/**
 * RhyRhy English - Core & Mobile-First Base Styles
 */
:root,
[data-theme="dark"] {
  --bg-color: #0F172A;
  --surface-color: #1E293B;
  --surface-color-alt: #334155;
  --surface-border: rgba(255, 255, 255, 0.08);
  --surface-border-hover: rgba(255, 255, 255, 0.16);
  --nav-bg: rgba(15, 23, 42, 0.94);
  --modal-overlay-bg: rgba(15, 23, 42, 0.75);

  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #818CF8;
  --primary-glow: rgba(99, 102, 241, 0.25);

  --accent-emerald: #10B981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;
  --accent-sky: #38BDF8;

  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-subtle: #64748B;

  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Pretendard', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);

  --nav-height: 64px;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-color: #F8FAFC;
  --surface-color: #FFFFFF;
  --surface-color-alt: #F1F5F9;
  --surface-border: rgba(15, 23, 42, 0.09);
  --surface-border-hover: rgba(15, 23, 42, 0.18);
  --nav-bg: rgba(255, 255, 255, 0.94);
  --modal-overlay-bg: rgba(15, 23, 42, 0.45);

  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-dark: #3730A3;
  --primary-light: #6366F1;
  --primary-glow: rgba(79, 70, 229, 0.15);

  --accent-emerald: #059669;
  --accent-emerald-glow: rgba(5, 150, 105, 0.15);
  --accent-amber: #D97706;
  --accent-rose: #E11D48;
  --accent-sky: #0284C7;

  --text-main: #0F172A;
  --text-muted: #475569;
  --text-subtle: #64748B;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);

  color-scheme: light;
}

body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease !important;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  min-height: 100%;
  scrollbar-gutter: stable;
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

/* Safe area insets for mobile notched devices */
body {
  padding-top: env(safe-area-inset-top, 0);
  padding-bottom: env(safe-area-inset-bottom, 0);
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
}

/* Global Container */
.app-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px;
}

/* Typography & Headings */
h1,
h2,
h3,
h4,
h5 {
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-muted);
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #C7D2FE;
}

[data-theme="light"] a:hover {
  color: var(--primary-hover);
}

/* Buttons & Touch Accessibility */
.btn,
button,
a.btn,
[role="button"] {
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  min-width: 44px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Prevent sticky browser focus rings on mouse/touch clicks */
.btn:focus:not(:focus-visible),
button:focus:not(:focus-visible),
a.btn:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

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

/* Reset anchor button visited styling to prevent browser-default purple link text */
a.btn,
a.btn:visited {
  text-decoration: none;
}

.btn-primary,
a.btn-primary,
.btn-primary:visited,
a.btn-primary:visited {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover:not(:disabled),
.btn-primary:focus:not(:disabled),
a.btn-primary:hover,
a.btn-primary:focus {
  color: #FFFFFF !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active:not(:disabled),
a.btn-primary:active {
  color: #FFFFFF !important;
  transform: translateY(0);
}

.btn-secondary,
a.btn-secondary,
.btn-secondary:visited,
a.btn-secondary:visited {
  background-color: var(--surface-color);
  color: var(--text-main) !important;
  border: 1px solid var(--surface-border);
}

.btn-secondary:hover:not(:disabled),
.btn-secondary:focus:not(:disabled),
a.btn-secondary:hover,
a.btn-secondary:focus {
  background-color: var(--surface-color-alt);
  border-color: var(--surface-border-hover);
  color: var(--text-main) !important;
}

.btn-outline,
a.btn-outline,
.btn-outline:visited,
a.btn-outline:visited {
  background-color: transparent;
  color: var(--text-main) !important;
  border: 1px solid var(--surface-border);
}

.btn-outline:hover:not(:disabled),
.btn-outline:focus:not(:disabled),
a.btn-outline:hover,
a.btn-outline:focus {
  background-color: var(--surface-color-alt);
  border-color: var(--primary);
  color: var(--primary) !important;
}

/* Light mode explicit button contrast guarantees */
[data-theme="light"] .btn-primary,
[data-theme="light"] a.btn-primary,
[data-theme="light"] .btn-primary:visited,
[data-theme="light"] a.btn-primary:visited {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px var(--primary-glow);
}

[data-theme="light"] .btn-primary:hover:not(:disabled),
[data-theme="light"] .btn-primary:focus:not(:disabled),
[data-theme="light"] a.btn-primary:hover,
[data-theme="light"] a.btn-primary:focus {
  color: #FFFFFF !important;
  background: linear-gradient(135deg, var(--primary-hover), var(--primary-dark));
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
}

[data-theme="light"] .btn-secondary,
[data-theme="light"] a.btn-secondary,
[data-theme="light"] .btn-secondary:visited,
[data-theme="light"] a.btn-secondary:visited {
  background-color: var(--surface-color);
  color: var(--text-main) !important;
  border-color: var(--surface-border);
}

[data-theme="light"] .btn-secondary:hover:not(:disabled),
[data-theme="light"] .btn-secondary:focus:not(:disabled),
[data-theme="light"] a.btn-secondary:hover,
[data-theme="light"] a.btn-secondary:focus {
  background-color: var(--surface-color-alt);
  color: var(--text-main) !important;
  border-color: var(--surface-border-hover);
}

[data-theme="light"] .btn-outline,
[data-theme="light"] a.btn-outline,
[data-theme="light"] .btn-outline:visited,
[data-theme="light"] a.btn-outline:visited {
  background-color: var(--surface-color);
  color: var(--text-main) !important;
  border-color: var(--surface-border);
}

[data-theme="light"] .btn-outline:hover:not(:disabled),
[data-theme="light"] .btn-outline:focus:not(:disabled),
[data-theme="light"] a.btn-outline:hover,
[data-theme="light"] a.btn-outline:focus {
  background-color: var(--surface-color-alt);
  border-color: var(--primary);
  color: var(--primary) !important;
}

.btn:disabled,
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

[data-theme="light"] .btn:disabled,
[data-theme="light"] button:disabled {
  color: var(--text-subtle) !important;
  opacity: 0.65;
}

.btn-sm {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 0.85rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-primary {
  background: var(--primary-glow);
  color: var(--primary-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

[data-theme="light"] .badge-primary {
  background: rgba(99, 102, 241, 0.12);
  color: #4338CA;
  border-color: rgba(99, 102, 241, 0.32);
}

.badge-emerald {
  background: var(--accent-emerald-glow);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

[data-theme="light"] .badge-emerald {
  background: rgba(16, 185, 129, 0.12);
  color: #065F46;
  border-color: rgba(16, 185, 129, 0.32);
}

.badge-completed {
  background: rgba(16, 185, 129, 0.2);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

[data-theme="light"] .badge-completed {
  background: rgba(16, 185, 129, 0.14);
  color: #047857;
  border-color: rgba(5, 150, 105, 0.35);
}

.badge-past {
  background: rgba(148, 163, 184, 0.18);
  color: #94A3B8;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

[data-theme="light"] .badge-past {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
  border-color: rgba(100, 116, 139, 0.28);
}

.badge-not-started {
  background: rgba(148, 163, 184, 0.14);
  color: #94A3B8;
  border: 1px solid rgba(148, 163, 184, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

[data-theme="light"] .badge-not-started {
  background: rgba(100, 116, 139, 0.1);
  color: #475569;
  border-color: rgba(100, 116, 139, 0.25);
}

.btn-coming-soon,
a.btn-coming-soon,
.btn-coming-soon:visited,
a.btn-coming-soon:visited {
  background: rgba(245, 158, 11, 0.15);
  border: 1.5px solid rgba(245, 158, 11, 0.45);
  color: #FBBF24 !important;
  font-weight: 700;
}

.btn-coming-soon:hover:not(:disabled),
.btn-coming-soon:focus:not(:disabled),
a.btn-coming-soon:hover,
a.btn-coming-soon:focus {
  background: rgba(245, 158, 11, 0.25);
  border-color: #F59E0B;
  color: #FEF3C7 !important;
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.25);
  transform: translateY(-1px);
}

[data-theme="light"] .btn-coming-soon,
[data-theme="light"] a.btn-coming-soon,
[data-theme="light"] .btn-coming-soon:visited,
[data-theme="light"] a.btn-coming-soon:visited {
  background: rgba(217, 119, 6, 0.1);
  border: 1.5px solid rgba(217, 119, 6, 0.35);
  color: #B45309 !important;
}

[data-theme="light"] .btn-coming-soon:hover:not(:disabled),
[data-theme="light"] .btn-coming-soon:focus:not(:disabled),
[data-theme="light"] a.btn-coming-soon:hover,
[data-theme="light"] a.btn-coming-soon:focus {
  background: rgba(217, 119, 6, 0.18);
  border-color: #D97706;
  color: #78350F !important;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.15);
  transform: translateY(-1px);
}

.badge-in-progress {
  background: rgba(99, 102, 241, 0.2);
  color: #818CF8;
  border: 1px solid rgba(99, 102, 241, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

[data-theme="light"] .badge-in-progress {
  background: rgba(79, 70, 229, 0.12);
  color: #4338CA;
  border-color: rgba(79, 70, 229, 0.35);
}

.badge-coming-soon {
  background: rgba(245, 158, 11, 0.2);
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.45);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

[data-theme="light"] .badge-coming-soon {
  background: rgba(217, 119, 6, 0.12);
  color: #B45309;
  border-color: rgba(217, 119, 6, 0.35);
}

.badge-hidden {
  background: rgba(239, 68, 68, 0.2);
  color: #F87171;
  border: 1px solid rgba(239, 68, 68, 0.45);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

[data-theme="light"] .badge-hidden {
  background: rgba(220, 38, 38, 0.12);
  color: #DC2626;
  border-color: rgba(220, 38, 38, 0.35);
}

/* Shake and Fade Keyframes */
@keyframes shakeAnim {

  0%,
  100% {
    transform: translateX(0);
  }

  20%,
  60% {
    transform: translateX(-8px);
  }

  40%,
  80% {
    transform: translateX(8px);
  }
}

@keyframes pulseGlow {

  0%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }

  50% {
    transform: scale(1.06);
    filter: brightness(1.2);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.35s ease forwards;
}

.animate-slide-up {
  animation: slideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Toast Notifications */
.save-toast-notification {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.save-toast-notification.fade-out {
  opacity: 0;
  transform: translateY(-10px);
}

.toast-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.toast-icon.success {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.toast-icon.info {
  background-color: rgba(99, 102, 241, 0.15);
  color: var(--primary-light);
}

.toast-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.toast-sentence {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 260px;
}

@media (max-width: 640px) {
  .save-toast-notification {
    left: 16px;
    right: 16px;
    top: auto;
    bottom: 24px;
    max-width: none;
  }
}