/**
 * SISTEMA DE DESIGN - PAPO REDAÇÃO
 * Paleta customizada, tokens e variáveis semânticas
 * Diferenciação visual e identidade de marca
 */

:root {
    /* =====================================================
       PALETA DE CORES CUSTOMIZADA - PAPO REDAÇÃO (conforme PRD)
       ===================================================== */
    
    /* Cores primárias - Índigo (Confiança, Educação) */
    --color-primary-50: #EEF2FF;
    --color-primary-100: #E0E7FF;
    --color-primary-200: #C7D2FE;
    --color-primary-300: #A5B4FC;
    --color-primary-400: #818CF8;
    --color-primary-500: #4F46E5;   /* Principal (Índigo) */
    --color-primary-600: #4338CA;
    --color-primary-700: #3730A3;
    --color-primary-800: #312E81;
    --color-primary-900: #1E1B4B;

    /* Cores secundárias - Verde (Sucesso, Evolução) */
    --color-secondary-50: #ECFDF5;
    --color-secondary-100: #D1FAE5;
    --color-secondary-200: #A7F3D0;
    --color-secondary-300: #6EE7B7;
    --color-secondary-400: #34D399;
    --color-secondary-500: #10B981;  /* Secundária (Verde) */
    --color-secondary-600: #059669;
    --color-secondary-700: #047857;
    --color-secondary-800: #065F46;
    --color-secondary-900: #064E3B;

    /* Neutros - Escala de Cinza (conforme PRD) */
    --color-neutral-50: #F9FAFB;
    --color-neutral-100: #F3F4F6;
    --color-neutral-200: #E5E7EB;
    --color-neutral-300: #D1D5DB;
    --color-neutral-400: #9CA3AF;
    --color-neutral-500: #6B7280;
    --color-neutral-600: #4B5563;
    --color-neutral-700: #374151;
    --color-neutral-800: #1F2937;
    --color-neutral-900: #111827;   /* Texto principal escuro */

    /* Cores semânticas - Feedback (conforme PRD) */
    --color-success: #10B981;    /* Verde */
    --color-success-light: #34D399;
    --color-success-dark: #059669;
    
    --color-warning: #F59E0B;    /* Âmbar/Alerta */
    --color-warning-light: #FBBF24;
    --color-warning-dark: #D97706;
    
    --color-error: #EF4444;      /* Vermelho/Erro */
    --color-error-light: #F87171;
    --color-error-dark: #DC2626;
    
    --color-info: #4F46E5;       /* Índigo (mesma cor primária) */
    --color-info-light: #818CF8;
    --color-info-dark: #3730A3;

    /* =====================================================
       TIPOGRAFIA
       ===================================================== */
    
    /* Família de fontes */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-mono: 'Menlo', 'Monaco', 'Courier New', monospace;

    /* Tamanhos de fonte - Escala modular (1.250 - Major Third) */
    --text-xs: 0.64rem;      /* 10.24px */
    --text-sm: 0.8rem;       /* 12.8px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.25rem;      /* 20px */
    --text-xl: 1.563rem;     /* 25px */
    --text-2xl: 1.953rem;    /* 31.25px */
    --text-3xl: 2.441rem;    /* 39px */
    --text-4xl: 3.052rem;    /* 48.83px */
    --text-5xl: 3.815rem;    /* 61px */

    /* Pesos de fonte */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;

    /* Line heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* =====================================================
       ESPAÇAMENTO - Sistema de 4pt/8pt
       ===================================================== */
    
    --space-0: 0;
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
    --space-24: 6rem;      /* 96px */

    /* =====================================================
       BORDER RADIUS - Arredondamento
       ===================================================== */
    
    --radius-none: 0;
    --radius-sm: 0.125rem;    /* 2px */
    --radius-base: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;    /* 6px */
    --radius-lg: 0.5rem;      /* 8px */
    --radius-xl: 0.75rem;     /* 12px */
    --radius-2xl: 1rem;       /* 16px */
    --radius-3xl: 1.5rem;     /* 24px */
    --radius-full: 9999px;

    /* =====================================================
       SOMBRAS - Elevação e profundidade
       ===================================================== */
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-2xl: 0 50px 100px -20px rgba(0, 0, 0, 0.35);
    
    /* Sombras com cor da marca */
    --shadow-brand: 0 4px 15px rgba(56, 161, 196, 0.4);
    --shadow-brand-lg: 0 8px 24px rgba(56, 161, 196, 0.35);

    /* =====================================================
       ANIMAÇÕES E TRANSIÇÕES
       ===================================================== */
    
    /* Durações */
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 350ms;
    --duration-slower: 500ms;

    /* Easing curves */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-sharp: cubic-bezier(0.4, 0, 0.6, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* =====================================================
       TOKENS SEMÂNTICOS - Aplicação específica
       ===================================================== */
    
    /* Backgrounds */
    --bg-page: var(--color-neutral-950);
    --bg-surface: var(--color-neutral-900);
    --bg-surface-elevated: var(--color-neutral-800);
    --bg-overlay: rgba(10, 14, 20, 0.95);

    /* Textos */
    --text-primary: #f0f4f8;
    --text-secondary: #b8c5d6;
    --text-tertiary: #8896ab;
    --text-disabled: #5c6b87;
    --text-on-primary: #ffffff;

    /* Bordas */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-strong: rgba(255, 255, 255, 0.2);
    --border-color-brand: rgba(56, 161, 196, 0.3);

    /* Interativos */
    --interactive-hover: rgba(56, 161, 196, 0.1);
    --interactive-active: rgba(56, 161, 196, 0.2);
    --interactive-focus: var(--color-primary-500);

    /* =====================================================
       COMPONENTES - Tamanhos padrão
       ===================================================== */
    
    /* Header */
    --header-height: 80px;
    --header-height-mobile: 64px;

    /* Inputs */
    --input-height: 44px;       /* Mínimo para touch targets */
    --input-padding-x: 1rem;
    --input-padding-y: 0.75rem;
    --input-border-width: 1px;
    --input-border-radius: var(--radius-lg);

    /* Buttons */
    --button-height: 44px;      /* Mínimo WCAG para touch targets */
    --button-padding-x: 1.5rem;
    --button-padding-y: 0.75rem;
    --button-border-radius: var(--radius-lg);

    /* Cards */
    --card-padding: var(--space-6);
    --card-border-radius: var(--radius-xl);
    --card-border-width: 1px;

    /* Modals */
    --modal-max-width: 580px;
    --modal-border-radius: var(--radius-2xl);
    --modal-padding: var(--space-6);

    /* =====================================================
       Z-INDEX SCALE - Organização de camadas
       ===================================================== */
    
    --z-base: 0;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;
    --z-notification: 80;
    --z-max: 9999;

    /* =====================================================
       BREAKPOINTS - Responsive
       ===================================================== */
    
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* =====================================================
       GRADIENTES CUSTOMIZADOS
       ===================================================== */
    
    --gradient-brand: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-500) 50%, var(--color-primary-400) 100%);
    --gradient-success: linear-gradient(135deg, var(--color-secondary-600) 0%, var(--color-secondary-500) 100%);
    --gradient-text-brand: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
    --gradient-surface: linear-gradient(145deg, rgba(21, 27, 38, 0.98), rgba(31, 41, 55, 0.98));
    --gradient-overlay: linear-gradient(135deg, rgba(10, 14, 20, 0.95), rgba(21, 27, 38, 0.98));

    /* =====================================================
       EFEITOS ESPECIAIS
       ===================================================== */
    
    /* Glassmorphism */
    --glass-background: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: 12px;

    /* Backdrop filters */
    --backdrop-blur-sm: blur(4px);
    --backdrop-blur-base: blur(8px);
    --backdrop-blur-lg: blur(12px);
    --backdrop-blur-xl: blur(16px);

    /* =====================================================
       CLASSES UTILITÁRIAS - Design System
       ===================================================== */
}

/* Aplicação de variáveis semânticas aos elementos base */
body {
    font-family: var(--font-sans);
    background: var(--bg-page);
    color: var(--text-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
}

/* Tipografia responsiva com clamp() */
h1 {
    font-size: clamp(2rem, 5vw, var(--text-4xl));
    font-weight: var(--font-weight-black);
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.5rem, 4vw, var(--text-3xl));
    font-weight: var(--font-weight-extrabold);
    line-height: var(--leading-tight);
}

h3 {
    font-size: clamp(1.25rem, 3vw, var(--text-2xl));
    font-weight: var(--font-weight-bold);
    line-height: var(--leading-snug);
}

/* Botões com design system */
.btn-primary {
    background: var(--gradient-brand);
    color: var(--text-on-primary);
    padding: var(--button-padding-y) var(--button-padding-x);
    border-radius: var(--button-border-radius);
    border: none;
    font-weight: var(--font-weight-bold);
    font-size: var(--text-base);
    cursor: pointer;
    min-height: var(--button-height);
    box-shadow: var(--shadow-brand);
    transition: transform var(--duration-base) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-brand-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

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

/* Cards com design system */
.card {
    background: var(--bg-surface);
    border: var(--card-border-width) solid var(--border-color);
    border-radius: var(--card-border-radius);
    padding: var(--card-padding);
    box-shadow: var(--shadow-base);
    transition: transform var(--duration-base) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Inputs com design system */
.input {
    width: 100%;
    min-height: var(--input-height);
    padding: var(--input-padding-y) var(--input-padding-x);
    background: var(--glass-background);
    border: var(--input-border-width) solid var(--border-color);
    border-radius: var(--input-border-radius);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.input:focus {
    outline: none;
    border-color: var(--interactive-focus);
    box-shadow: 0 0 0 3px rgba(56, 161, 196, 0.1);
}

.input:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
}

.input:valid:not(:placeholder-shown) {
    border-color: var(--color-success);
}

/* Gradientes de texto */
.text-gradient-brand {
    background: var(--gradient-text-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Estados de hover para acessibilidade */
.interactive {
    transition: color var(--duration-fast) var(--ease-out),
                background-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

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

.interactive:active {
    background-color: var(--interactive-active);
}

/* Focus visible para navegação por teclado */
*:focus-visible {
    outline: 2px solid var(--interactive-focus);
    outline-offset: 2px;
}

/* Remover outline para navegação por mouse */
*:focus:not(:focus-visible) {
    outline: none;
}

/* =====================================================
   MOTION - Preferências de acessibilidade
   ===================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* =====================================================
   UTILITÁRIOS
   ===================================================== */

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Truncate text */
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Container responsivo */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}