/*
 * Main CSS for Vietnam Apps Directory
 * Base styles and component classes
 * Version: 3.0
 *
 * NOTE: All color variables are defined in theme.css (single source of truth).
 * Do NOT add :root color definitions here.
 */

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: #1B3A4B;
  font-weight: var(--font-bold);
  line-height: 1.2;
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* Links */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast) var(--transition-timing);
}

a:hover {
  color: var(--primary-dark);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-medium);
  font-size: var(--text-base);
  line-height: 1.5;
  transition: all var(--transition-normal) var(--transition-timing);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent-gradient);
  color: white;
}

.btn-accent:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

/* Cards */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal) var(--transition-timing);
  overflow: hidden;
}

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

/* Glass Effect */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-4);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast) var(--transition-timing);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Helper Classes - Tailwind-provided utilities removed (flex, gap, margin, padding, etc.)
   These are now handled by Tailwind CSS. Only non-Tailwind helpers remain below. */

.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;
}

/* Hide scrollbar but keep scroll functionality */
.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

/* Ranked row left accent */
.ranked-row::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity 0.15s;
}
.ranked-row:hover::before {
  opacity: 1;
}

/* ═══ Article / Prose Typography ═══ */
.prose {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-dark-400, #374151);
}

.prose > * + * {
  margin-top: 1.5em;
}

/* Headings */
.prose h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-dark, #0F172A);
  margin-top: 2.5em;
  margin-bottom: 0.75em;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-dark, #0F172A);
  margin-top: 2em;
  margin-bottom: 0.75em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid #f1f5f9;
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-dark, #0F172A);
  margin-top: 1.75em;
  margin-bottom: 0.5em;
}

.prose h4 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-dark, #0F172A);
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

/* First heading after article start needs no top margin */
.prose > :first-child {
  margin-top: 0;
}

/* Paragraphs */
.prose p {
  margin-top: 1.25em;
  margin-bottom: 1.25em;
}

.prose p:first-child {
  margin-top: 0;
}

/* Bold & italic */
.prose strong {
  font-weight: 700;
  color: var(--color-dark, #0F172A);
}

.prose em {
  font-style: italic;
}

/* Links */
.prose a {
  color: var(--color-primary, #5BA4B5);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--color-primary-200, #bae0ea);
  transition: text-decoration-color 0.15s;
}

.prose a:hover {
  text-decoration-color: var(--color-primary, #5BA4B5);
}

/* Lists */
.prose ul,
.prose ol {
  margin-top: 1.25em;
  margin-bottom: 1.25em;
  padding-left: 1.75em;
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose li {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
  padding-left: 0.25em;
}

.prose li > p {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

.prose li::marker {
  color: var(--color-primary, #5BA4B5);
}

/* Nested lists */
.prose ul ul,
.prose ol ol,
.prose ul ol,
.prose ol ul {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* Blockquotes */
.prose blockquote {
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  padding: 1em 1.25em;
  border-left: 4px solid var(--color-primary, #5BA4B5);
  background: #f8fafc;
  border-radius: 0 0.5rem 0.5rem 0;
  font-style: italic;
  color: var(--color-dark-300, #475569);
}

.prose blockquote p {
  margin: 0;
}

/* Code */
.prose code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.875em;
  padding: 0.2em 0.4em;
  background: #f1f5f9;
  border-radius: 0.25rem;
  color: var(--color-dark, #0F172A);
}

.prose pre {
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  padding: 1.25em;
  background: #1e293b;
  border-radius: 0.75rem;
  overflow-x: auto;
  line-height: 1.6;
}

.prose pre code {
  font-size: 0.85rem;
  padding: 0;
  background: none;
  border-radius: 0;
  color: #e2e8f0;
}

/* Images */
.prose img {
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  border-radius: 0.75rem;
  max-width: 100%;
  height: auto;
}

/* Horizontal rule */
.prose hr {
  margin-top: 2em;
  margin-bottom: 2em;
  border: none;
  border-top: 1px solid #e2e8f0;
}

/* Tables */
.prose table {
  width: 100%;
  margin-top: 1.5em;
  margin-bottom: 1.5em;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.prose th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--color-dark, #0F172A);
  text-align: left;
  padding: 0.75em 1em;
  border-bottom: 2px solid #e2e8f0;
}

.prose td {
  padding: 0.75em 1em;
  border-bottom: 1px solid #f1f5f9;
}

/* Figcaption */
.prose figcaption {
  margin-top: 0.5em;
  font-size: 0.875rem;
  color: #94a3b8;
  text-align: center;
}