/**
 * Design System - Sistema de Agendamento
 * =======================================
 *
 * Base visual minima e performatica.
 * Complementa o CSS existente em base.html.
 *
 * REGRAS:
 * - NAO duplicar classes existentes (.glass, .btn-glass, etc)
 * - Classes .ds-* sao para uso futuro
 * - .glass-light preparado mas NAO aplicado automaticamente
 * - Zero impacto em templates existentes
 */

/* ==========================================================
   1. TOKENS VISUAIS (CSS Variables)
   ========================================================== */

:root {
    /* ========== PALETA DE CORES (AZUL PETRÓLEO) ========== */

    /* Cores Primarias (sky - azul petroleo) */
    --ds-color-primary: #38bdf8;          /* sky-400 */
    --ds-color-primary-light: #7dd3fc;    /* sky-300 */
    --ds-color-primary-dark: #0ea5e9;     /* sky-500 */
    --ds-color-primary-active: #0284c7;   /* sky-600 */

    /* Cores Secundarias */
    --ds-color-secondary: #06b6d4;        /* cyan-500 */
    --ds-color-secondary-light: #22d3ee;  /* cyan-400 */
    --ds-color-secondary-dark: #0891b2;   /* cyan-600 */

    /* Cores de Fundo */
    --ds-color-bg: #0f172a;               /* slate-900 */
    --ds-color-bg-deep: #020617;          /* slate-950 */
    --ds-color-bg-light: #1e293b;         /* slate-800 */
    --ds-color-bg-card: rgba(255, 255, 255, 0.08);
    --ds-color-bg-gradient: linear-gradient(135deg, #0f172a, #020617);

    /* Cores de Texto */
    --ds-color-text: #f8fafc;             /* slate-50 */
    --ds-color-text-muted: #94a3b8;       /* slate-400 */
    --ds-color-text-dark: #1e293b;        /* slate-800 */

    /* Cores de Estado */
    --ds-color-success: #10b981;          /* emerald-500 */
    --ds-color-warning: #f59e0b;          /* amber-500 */
    --ds-color-error: #ef4444;            /* red-500 */
    --ds-color-info: #3b82f6;             /* blue-500 */

    /* Cores de Borda (mais visivel) */
    --ds-color-border: rgba(255, 255, 255, 0.18);
    --ds-color-border-light: rgba(255, 255, 255, 0.25);
    --ds-color-glass-border: rgba(255, 255, 255, 0.18);

    /* ========== TIPOGRAFIA ========== */
    --ds-font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --ds-font-size-xs: 0.75rem;           /* 12px */
    --ds-font-size-sm: 0.875rem;          /* 14px */
    --ds-font-size-base: 1rem;            /* 16px */
    --ds-font-size-lg: 1.125rem;          /* 18px */
    --ds-font-size-xl: 1.25rem;           /* 20px */
    --ds-font-size-2xl: 1.5rem;           /* 24px */
    --ds-font-size-3xl: 1.875rem;         /* 30px */

    /* Pesos */
    --ds-font-weight-normal: 400;
    --ds-font-weight-medium: 500;
    --ds-font-weight-semibold: 600;
    --ds-font-weight-bold: 700;

    /* Line Height */
    --ds-line-height-tight: 1.25;
    --ds-line-height-normal: 1.5;
    --ds-line-height-relaxed: 1.75;

    /* ========== ESPACAMENTOS ========== */
    --ds-space-1: 0.25rem;                /* 4px */
    --ds-space-2: 0.5rem;                 /* 8px */
    --ds-space-3: 0.75rem;                /* 12px */
    --ds-space-4: 1rem;                   /* 16px */
    --ds-space-5: 1.25rem;                /* 20px */
    --ds-space-6: 1.5rem;                 /* 24px */
    --ds-space-8: 2rem;                   /* 32px */
    --ds-space-10: 2.5rem;                /* 40px */
    --ds-space-12: 3rem;                  /* 48px */

    /* ========== BORDER RADIUS ========== */
    --ds-radius-sm: 0.375rem;             /* 6px */
    --ds-radius-base: 0.5rem;             /* 8px */
    --ds-radius-md: 0.75rem;              /* 12px */
    --ds-radius-lg: 1rem;                 /* 16px */
    --ds-radius-xl: 1.5rem;               /* 24px */
    --ds-radius-full: 9999px;

    /* ========== SOMBRAS ========== */
    --ds-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --ds-shadow-base: 0 4px 6px rgba(0, 0, 0, 0.1);
    --ds-shadow-md: 0 8px 16px rgba(0, 0, 0, 0.12);
    --ds-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.15);
    --ds-shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.2);

    /* ========== TRANSICOES ========== */
    --ds-transition-fast: 150ms ease;
    --ds-transition-base: 200ms ease;
    --ds-transition-slow: 300ms ease;

    /* ========== Z-INDEX ========== */
    --ds-z-dropdown: 100;
    --ds-z-modal: 200;
    --ds-z-toast: 300;
}

/* ==========================================================
   2. CLASSES UTILITARIAS BASE (.ds-*)
   ========================================================== */

/* ========== CONTAINER ========== */
.ds-container {
    width: 100%;
    max-width: 80rem;                     /* 1280px */
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--ds-space-4);
    padding-right: var(--ds-space-4);
}

@media (min-width: 640px) {
    .ds-container {
        padding-left: var(--ds-space-6);
        padding-right: var(--ds-space-6);
    }
}

/* ========== CARD ========== */
.ds-card {
    background: var(--ds-color-bg-card);
    border: 1px solid var(--ds-color-border);
    border-radius: var(--ds-radius-lg);
    padding: var(--ds-space-6);
    box-shadow:
        0 10px 25px rgba(0, 0, 0, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: transform var(--ds-transition-base),
                box-shadow var(--ds-transition-base);
}

.ds-card:hover {
    transform: translateY(-2px);
    box-shadow:
        0 15px 35px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* ========== BUTTON ========== */
.ds-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--ds-space-2);
    padding: var(--ds-space-3) var(--ds-space-5);
    font-family: var(--ds-font-family);
    font-size: var(--ds-font-size-sm);
    font-weight: var(--ds-font-weight-semibold);
    line-height: var(--ds-line-height-tight);
    color: #020617;  /* texto escuro para contraste no sky-400 */
    background: var(--ds-color-primary);
    border: none;
    border-radius: var(--ds-radius-md);
    cursor: pointer;
    transition: all var(--ds-transition-fast);
    text-decoration: none;
}

.ds-button:hover {
    background: var(--ds-color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--ds-shadow-base);
}

.ds-button:active {
    background: var(--ds-color-primary-active);
    transform: translateY(0);
}

.ds-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Variantes de botao */
.ds-button--secondary {
    background: var(--ds-color-bg-light);
    border: 1px solid var(--ds-color-border-light);
}

.ds-button--secondary:hover {
    background: var(--ds-color-bg);
    border-color: var(--ds-color-border-light);
}

.ds-button--ghost {
    background: transparent;
    color: var(--ds-color-text-muted);
}

.ds-button--ghost:hover {
    background: var(--ds-color-bg-card);
    color: var(--ds-color-text);
}

/* ========== INPUT ========== */
.ds-input {
    width: 100%;
    padding: var(--ds-space-3) var(--ds-space-4);
    font-family: var(--ds-font-family);
    font-size: var(--ds-font-size-base);
    color: var(--ds-color-text);
    background: var(--ds-color-bg-card);
    border: 1px solid var(--ds-color-border);
    border-radius: var(--ds-radius-base);
    transition: border-color var(--ds-transition-fast),
                box-shadow var(--ds-transition-fast);
}

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

.ds-input:focus {
    outline: none;
    border-color: var(--ds-color-primary);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);  /* sky-400 com transparencia */
}

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

/* ========== BADGE ========== */
.ds-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--ds-space-1) var(--ds-space-3);
    font-size: var(--ds-font-size-xs);
    font-weight: var(--ds-font-weight-medium);
    line-height: var(--ds-line-height-tight);
    color: var(--ds-color-text);
    background: var(--ds-color-bg-light);
    border-radius: var(--ds-radius-full);
}

.ds-badge--success {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

.ds-badge--warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
}

.ds-badge--error {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.ds-badge--info {
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
}

/* ==========================================================
   3. GLASSMORPHISM LEVE (PREPARADO, NAO APLICADO)
   ========================================================== */

/**
 * .glass-light - Efeito de vidro LEVE
 *
 * USO: Adicionar manualmente em componentes que precisam
 * do efeito glass com MENOS impacto em performance.
 *
 * DIFERENCA DO .glass (base.html):
 * - blur: sm (4px) vs blur: 20px
 * - transparencia: 0.06 vs 0.1
 * - sem saturate (melhor performance)
 *
 * QUANDO USAR:
 * - Cards secundarios
 * - Elementos que nao precisam de destaque
 * - Mobile (melhor performance)
 */
.glass-light {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--ds-color-glass-border, rgba(255, 255, 255, 0.18));
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* ==========================================================
   4. UTILITARIOS ADICIONAIS
   ========================================================== */

/* Espacamento */
.ds-mt-4 { margin-top: var(--ds-space-4); }
.ds-mb-4 { margin-bottom: var(--ds-space-4); }
.ds-p-4 { padding: var(--ds-space-4); }

/* Texto */
.ds-text-muted { color: var(--ds-color-text-muted); }
.ds-text-sm { font-size: var(--ds-font-size-sm); }
.ds-font-medium { font-weight: var(--ds-font-weight-medium); }

/* Flex */
.ds-flex { display: flex; }
.ds-items-center { align-items: center; }
.ds-justify-between { justify-content: space-between; }
.ds-gap-2 { gap: var(--ds-space-2); }
.ds-gap-4 { gap: var(--ds-space-4); }

/* Grid */
.ds-grid { display: grid; }
.ds-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.ds-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 640px) {
    .ds-grid-cols-2,
    .ds-grid-cols-3 {
        grid-template-columns: 1fr;
    }
}