/* ============================================================
   MIDNIGHT TUNERS — Premium Glassmorphic Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Exo+2:ital,wght@0,300;0,400;0,600;0,700;1,300&family=Share+Tech+Mono&display=swap');

/* ── CSS Variables ── */
:root {
  --bg-deep:       #020b12;
  --bg-mid:        #061724;
  --cyan:          #00e5ff;
  --cyan-dim:      rgba(0,229,255,0.15);
  --cyan-glow:     rgba(0,229,255,0.5);
  --pink:          #ff2d6f;
  --pink-dim:      rgba(255,45,111,0.15);
  --gold:          #ffc845;
  --glass-bg:      rgba(255,255,255,0.04);
  --glass-border:  rgba(0,229,255,0.18);
  --glass-border2: rgba(255,255,255,0.08);
  --text-primary:  #eaf6ff;
  --text-muted:    rgba(200,230,245,0.55);
  --nav-h:         62px;
  --radius-sm:     8px;
  --radius-md:     14px;
  --radius-lg:     20px;
  --font-display:  'Rajdhani', sans-serif;
  --font-body:     'Exo 2', sans-serif;
  --font-mono:     'Share Tech Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Animated grid background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
  animation: gridDrift 20s linear infinite;
}
@keyframes gridDrift {
  from { background-position: 0 0; }
  to   { background-position: 44px 44px; }
}

/* scanline overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.06) 2px,
    rgba(0,0,0,0.06) 4px
  );
  pointer-events: none;
  z-index: 0;
}

/* ── Page wrapper for z-index layering ── */
body > * { position: relative; z-index: 1; }

/* ── Typography ── */
h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: 0.05em; }
h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; }
h2 { font-size: clamp(1.1rem, 3vw, 1.5rem); font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }
p, li, label, input, textarea, select { font-size: 0.92rem; line-height: 1.6; }

/* ── Page Title Banner ── */
#title {
  background: linear-gradient(90deg, rgba(0,229,255,0.12) 0%, rgba(0,229,255,0.04) 100%);
  border-bottom: 1px solid var(--glass-border);
  color: var(--cyan);
  text-align: center;
  padding: 10px 16px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

/* ── Header / Nav ── */
header {
  background: rgba(2, 11, 18, 0.7);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 40px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

#navigation {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

#navigation a {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 14px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0;
  margin: 0;
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
}

#navigation a:hover,
#navigation a.active {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--cyan-glow), 0 0 8px var(--cyan-glow);
}

/* ── Main Content Wrapper ── */
.wrap {
  max-width: 720px;
  margin: 32px auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Glass Card ── */
.card, #sub, section.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.06);
  transition: box-shadow 0.3s ease;
}

.card:hover, #sub:hover {
  box-shadow:
    0 8px 40px rgba(0,0,0,0.5),
    0 0 24px rgba(0,229,255,0.08),
    inset 0 1px 0 rgba(255,255,255,0.08);
}

/* ── Buttons ── */
.btn, .main-btn, button[onclick], #calculate {
  background: linear-gradient(135deg, rgba(0,229,255,0.18) 0%, rgba(0,229,255,0.06) 100%);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-sm);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 22px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.btn:hover, .main-btn:hover, button[onclick]:hover, #calculate:hover {
  background: rgba(0,229,255,0.28);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-1px);
  color: #fff;
}

.btn:disabled, .main-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn.gray {
  border-color: rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.04);
}

/* Pink / danger variant */
#ai-chat button {
  background: linear-gradient(135deg, rgba(255,45,111,0.2) 0%, rgba(255,45,111,0.06) 100%);
  border-color: var(--pink);
  color: var(--pink);
}
#ai-chat button:hover {
  background: rgba(255,45,111,0.3);
  box-shadow: 0 0 20px rgba(255,45,111,0.5);
}

/* ── Form Inputs ── */
input[type="text"],
input[type="number"],
textarea,
select,
#userInput {
  width: 100%;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--glass-border2);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus,
#userInput:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.12);
}

select option {
  background: var(--bg-mid);
  color: var(--text-primary);
}

label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
  margin-top: 14px;
}

.input-box { margin-bottom: 4px; }

/* ── Anchors (non-nav) ── */
a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: #fff; }

/* ── Result text ── */
#core-results, #wr-results, #boost-results, #g-results,
#dt-results, #tire-results, #gear-results, #fuel-results,
#mod-results {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  background: rgba(0,229,255,0.04);
  border: 1px solid rgba(0,229,255,0.15);
  border-radius: var(--radius-sm);
  padding: 14px;
  white-space: pre-line;
  line-height: 1.8;
  margin-top: 14px;
}

#result {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan) !important;
  text-align: center;
  letter-spacing: 0.05em;
  margin-top: 20px;
}

/* ── AI Chat ── */
#ai-chat {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(16px);
  max-width: 720px;
  margin: 32px auto;
}

#ai-chat h2 {
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

#ai-chat h2::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 22px;
  background: var(--cyan);
  border-radius: 3px;
  box-shadow: 0 0 12px var(--cyan);
}

#chatOutput {
  max-height: 320px;
  overflow-y: auto;
  margin-bottom: 16px;
  padding: 12px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--glass-border2);
  border-radius: var(--radius-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-dim) transparent;
}

#chatOutput p { 
  padding: 8px 12px; 
  border-radius: 8px; 
  margin-bottom: 8px; 
  font-size: 0.9rem;
  line-height: 1.5;
}

#chatOutput p strong:first-child { color: var(--cyan); font-family: var(--font-display); }
#chatOutput p:nth-child(even) { background: rgba(0,229,255,0.04); }

#ai-chat textarea {
  min-height: 80px;
  resize: none;
}

#ai-chat > text {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-style: italic;
  display: block;
  margin-top: 10px;
  text-align: center;
}

/* ── Feed / Social ── */
.right {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(0,0,0,0.25);
  border-bottom: 1px solid var(--glass-border2);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  flex: 0 0 40px;
  object-fit: cover;
}

.meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin-top: 10px;
  border: 1px solid var(--glass-border);
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.hide { display: none !important; }

/* ── Sound / Learn Cards (grid items) ── */
#sub {
  margin-top: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px;
  cursor: default;
}

#sub h7, #sub text {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  display: block;
}

#sub img { border-radius: var(--radius-sm); transition: transform 0.25s; }
#sub:hover img { transform: scale(1.04); }

a#sub {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

/* ── Index / Login ── */
#container {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  width: clamp(280px, 90vw, 360px);
  text-align: center;
  backdrop-filter: blur(20px);
  box-shadow:
    0 0 60px rgba(0,229,255,0.12),
    inset 0 1px 0 rgba(255,255,255,0.06);
  animation: fadeUp 0.8s ease-out both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

#googleBtn {
  display: block;
  width: 100%;
  padding: 13px;
  margin: 10px 0;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  cursor: pointer;
  text-decoration: none;
  color: white;
  background: linear-gradient(90deg, #4285F4, #34A853, #FBBC05, #EA4335);
  background-size: 300%;
  animation: gradShift 5s linear infinite;
  transition: transform 0.2s, box-shadow 0.2s;
}

#googleBtn:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 20px rgba(66,133,244,0.4);
}

@keyframes gradShift {
  0%   { background-position: 0% 50%; }
  100% { background-position: 300% 50%; }
}

#signOutBtn {
  display: none;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--glass-border2);
  color: var(--text-muted);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-top: 10px;
  text-align: center;
  width: 100%;
  cursor: pointer;
  font-family: var(--font-body);
}

#start {
  display: none;
  background: linear-gradient(135deg, rgba(0,229,255,0.2), rgba(0,229,255,0.06));
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: 13px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  margin-top: 10px;
  text-align: center;
  width: 100%;
  text-transform: uppercase;
  transition: all 0.2s;
}

#start:hover {
  background: rgba(0,229,255,0.28);
  box-shadow: 0 0 20px var(--cyan-glow);
}

#status {
  margin-top: 16px;
  font-size: 0.8rem;
  color: rgba(0,229,255,0.7);
  font-family: var(--font-mono);
}

/* ── Photo glow ── */
.photo {
  animation: photoGlow 2.5s ease-in-out infinite alternate;
  border-radius: var(--radius-sm);
}

@keyframes photoGlow {
  from { filter: drop-shadow(0 0 4px rgba(255,45,111,0.4)); }
  to   { filter: drop-shadow(0 0 18px rgba(255,45,111,0.9)); }
}

/* ── Canvas (chart) ── */
#valueChart {
  margin-top: 20px;
  border-radius: var(--radius-sm);
}

/* ── Car image ── */
#carImage {
  width: 55%;
  margin-top: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  display: none;
  align-self: center;
  box-shadow: 0 0 30px rgba(0,229,255,0.15);
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 20px;
  margin-top: 40px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--glass-border2);
  letter-spacing: 0.08em;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan-dim); }

/* ── Utility: glow text ── */
.glow-cyan { color: var(--cyan); text-shadow: 0 0 12px var(--cyan); }
.glow-pink  { color: var(--pink); text-shadow: 0 0 12px var(--pink); }

/* ── Responsive ── */
@media (max-width: 480px) {
  .wrap { margin: 16px auto; }
  #container { padding: 32px 20px; }
  #navigation a { width: 36px; height: 36px; font-size: 12px; }
}