/* ============================================
   az.ia.br — Design System Dark Premium
   Paleta segura WCAG AA conforme Corpo Digital
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- Cascade Layers --- */
@layer reset, base, components, utilities;

/* --- Reset --- */
@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  img, svg { display: block; max-width: 100%; }
  input, button, textarea, select { font: inherit; }
  a { color: inherit; }
}

/* --- Base / Design Tokens --- */
@layer base {
  :root {
    /* Tier 1 — Literais */
    --color-black: #050505;
    --color-dark: #0a0a0a;
    --color-surface: #121212;
    --color-ivory: #f0ead6;
    --color-gold: #c9a227;
    --color-gold-light: #e8c84a;
    --color-muted: #a09080;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);

    /* Accent — identidade do domínio */
    --color-accent: #3498db;
    --color-accent-glow: rgba(52, 152, 219, 0.15);
    --color-accent-subtle: rgba(52, 152, 219, 0.08);

    /* Tier 2 — Semânticos */
    --text-primary: var(--color-ivory);
    --text-secondary: var(--color-muted);
    --text-accent: var(--color-gold);
    --text-highlight: var(--color-gold-light);
    --bg-body: var(--color-black);
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.05);

    /* Tier 3 — UI */
    --ui-border: var(--color-border);
    --ui-border-hover: var(--color-border-hover);
    --ui-radius: 16px;
    --ui-radius-sm: 8px;
    --ui-radius-pill: 100px;

    /* Tipografia */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Espaçamento */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Transições */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;

    /* Dark theme */
    color-scheme: dark;
  }

  html {
    font-family: var(--font-sans);
    font-size: 100%;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    text-rendering: optimizeLegibility;
  }

  body {
    min-height: 100dvh;
    overflow-x: hidden;
    position: relative;
  }

  /* Background: gradiente radial sutil */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
      radial-gradient(ellipse 80% 60% at 50% 0%, var(--color-accent-subtle) 0%, transparent 60%),
      radial-gradient(ellipse 60% 40% at 80% 100%, rgba(201, 162, 39, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }

  /* Typography */
  h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.15;
    text-wrap: balance;
    letter-spacing: -0.02em;
  }

  h1 { font-size: clamp(2.5rem, 1.5rem + 5vw, 5rem); font-weight: 800; }
  h2 { font-size: clamp(1.5rem, 1rem + 2.5vw, 2.5rem); }
  h3 { font-size: clamp(1.125rem, 1rem + 1vw, 1.5rem); }

  p, li {
    text-wrap: pretty;
    max-width: 65ch;
  }

  /* Links inline com sublinhado */
  main a:not([class]) {
    color: var(--text-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--duration-fast) var(--ease-out);
  }
  main a:not([class]):hover {
    color: var(--text-highlight);
  }

  /* Focus visible */
  :focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
    border-radius: var(--ui-radius-sm);
  }
}

/* --- Components --- */
@layer components {

  /* === Layout Container === */
  .container {
    width: 100%;
    max-width: 1100px;
    margin-inline: auto;
    padding-inline: var(--space-lg);
  }

  /* === Header === */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding-block: var(--space-md);
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--ui-border);
    transition: background var(--duration-normal) var(--ease-out);
  }

  .site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    text-decoration: none;
  }

  .site-logo .domain-tld {
    color: var(--text-accent);
  }

  /* === Language Toggle === */
  .lang-toggle {
    display: flex;
    gap: 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-pill);
    padding: 3px;
    min-height: 44px;
    align-items: center;
  }

  .lang-toggle button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    border-radius: var(--ui-radius-pill);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: all var(--duration-fast) var(--ease-out);
    min-width: 44px;
    min-height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .lang-toggle button:hover:not(.active) {
    color: var(--text-primary);
  }

  .lang-toggle button.active {
    background: var(--color-gold);
    color: var(--color-black);
  }

  /* === Hero Section === */
  .hero {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-4xl) var(--space-lg) var(--space-2xl);
    position: relative;
    z-index: 1;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-accent-glow);
    border: 1px solid rgba(52, 152, 219, 0.2);
    border-radius: var(--ui-radius-pill);
    padding: 0.4rem 1.2rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xl);
  }

  .hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse-dot 2s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
  }

  .hero-domain {
    font-size: clamp(3.5rem, 2rem + 8vw, 8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(
      135deg,
      var(--text-primary) 0%,
      var(--color-accent) 50%,
      var(--text-primary) 100%
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 6s ease-in-out infinite;
  }

  @keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
  }

  .hero-tagline {
    font-size: clamp(1.125rem, 0.875rem + 1.5vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 550px;
    margin-inline: auto;
    margin-bottom: var(--space-2xl);
    font-weight: 300;
    line-height: 1.5;
  }

  .hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-gold);
    color: var(--color-black);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.875rem 2rem;
    border-radius: var(--ui-radius-pill);
    text-decoration: none;
    min-height: 44px;
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: 0 4px 20px rgba(201, 162, 39, 0.2);
  }

  .hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 162, 39, 0.3);
    background: var(--color-gold-light);
  }

  .hero-scroll-hint {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.5;
    animation: bounce-hint 2s ease-in-out infinite;
  }

  .hero-scroll-hint svg {
    width: 20px;
    height: 20px;
  }

  @keyframes bounce-hint {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
  }

  /* === Value Proposition Section === */
  .value-section {
    padding: var(--space-4xl) 0;
    position: relative;
    z-index: 1;
  }

  .value-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  @media (min-width: 768px) {
    .value-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  .value-card {
    background: var(--bg-card);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius);
    padding: var(--space-xl);
    transition: all var(--duration-normal) var(--ease-out);
  }

  .value-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--ui-border-hover);
    transform: translateY(-4px);
  }

  .value-card-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: block;
  }

  .value-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
  }

  .value-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
  }

  /* === Section Header === */
  .section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
  }

  .section-header .section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
  }

  .section-header h2 {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
  }

  .section-header p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    max-width: 550px;
    margin-inline: auto;
  }

  /* === Offer / Form Section === */
  .offer-section {
    padding: var(--space-4xl) 0;
    position: relative;
    z-index: 1;
  }

  .offer-card {
    max-width: 560px;
    margin-inline: auto;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius);
    padding: var(--space-2xl);
    box-shadow:
      0 4px 30px rgba(0, 0, 0, 0.3),
      inset 0 1px 0 rgba(255, 255, 255, 0.05);
  }

  .offer-card h2 {
    text-align: center;
    margin-bottom: var(--space-sm);
  }

  .offer-card .offer-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    font-size: 0.9375rem;
  }

  /* Form styles */
  .form-group {
    margin-bottom: var(--space-lg);
  }

  .form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.03em;
  }

  .form-group input,
  .form-group textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--ui-border);
    border-radius: var(--ui-radius-sm);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
    min-height: 44px;
  }

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

  .form-group input::placeholder,
  .form-group textarea::placeholder {
    color: rgba(160, 144, 128, 0.6);
  }

  .form-group input:focus,
  .form-group textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.15);
  }

  .form-group input:user-invalid {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
  }

  /* Form buttons */
  .form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-xl);
  }

  @media (min-width: 640px) {
    .form-actions {
      flex-direction: row;
    }
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--ui-radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    min-height: 44px;
    flex: 1;
    transition: all var(--duration-normal) var(--ease-out);
    text-decoration: none;
  }

  .btn-whatsapp {
    background: #25D366;
    color: #fff;
  }

  .btn-whatsapp:hover {
    background: #20bd5a;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.25);
  }

  .btn-email {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--ui-border);
  }

  .btn-email:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--ui-border-hover);
    transform: translateY(-1px);
  }

  .btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
  }

  /* === Footer === */
  .site-footer {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--ui-border);
    text-align: center;
    position: relative;
    z-index: 1;
  }

  .site-footer p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-inline: auto;
  }

  .footer-agency {
    color: var(--text-secondary);
    font-family: sans-serif;
    font-size: 0.75rem;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
    display: inline-block;
    margin-top: var(--space-sm);
  }

  .footer-agency:hover {
    color: var(--text-highlight);
  }

  /* === Cookie Banner === */
  #cookie-banner {
    position: fixed;
    bottom: 20px;
    right: 20px;
    max-width: 380px;
    background: rgba(15, 15, 15, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 20px;
    z-index: 9999;
    font-size: 0.875rem;
    color: #eee;
    display: none;
    flex-direction: column;
    gap: 16px;
    border-radius: var(--ui-radius);
    border: 1px solid #333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    line-height: 1.5;
  }

  #cookie-banner a {
    color: var(--color-accent);
    text-decoration: underline;
  }

  .cookie-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
  }

  #btn-cookie-reject {
    background: transparent;
    border: 1px solid #555;
    color: #ccc;
    padding: 0.5rem 1.2rem;
    border-radius: var(--ui-radius-sm);
    cursor: pointer;
    font-size: 0.8125rem;
    min-height: 44px;
    min-width: 44px;
    transition: all var(--duration-fast);
  }
  #btn-cookie-reject:hover {
    border-color: #888;
    color: #fff;
  }

  #btn-cookie-accept {
    background: var(--color-gold);
    border: none;
    color: var(--color-black);
    padding: 0.5rem 1.2rem;
    border-radius: var(--ui-radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.8125rem;
    min-height: 44px;
    min-width: 44px;
    transition: all var(--duration-fast);
  }
  #btn-cookie-accept:hover {
    background: var(--color-gold-light);
  }

  /* === Fade-in Animation === */
  .fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger children */
  .fade-in.visible:nth-child(2) { transition-delay: 100ms; }
  .fade-in.visible:nth-child(3) { transition-delay: 200ms; }

  /* === Language Toggle Content === */
  [data-lang="pt"] [data-i18n-en] { display: none; }
  [data-lang="en"] [data-i18n-pt] { display: none; }
}

/* --- Utilities --- */
@layer utilities {
  .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;
  }

  .text-center { text-align: center; }
  .text-accent { color: var(--text-accent); }
  .text-muted { color: var(--text-secondary); }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-domain {
    animation: none;
    background-position: 0% 50%;
  }

  .hero-badge::before {
    animation: none;
  }

  .hero-scroll-hint {
    animation: none;
  }
}