var(--color-text);
}

.btn-secondary:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

/* Peligro */
.btn-danger {
    background: var(--color-accent);
    color: #fff;
    border: none;
}

.btn-danger:hover {
    background: #c93400;
}

/* Éxito */
.btn-success {
    background: var(--color-success);
    color: #fff;
    border: none;
}

.btn-success:hover {
    background: #0d9668;
}

/* Advertencia */
.btn-warning {
    background: #f59e0b;
    color: #fff;
    border: none;
}

.btn-warning:hover {
    background: #d97706;
}

/* Pequeño */
.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
}

/* ============================================================================
    6. INPUT FIELD (admin forms)
   ============================================================================ */

.input-field {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--bg-input);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-field:focus {
    border-color: var(--border-color-focus);
    box-shadow: var(--shadow-focus);
}

select.input-field {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237a7a9a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* ============================================================================
    7. ALERTAS
   ============================================================================ */

.alert {
    padding: var(--space-4);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-6);
    display: none;
}

.alert.is-visible {
    display: block;
}

.alert-error {
    background: rgba(242, 68, 5, 0.1);
    color: var(--color-accent);
    border: 1px solid rgba(242, 68, 5, 0.2);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ============================================================================
    8. UTILIDADES
   ============================================================================ */

.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); }
.hidden      { display: none; }
.mt-4        { margin-top: var(--space-4); }
.mb-4        { margin-bottom: var(--space-4); }

/* ============================================================================
    9. FLASH MESSAGES
   ============================================================================ */

.flash-container {
    position: fixed;
    top: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    min-width: 320px;
    max-width: 560px;
}

.flash {
    padding: var(--space-3) var(--space-5);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-md);
    animation: flash-in 0.3s ease;
}

.flash--success { background: var(--color-success); color: #fff; }
.flash--error   { background: var(--color-accent);  color: #fff; }
.flash--info    { background: var(--color-primary);  color: #fff; }

@keyframes flash-in {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   CALENDAR PICKER — widget reutilizable (front y admin)
   ============================================================ */

.cp-widget { width: 100%; user-select: none; }

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

.cp-month-label {
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--color-text-main, #1a1a1a);
    flex: 1;
    text-align: center;
}

.cp-nav-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--border-radius-sm, 4px);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    transition: background 0.15s, color 0.15s;
}

.cp-nav-btn:hover {
    background: color-mix(in srgb, var(--color-primary) 10%, transparent);
    color: var(--color-primary);
}

.cp-nav-btn .material-symbols-outlined { font-size: 1.25rem; }

.cp-day-headers {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    margin-bottom: var(--space-1);
}

.cp-day-header {
    text-align: center;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--color-text-muted);
    padding: var(--space-1) 0;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.cp-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.cp-day {
    aspect-ratio: 1;
    border: none;
    background: none;
    font-size: var(--font-size-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    width: 100%;
    color: var(--color-text-main, #1a1a1a);
}

.cp-day--available:hover {
    background: color-mix(in srgb, var(--color-primary) 12%, transparent);
    color: var(--color-primary);
}

.cp-day--today {
    box-shadow: 0 0 0 2px var(--color-primary);
    color: var(--color-primary);
    font-weight: 700;
}

.cp-day--today:hover {
    background: var(--color-primary);
    color: #fff;
}

.cp-day--selected {
    background: var(--color-primary) !important;
    color: #fff !important;
    font-weight: 700;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.cp-day--past    { opacity: 0.3; cursor: not-allowed; }
.cp-day--closed  { opacity: 0.4; cursor: not-allowed; text-decoration: line-through; }
.cp-day--special { opacity: 0.4; cursor: not-allowed; text-decoration: line-through; }

/* Modo popup — trigger */
.cp-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    height: 2.75rem;
}

.cp-trigger-text {
    flex: 1;
    font-size: var(--font-size-base);
    color: var(--color-text-main, #1a1a1a);
}

.cp-trigger:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Dropdown */
.cp-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 200;
    background: var(--color-bg, #fff);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: var(--space-3);
    min-width: 280px;
    animation: cp-drop-in 0.15s ease;
}

@keyframes cp-drop-in {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}