/**
 * Variables CSS base para la nueva identidad visual.
 * Inspirado en la estética de ChatGPT con acentos azul profundo.
 */

/* ESTILOS CRÍTICOS - Prevenir FOUC */
/* Estos estilos deben estar al principio para aplicarse inmediatamente */
body.app-loading {
    overflow: hidden !important;
}

body.app-loading > *:not(#app-loader) {
    visibility: hidden !important;
    opacity: 0 !important;
}

body.app-loading #app-loader {
    position: fixed !important;
    inset: 0 !important;
    background: #f5f7fb !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 99999 !important;
    opacity: 1 !important;
    visibility: visible !important;
}

body.app-loaded #app-loader {
    display: none !important;
}

#app-loader .app-loader__spinner {
    width: 46px !important;
    height: 46px !important;
    border: 3px solid rgba(31, 61, 122, 0.15) !important;
    border-top-color: #1f3d7a !important;
    border-radius: 50% !important;
    animation: app-loader-spin-critical 0.8s linear infinite !important;
}

@keyframes app-loader-spin-critical {
    to { transform: rotate(360deg); }
}

:root {
    /* Colores principales */
    --primary-color: #1f3d7a;
    --primary-hover: #294a91;
    --primary-dark: #102a5a;
    --secondary-color: #2f3f5f;
    --accent-color: #1f3d7a;
    --success-color: #1c8c68;
    --warning-color: #b9770e;
    
    /* Texto */
    --text-color: #1c2333;
    --text-secondary: #4c5875;
    --text-muted: #7b88a6;
    
    /* Fondos */
    --bg-color: #f5f7fb;
    --bg-secondary: #eef1f8;
    --card-bg: #ffffff;
    --surface-elevated: #ffffff;
    --surface-muted: rgba(255, 255, 255, 0.85);
    --input-bg: #ffffff;
    --bg-hover: rgba(31, 61, 122, 0.08);
    --active-bg: rgba(31, 61, 122, 0.16);
    
    /* Bordes y sombras */
    --border-color: rgba(23, 35, 58, 0.12);
    --divider-color: rgba(23, 35, 58, 0.08);
    --border-radius-sm: 10px;
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --shadow: 0 18px 40px rgba(31, 45, 77, 0.08);
    --shadow-hover: 0 22px 48px rgba(31, 45, 77, 0.12);
    
    /* Mensajes del chat */
    --user-msg-bg: rgba(31, 61, 122, 0.1);
    --assistant-msg-bg: rgba(255, 255, 255, 0.9);
    
    /* Espaciado */
    --spacing-xs: 0.35rem;
    --spacing-sm: 0.65rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.25rem;
    --spacing-xxl: 3rem;
    
    /* Tipografía */
    --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.75rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-sidebar: 100;
    --z-header: 90;
    --z-modal: 1000;
    --z-tooltip: 1200;
}

body.app-loading {
    overflow: hidden;
}

body.app-loading .screen,
body.app-loading .login-page {
    opacity: 0;
    pointer-events: none;
}

body.app-loaded .screen,
body.app-loaded .login-page {
    opacity: 1;
    pointer-events: auto;
    transition: opacity var(--transition-base, 0.3s ease);
}

.app-loader {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: var(--bg-color, #f5f7fb);
    color: var(--text-color, #1c2333);
    z-index: calc(var(--z-modal, 1000) + 200);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base, 0.3s ease), visibility var(--transition-base, 0.3s ease);
}

body.app-loading .app-loader {
    opacity: 1;
    visibility: visible;
}

.app-loader__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 2rem;
    border-radius: var(--border-radius, 16px);
    background: var(--card-bg, #fff);
    box-shadow: var(--shadow, 0 18px 40px rgba(31, 45, 77, 0.08));
}

.app-loader__spinner {
    width: 46px;
    height: 46px;
    border: 3px solid rgba(31, 61, 122, 0.15);
    border-top-color: var(--primary-color, #1f3d7a);
    border-radius: 50%;
    animation: app-loader-spin 0.8s linear infinite;
}

.app-loader__content p {
    margin: 0;
    font-weight: 500;
    color: var(--text-secondary, #4c5875);
}

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