/* ==========================================
   PLEADING SANITY — COSMIC CORE + ACCESSIBILITY v2.2-FINAL
   God Mode Ascension • Evolution, Not Erasure
   Universal Theme • Arron Ready • Fully Accessible
   WCAG 2.1 AA Compliant • Cross-Browser • Production-Ready
   ========================================== */

:root {
  /* 🌟 COLOUR PALETTE — LOCKED IN • CONTRAST-VERIFIED */
  --cyan: #00fff0;
  --cyan-deep: #00c8c0;
  --cyan-glow: rgba(0, 255, 240, 0.6);
  --cyan-bg: rgba(0, 255, 240, 0.08);
  --magenta: #ff00ff;
  --magenta-deep: #c800c8;
  --magenta-glow: rgba(255, 0, 255, 0.6);
  --magenta-bg: rgba(255, 0, 255, 0.08);
  --gold-yellow: #ffd700;
  --gold-deep: #e6b800;
  --gold-glow: rgba(255, 215, 0, 0.6);
  --success: #00ff90;
  --success-bg: rgba(0, 255, 144, 0.1);
  --error: #ff3b5c;
  --error-bg: rgba(255, 59, 92, 0.1);
  --warning: #ffb020;
  --warning-bg: rgba(255, 176, 32, 0.1);

  /* 🌌 COSMIC BACKDROP */
  --deepest: #01030a;
  --deep: #070b20;
  --mid: #0f1638;
  --mid-light: #1a2456;
  --surface: #243070;
  --text-bright: #ffffff;
  --text-soft: #e0e4ff;
  --text-muted: #9098c0;
  --text-dim: #606890;
  --bg-dark: #000000;

  /* ✨ GRADIENTS — SMOOTH • BANDWIDTH-FRIENDLY */
  --nebula-gradient: linear-gradient(135deg, rgba(0,255,240,0.12), rgba(255,0,255,0.12));
  --cosmic-glow: radial-gradient(ellipse at top, rgba(0,255,240,0.15), transparent 60%),
                 radial-gradient(ellipse at bottom, rgba(255,0,255,0.12), transparent 60%);
  --button-gradient: linear-gradient(135deg, var(--cyan-deep), var(--magenta-deep));
  --hero-gradient: linear-gradient(180deg, var(--deepest), var(--deep) 40%, var(--mid));
  --card-gradient: linear-gradient(135deg, rgba(15,22,56,0.8), rgba(36,48,112,0.6));

  /* 📐 SIZING & SPACING — CONSISTENT */
  --nav-height: 70px;
  --section-gap: 4rem;
  --card-radius: 20px;
  --glow-soft: 0 0 15px;
  --glow-medium: 0 0 30px;
  --glow-strong: 0 0 50px;
  --border-thin: 1px solid rgba(255,255,255,0.1);
  --border-focus: 2px solid var(--cyan);

  /* ⚡ MOTION — RESPECTS USER PREFERENCES */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* ==========================================
   BASE RESET & FOUNDATION
   ========================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: var(--nav-height); /* anchor links clear nav */
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--deepest);
  color: var(--text-bright);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   SKIP LINK — KEYBOARD USERS FIRST
   ========================================== */
.skip-link {
  position: absolute;
  top: -50px;
  left: 6px;
  background: var(--cyan);
  color: var(--bg-dark);
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 700;
  z-index: 100000;
  transition: top 0.25s ease;
  box-shadow: 0 0 15px var(--cyan-glow), 0 4px 12px rgba(0,0,0,0.3);
}

.skip-link:focus {
  top: 12px;
}

/* ==========================================
   SCREEN READER ONLY — HIDE VISUALLY
   ========================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ==========================================
   LIVE REGIONS — SCREEN READER ANNOUNCEMENTS
   Hide only dedicated announcers — visible live regions (chat logs,
   feeds, status lines) must stay on screen
   ========================================== */
.live-region {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ==========================================
   COSMIC BACKGROUND — STARS, NEBULA, SHOOTING
   ========================================== */
.cosmic-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--hero-gradient);
}

.stars {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(1px 1px at 20px 30px, #fff, transparent),
    radial-gradient(1px 1px at 40px 70px, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 50px 160px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 90px 40px, #fff, transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(0,255,240,0.7), transparent),
    radial-gradient(2px 2px at 160px 120px, rgba(255,0,255,0.7), transparent);
  background-repeat: repeat;
  background-size: 200px 200px;
  opacity: 0.6;
  animation: starsTwinkle 8s ease-in-out infinite alternate;
}

@keyframes starsTwinkle {
  0% { opacity: 0.4; }
  100% { opacity: 0.8; }
}

.nebula {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(0,255,240,0.08), transparent 50%),
    radial-gradient(ellipse at 80% 30%, rgba(255,0,255,0.06), transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(0,200,192,0.05), transparent 55%);
  animation: nebulaDrift 25s ease-in-out infinite alternate;
}

@keyframes nebulaDrift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(2%, 1%) scale(1.05); }
}

.shooting-star {
  position: absolute;
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  border-radius: 1px;
  filter: blur(0.5px);
  animation: shoot 4s ease-in-out infinite;
}

@keyframes shoot {
  0% { transform: translateX(-150px) translateY(-50px); opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { transform: translateX(150vw) translateY(80px); opacity: 0; }
}

/* ==========================================
   TYPOGRAPHY — MOVEMENT VOICE • SCALEABLE
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-bright);
  margin-bottom: 0.75em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  background: linear-gradient(135deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--cyan);
}

h3 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--magenta);
}

h4 {
  font-size: 1.15rem;
  color: var(--text-bright);
}

p {
  margin-bottom: 1rem;
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 70ch; /* optimal reading length */
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: all var(--transition-normal);
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

a:hover,
a:focus {
  color: var(--magenta);
  text-decoration: underline;
  text-shadow: 0 0 8px var(--magenta-glow);
}

a:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ==========================================
   FOCUS MANAGEMENT — KEYBOARD vs MOUSE
   ========================================== */
.keyboard-user *:focus {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

.mouse-user *:focus {
  outline: 1px solid rgba(0, 255, 240, 0.4);
  outline-offset: 1px;
}

button:focus-visible,
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(0, 255, 240, 0.5);
}

/* ==========================================
   BUTTONS — COSMIC GLOW • CONSISTENT TARGETS
   ========================================== */
.btn,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  min-height: 44px; /* WCAG touch target */
  min-width: 44px;
  font-family: inherit;
}

.btn-primary {
  background: var(--button-gradient);
  color: var(--bg-dark);
  box-shadow: var(--glow-soft) var(--cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-medium) var(--cyan-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--magenta);
  border-color: var(--magenta);
}

.btn-secondary:hover {
  background: var(--magenta-bg);
  box-shadow: inset 0 0 15px var(--magenta-glow);
}

.btn-outline {
  background: transparent;
  color: var(--cyan);
  border-color: var(--cyan);
}

.btn-outline:hover {
  background: var(--cyan-bg);
  box-shadow: inset 0 0 15px var(--cyan-glow);
}

.btn:disabled,
.btn[aria-disabled="true"],
.btn-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

/* ==========================================
   FORM ACCESSIBILITY • CLEAR FEEDBACK
   ========================================== */
label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-soft);
}

input[type="email"],
input[type="text"],
input[type="password"],
input[type="url"],
textarea,
select {
  width: 100%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  padding: 14px 16px;
  font-size: 1rem;
  line-height: 1.5;
  background: rgba(0, 0, 0, 0.5);
  color: var(--text-bright);
  border-radius: 10px;
  transition: all var(--transition-normal);
  font-family: inherit;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 255, 240, 0.35);
  outline: none;
}

input[type="email"]:invalid:not(:placeholder-shown),
input[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(255, 59, 92, 0.3);
}

input[type="email"]:valid:not(:placeholder-shown),
input[aria-invalid="false"] {
  border-color: var(--success);
  box-shadow: 0 0 0 3px rgba(0, 255, 144, 0.3);
}

/* ==========================================
   STATUS MESSAGES — ERROR & SUCCESS
   ========================================== */
.error-message {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 6px;
  background: var(--error-bg);
}

.error-message::before {
  content: "⚠️";
  flex-shrink: 0;
}

.success-message {
  color: var(--success);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 6px;
  background: var(--success-bg);
}

.success-message::before {
  content: "✅";
  flex-shrink: 0;
}

/* ==========================================
   ERROR HANDLER — FULLY INTEGRATED
   ========================================== */
.error-container {
  padding: 2.5rem 2rem;
  text-align: center;
  animation: fadeIn 0.4s ease-out;
  background: var(--error-bg);
  border: 1px solid rgba(255, 59, 92, 0.3);
  border-radius: var(--card-radius);
  margin: 2rem auto;
  max-width: 520px;
}

.error-title {
  font-size: 1.5rem;
  color: var(--error);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.error-description {
  color: var(--text-soft);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.error-actions .btn {
  min-width: 130px;
}

.error-details {
  margin-top: 1.5rem;
  text-align: left;
}

.error-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
  padding: 10px 14px;
  border-radius: 8px;
  transition: background 0.2s;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.error-details summary:hover {
  background: rgba(255, 255, 255, 0.05);
}

.error-details summary::after {
  content: "▼";
  font-size: 0.75rem;
  opacity: 0.5;
  transition: transform 0.2s;
}

.error-details[open] summary::after {
  transform: rotate(180deg);
}

.error-tech-info {
  margin-top: 10px;
  padding: 15px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 10px;
  font-size: 0.85rem;
  font-family: 'Courier New', monospace;
  color: var(--text-muted);
  overflow-x: auto;
}

/* ==========================================
   LOADING STATES
   ========================================== */
.loading {
  position: relative;
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.loading-spinner {
  display: inline-block;
  width: 36px;
  height: 36px;
  border: 3px solid rgba(0, 255, 240, 0.15);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 10px;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================
   CARD COMPONENT — COSMIC STANDARD
   ========================================== */
.cosmic-card {
  background: var(--card-gradient);
  border: var(--border-thin);
  border-radius: var(--card-radius);
  padding: 2rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  backdrop-filter: blur(8px);
}

.cosmic-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-deep);
  box-shadow: 0 0 20px rgba(0, 255, 240, 0.15);
}

.cosmic-card:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 255, 240, 0.3);
}

/* ==========================================
   VIDEO / IFRAME ACCESSIBILITY
   ========================================== */
iframe[src*="youtube"],
iframe[src*="youtu.be"] {
  border: 2px solid transparent;
  transition: border-color 0.25s, box-shadow 0.25s;
  border-radius: 12px;
  overflow: hidden;
}

iframe[src*="youtube"]:focus,
iframe[src*="youtu.be"]:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 255, 240, 0.35);
  outline: none;
}

/* ==========================================
   THEME TOGGLE ACCESSIBILITY
   ========================================== */
.theme-toggle[aria-pressed="true"] {
  background: var(--magenta);
  color: white;
}

.theme-toggle[aria-pressed="false"] {
  background: var(--cyan);
  color: black;
}

/* ==========================================
   TOOLTIP ACCESSIBILITY
   ========================================== */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(aria-label);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.95);
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 1000;
  margin-bottom: 8px;
}

.tooltip:hover::after,
.tooltip:focus::after,
.tooltip:focus-within::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* ==========================================
   MODAL ACCESSIBILITY
   ========================================== */
.modal {
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal[aria-hidden="true"] {
  display: none;
}

.modal[aria-hidden="false"] {
  display: flex;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(8px);
  padding: 1rem;
}

.modal-content {
  background: var(--mid);
  border-radius: var(--card-radius);
  border: var(--border-thin);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }

/* ==========================================
   HIGH CONTRAST MODE — SYSTEM RESPECT
   ========================================== */
@media (prefers-contrast: high) {
  :root {
    --cyan: #00ffff;
    --magenta: #ff00ff;
    --text-bright: #ffffff;
    --bg-dark: #000000;
  }

  * {
    border-width: 2px !important;
  }

  .btn, button, a, input, textarea, select {
    border-style: solid;
  }

  .error-container, .cosmic-card {
    border-width: 3px;
  }

  .loading-spinner {
    border-width: 4px;
  }

  .cosmic-bg, .nebula, .stars {
    display: none; /* pure contrast mode */
  }
}

/* ==========================================
   REDUCED MOTION — RESPECT USER PREFERENCE
   ========================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover, .cosmic-card:hover {
    transform: none;
  }

  .shooting-star, .stars, .nebula {
    animation: none !important;
  }
}

/* ==========================================
   RESPONSIVE — MOBILE FIRST
   ========================================== */
@media (max-width: 640px) {
  :root {
    --section-gap: 2.5rem;
  }

  .error-container {
    padding: 2rem 1.25rem;
    margin: 1rem;
  }

  .error-actions {
    flex-direction: column;
  }

  .error-actions .btn {
    width: 100%;
  }

  .cosmic-card {
    padding: 1.5rem;
  }

  h1 {
    font-size: 2rem;
  }
}