/* ==========================================================================
   Design System & Global Styles - Civictory
   Media Pembelajaran Adaptif (Pendidikan Pancasila SMP)
   Aksesibel WCAG AA, Anti-Slop, Tactile Academic Aesthetic
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;600&display=swap');

:root {
  /* Palet Warna Terkalibrasi: Slate & Teal */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f5f9;
  --color-surface-muted: #e2e8f0;
  --color-border: #cbd5e1;
  --color-border-hover: #94a3b8;

  /* Teks Kontras Tinggi (WCAG AA > 4.5:1 terhadap background) */
  --color-text-primary: #0f172a;    /* Rasio kontras 16.5:1 terhadap #f8fafc */
  --color-text-secondary: #334155;  /* Rasio kontras 9.5:1 terhadap #f8fafc */
  --color-text-muted: #64748b;      /* Rasio kontras 4.6:1 terhadap #f8fafc */

  /* Warna Aksen Terkunci (Teal Akademik) */
  --color-primary: #0f766e;
  --color-primary-hover: #115e59;
  --color-primary-light: #ccfbf1;
  --color-primary-contrast: #ffffff;

  /* Identitas Peran */
  --color-role-siswa: #0284c7;
  --color-role-guru: #7c3aed;

  /* Status UI Fungsional */
  --color-success: #15803d;
  --color-success-bg: #f0fdf4;
  --color-success-border: #bbf7d0;
  
  --color-error: #b91c1c;
  --color-error-bg: #fef2f2;
  --color-error-border: #fecaca;
  
  --color-focus-ring: #0f766e;

  /* Tipografi Modern Terstruktur */
  --font-family-base: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', monospace;

  --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;

  /* Spasi Terstruktur */
  --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;

  /* Radius Skala Konsisten */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-pill: 9999px;

  /* Elevasi Bersih Bertingkat */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-card: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
}

/* Reset & Pengaturan Dasar */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Indikator Fokus Aksesibel */
:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* Kontainer Utama */
.container {
  width: 100%;
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* Header Aplikasi */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.site-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.site-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Area Konten Utama */
.main-content {
  flex: 1;
  padding-top: var(--space-6);
  padding-bottom: var(--space-12);
}

/* Tombol Primer dengan Umpan Balik Taktil */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary-contrast);
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: 44px;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

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

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

/* Tombol Navigasi Topik / Sekunder */
.btn-nav-topic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: 44px;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn-nav-topic:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.btn-nav-topic:active {
  transform: translateY(1px) scale(0.98);
}

/* Form Input */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  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-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
  outline: none;
}

/* Input dengan Ikon Lead & Trail */
.input-with-icon-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.input-icon-lead {
  position: absolute;
  left: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  pointer-events: none;
  z-index: 2;
}

.form-input.has-lead-icon {
  padding-left: 42px;
}

.form-input.has-trail-icon {
  padding-right: 44px;
}

.input-icon-toggle {
  position: absolute;
  right: 6px;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  min-height: 36px;
  min-width: 36px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.input-icon-toggle:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-subtle);
}

/* Tampilan Status (Empty, Loading, Error sesuai R-27) */
.status-box {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: none;
  line-height: 1.4;
}

.status-box.is-visible {
  display: block;
}

.status-box.error {
  background-color: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error);
}

.status-box.info {
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: var(--color-success);
}

/* Footer Aplikasi */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: auto;
}

/* Utilitas Ikon Vektor Bersih (Pengganti Emoji AI Slop) */
.ui-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  vertical-align: middle;
}

.icon-badge {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: all 0.15s ease;
}

.icon-badge-sm {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: var(--color-surface-subtle);
  color: var(--color-primary);
}