/**
 * 4uonly Music Platform - Design System
 * Truly Mobile-First, Zero-Overflow, Red / Crimson Theme (Default: System, Dark, and Light Modes)
 */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,600&display=swap');

/* Default Theme Tokens (Dark Mode Baseline) */
:root,
[data-theme="dark"] {
  --bg-canvas: #0b0e14;
  --bg-surface-1: #111620;
  --bg-surface-2: #18202c;
  --bg-surface-3: #202b3b;
  --bg-surface-hover: #283548;
  --bg-glass: rgba(17, 22, 32, 0.9);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-focus: #f43f5e;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #ffffff;

  /* Red / Crimson Music Theme */
  --accent-primary: #f43f5e;
  --accent-primary-hover: #e11d48;
  --accent-primary-glow: rgba(244, 63, 94, 0.28);
  --accent-secondary: #38bdf8;
  --accent-warm: #f59e0b;
  --accent-purple: #a855f7;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 20px var(--accent-primary-glow);
  --hero-grad: linear-gradient(180deg, #111620 0%, #0b0e14 100%);
  --input-bg: #18202c;
  --input-text: #f8fafc;
}

/* Light Theme Tokens */
[data-theme="light"] {
  --bg-canvas: #f8fafc;
  --bg-surface-1: #ffffff;
  --bg-surface-2: #f1f5f9;
  --bg-surface-3: #e2e8f0;
  --bg-surface-hover: #cbd5e1;
  --bg-glass: rgba(255, 255, 255, 0.95);

  --border-subtle: rgba(0, 0, 0, 0.09);
  --border-medium: rgba(0, 0, 0, 0.18);
  --border-focus: #e11d48;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-tertiary: #64748b;
  --text-inverse: #ffffff;

  /* Red / Crimson Light Accent */
  --accent-primary: #e11d48;
  --accent-primary-hover: #be123c;
  --accent-primary-glow: rgba(225, 29, 72, 0.2);
  --accent-secondary: #0284c7;
  --accent-warm: #d97706;
  --accent-purple: #9333ea;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px var(--accent-primary-glow);
  --hero-grad: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  --input-bg: #ffffff;
  --input-text: #0f172a;
}

/* Automatic System Preference */
@media (prefers-color-scheme: light) {
  [data-theme="system"] {
    --bg-canvas: #f8fafc;
    --bg-surface-1: #ffffff;
    --bg-surface-2: #f1f5f9;
    --bg-surface-3: #e2e8f0;
    --bg-surface-hover: #cbd5e1;
    --bg-glass: rgba(255, 255, 255, 0.95);

    --border-subtle: rgba(0, 0, 0, 0.09);
    --border-medium: rgba(0, 0, 0, 0.18);
    --border-focus: #e11d48;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;

    --accent-primary: #e11d48;
    --accent-primary-hover: #be123c;
    --accent-primary-glow: rgba(225, 29, 72, 0.2);
    --accent-secondary: #0284c7;
    --accent-warm: #d97706;
    --accent-purple: #9333ea;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
    --hero-grad: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --input-bg: #ffffff;
    --input-text: #0f172a;
  }
}

:root {
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-lyrics: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;

  --sp-2: 2px;
  --sp-4: 4px;
  --sp-6: 6px;
  --sp-8: 8px;
  --sp-12: 12px;
  --sp-16: 16px;
  --sp-20: 20px;
  --sp-24: 24px;
  --sp-32: 32px;
  --sp-40: 40px;
  --sp-48: 48px;
  --sp-64: 64px;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --trans-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-normal: 220ms cubic-bezier(0.4, 0, 0.2, 1);

  --max-width-site: 1320px;
  --max-width-content: 860px;
}

/* Global Reset & Base (Zero-Overflow Guaranteed) */
*, *::before, *::after {
  box-sizing: border-box !important;
}

html, body {
  width: 100%;
  max-width: 100vw;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-canvas) !important;
  color: var(--text-primary);
}

#page, #content, .site-content, .ast-container, .main-header-bar {
  background-color: var(--bg-canvas) !important;
  color: var(--text-primary);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: hidden;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Clear any Astra unwanted gaps */
.entry-content, .site-main, .ast-plain-container.ast-no-sidebar #primary {
  margin: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  width: 100% !important;
  max-width: 100% !important;
  box-sizing: border-box !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-canvas);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-3);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  word-break: break-word;
  overflow-wrap: anywhere;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--trans-fast);
}

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

p {
  color: var(--text-secondary);
  word-break: break-word;
  overflow-wrap: anywhere;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  box-sizing: border-box;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  max-width: 100%;
  box-sizing: border-box;
}

/* Layout Utilities */
.four-container {
  width: 100%;
  max-width: var(--max-width-site);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  box-sizing: border-box;
}

@media (max-width: 640px) {
  .four-container {
    padding-left: 12px !important;
    padding-right: 12px !important;
  }
}

.four-main-content {
  flex: 1 0 auto;
  padding-top: 0;
  padding-bottom: var(--sp-48);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

/* Section Headers */
.four-section {
  margin-bottom: var(--sp-40);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.four-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-16);
  padding-bottom: var(--sp-10);
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--sp-10);
  flex-wrap: wrap;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.four-section-title-wrap {
  display: flex;
  align-items: center;
  gap: var(--sp-10);
  flex: 1 1 auto;
  min-width: 0;
}

.four-section-icon {
  width: 24px;
  height: 24px;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.four-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.four-section-subtitle {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-top: 2px;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.four-section-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: rgba(244, 63, 94, 0.09);
  transition: all var(--trans-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.four-section-link:hover {
  background: var(--accent-primary);
  color: #ffffff;
}

/* Common Buttons */
.four-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--trans-fast);
  max-width: 100%;
  box-sizing: border-box;
}

.four-btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff !important;
  font-weight: 700;
}

.four-btn-primary:hover {
  background-color: var(--accent-primary-hover);
  color: #ffffff !important;
  box-shadow: var(--shadow-glow);
}

.four-btn-secondary {
  background-color: var(--bg-surface-2);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.four-btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.four-btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.four-btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.four-btn-icon:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--bg-surface-hover);
}

/* Badges & Tags */
.four-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.725rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-xs);
  line-height: 1.4;
  white-space: nowrap;
}

.four-badge-primary {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(244, 63, 94, 0.35);
}

.four-badge-cyan {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.four-badge-amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-warm);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Carousels & Horizontal Scroll Containers */
.four-carousel-wrap {
  position: relative;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

.four-carousel {
  display: flex;
  gap: var(--sp-12);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 2px 14px 2px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;
}

.four-carousel::-webkit-scrollbar {
  display: none;
}

.four-carousel > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.four-carousel-controls {
  display: flex;
  gap: var(--sp-6);
  flex-shrink: 0;
}

.four-carousel-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.four-carousel-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Strategic Ad Placement Units (Zero CLS, Zero Overflow) */
.four-ad-slot {
  background: var(--bg-surface-1);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  margin: var(--sp-20) 0;
  padding: var(--sp-12);
  text-align: center;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.four-ad-slot * {
  max-width: 100% !important;
  box-sizing: border-box !important;
}

.four-ad-label {
  font-size: 0.675rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.four-ad-slot-leaderboard {
  min-height: 80px;
}

.four-ad-slot-infeed {
  min-height: 90px;
}

.four-ad-slot-rectangle {
  min-height: 200px;
}

/* Mobile Sticky Bottom Ad Unit */
.four-mobile-sticky-ad {
  display: none;
}

@media (max-width: 768px) {
  .four-mobile-sticky-ad {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 95;
    background: var(--bg-surface-1);
    border-top: 1px solid var(--border-medium);
    padding: 6px 12px;
    align-items: center;
    justify-content: center;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.2);
    max-width: 100vw;
    box-sizing: border-box;
  }
}