@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@600;700&family=JetBrains+Mono:wght@400;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
  /* Terminator palette */
  --bg: #0A0A0A;
  --bg-grad-1: #111111;
  --bg-grad-2: #0A0A0A;
  --surface: #1C1C1C;
  --surface-elevated: #242424;
  --cream: #F1E3C6;
  --tan: #C9AD78;
  --tan-dim: #A08A5E;
  --leather: #4A2C18;
  --leather-dark: #1C1108;
  --red: #FF3B24;
  --chrome: #9AA7AD;
  --chrome-light: #E7EDF0;
  --chrome-dark: #5C666B;
  --text: #F1E3C6;
  --text-dim: #9AA7AD;
  --text-secondary: #6B5D4A;
  --border: rgba(154, 167, 173, 0.12);
  --border-strong: rgba(201, 173, 120, 0.25);
  --field: rgba(255, 255, 255, 0.04);
  --field-border: rgba(154, 167, 173, 0.18);
  --field-focus: rgba(201, 173, 120, 0.3);

  /* Layout */
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);

  /* Typography */
  --font-display: 'Chakra Petch', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(800px 400px at 70% 10%, rgba(201, 173, 120, 0.06), transparent 60%),
    radial-gradient(600px 300px at 10% 90%, rgba(74, 44, 24, 0.08), transparent 50%),
    linear-gradient(180deg, var(--bg-grad-1), var(--bg-grad-2));
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* ── Wrap ── */
.wrap {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

/* ── Back button ── */
.back-btn {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  z-index: 10;
  margin: 0 auto 4px;
  transition: transform 0.15s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}
.back-btn img {
  width: 28px;
  height: 28px;
  opacity: 0.8;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.back-btn::after {
  content: '';
  position: absolute;
  left: 11px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-bottom: 2px solid var(--tan);
  border-left: 2px solid var(--tan);
  transform: translateY(-55%) rotate(45deg);
  opacity: 0.5;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.back-btn:hover {
  border-color: var(--tan);
  box-shadow: 0 4px 20px rgba(201, 173, 120, 0.2);
}
.back-btn:hover img {
  opacity: 1;
  transform: translateX(-2px);
}
.back-btn:hover::after {
  opacity: 1;
  transform: translateY(-55%) rotate(45deg) translateX(-3px);
}
.back-btn:focus-visible {
  outline: 2px solid var(--tan);
  outline-offset: 2px;
}

/* ── Brand ── */
h1.brand {
  margin: 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cream);
}
h1.brand span { color: var(--tan); }

.brand-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.brand-logo img {
  width: 80px;
  height: 80px;
  filter: drop-shadow(0 0 12px rgba(255, 59, 36, 0.25));
}

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cream);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card .icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.card .icon svg {
  width: 100%;
  height: 100%;
}

/* ── Guide text ── */
.guide {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: -6px 0 16px;
  line-height: 1.5;
}
.guide strong { color: var(--tan); font-weight: 600; }

/* ── Labels ── */
label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  margin: 0 0 6px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ── Inputs / Select ── */
input, select {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 14px;
  background: var(--field);
  border: 1px solid var(--field-border);
  border-radius: var(--radius-sm);
  color: var(--cream);
  font-size: 1rem;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input::placeholder { color: var(--text-secondary); }

input:focus, select:focus {
  border-color: var(--tan);
  box-shadow: 0 0 0 3px var(--field-focus);
}

select option { background: var(--surface); color: var(--cream); }

/* ── Buttons ── */
button.btn {
  width: 100%;
  padding: 13px;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--tan), var(--leather));
  color: var(--cream);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.12s ease, filter 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 4px 16px rgba(74, 44, 24, 0.4);
}

button.btn:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 24px rgba(201, 173, 120, 0.3);
}
button.btn:active { transform: scale(0.985); }

/* ── Result ── */
.result {
  margin-top: 16px;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 59, 36, 0.06);
  border: 1px solid rgba(255, 59, 36, 0.18);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
  word-break: break-word;
}

.result .price { color: var(--red); font-weight: 700; }
.result .saving { color: var(--tan); font-weight: 600; }

/* ── Footer ── */
footer {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

/* ══════════════════════════════════════
   LAUNCHER
   ══════════════════════════════════════ */
.launcher {
  max-width: 380px;
  height: 100dvh;
  padding: 20px 0;
  justify-content: center;
}

.launcher .brand-logo {
  margin-bottom: 4px;
}
.launcher .brand-logo img {
  width: 56px;
  height: 56px;
}
.launcher h1.brand {
  font-size: 1.3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.tool {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--cream);
  text-decoration: none;
  text-align: center;
  transition: transform 0.14s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.tool:hover {
  transform: translateY(-2px);
  border-color: var(--tan);
  background: rgba(201, 173, 120, 0.06);
  box-shadow: 0 4px 16px rgba(201, 173, 120, 0.12);
}

.tool:focus-visible {
  outline: 2px solid var(--tan);
  outline-offset: 2px;
}

.tool .tool-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--surface-elevated), #131313);
  border: 1px solid rgba(58, 58, 58, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool .tool-icon svg {
  width: 22px;
  height: 22px;
}

.tool .tool-name {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cream);
  line-height: 1.2;
}

/* ══════════════════════════════════════
   CALCULATOR PAGE
   ══════════════════════════════════════ */
.display {
  background: linear-gradient(135deg, #1a1812, #14120e);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--tan);
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  padding: 18px 16px;
  text-align: right;
  margin-bottom: 16px;
  overflow-x: auto;
  min-height: 68px;
  text-shadow: 0 0 8px rgba(201, 173, 120, 0.3);
  position: relative;
}

.display::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-sm);
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(201, 173, 120, 0.03) 2px,
    rgba(201, 173, 120, 0.03) 4px
  );
  pointer-events: none;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.buttons button {
  padding: 16px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-elevated);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, border-color 0.15s ease;
}

.buttons button:hover {
  background: rgba(201, 173, 120, 0.1);
  border-color: var(--border-strong);
}

.buttons button:active { transform: scale(0.96); }

.buttons .clear {
  color: var(--red);
  border-color: rgba(255, 59, 36, 0.3);
}
.buttons .clear:hover {
  background: rgba(255, 59, 36, 0.1);
  border-color: rgba(255, 59, 36, 0.5);
}

.buttons .equal {
  background: linear-gradient(135deg, var(--red), #C41F0F);
  color: var(--cream);
  border: none;
  font-family: var(--font-display);
  font-size: 1.4rem;
  box-shadow: 0 4px 16px rgba(255, 59, 36, 0.3);
}
.buttons .equal:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 24px rgba(255, 59, 36, 0.4);
}

.buttons .op {
  color: var(--tan);
  border-color: rgba(201, 173, 120, 0.2);
}

/* ══════════════════════════════════════
   SPLASH SCREEN
   ══════════════════════════════════════ */
.splash {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--bg);
  animation: splashIn 0.6s ease-out both;
}

.splash-logo {
  width: 120px;
  height: 120px;
  animation: splashPulse 1.8s ease-in-out both;
}

.splash-text {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cream);
  opacity: 0;
  animation: splashTextIn 0.5s 0.4s ease-out forwards;
}
.splash-text span { color: var(--tan); }

.splash.hide {
  animation: splashOut 0.6s 0.1s ease-in forwards;
}

@keyframes splashIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes splashPulse {
  0% { transform: scale(0.7); opacity: 0; filter: drop-shadow(0 0 0 transparent); }
  40% { transform: scale(1.05); opacity: 1; filter: drop-shadow(0 0 20px rgba(255, 59, 36, 0.35)); }
  60% { transform: scale(1); filter: drop-shadow(0 0 12px rgba(201, 173, 120, 0.25)); }
  100% { transform: scale(1); opacity: 1; filter: drop-shadow(0 0 8px rgba(201, 173, 120, 0.15)); }
}

@keyframes splashTextIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes splashOut {
  from { opacity: 1; }
  to { opacity: 0; pointer-events: none; }
}

/* App reveal */
#app {
  transition: opacity 0.5s ease;
}
#app.show {
  opacity: 1 !important;
}

@media (prefers-reduced-motion: reduce) {
  .splash, .splash-logo, .splash-text {
    animation: none !important;
  }
  .splash-text { opacity: 1; }
  #app { transition: none; }
}

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */
@media (max-width: 560px) {
  body { padding: 16px; }
  .launcher { max-width: 340px; }
  .grid { gap: 8px; }
  .tool { padding: 12px 4px 10px; }
  .tool .tool-icon { width: 36px; height: 36px; }
  .tool .tool-icon svg { width: 18px; height: 18px; }
  .card { padding: 20px; }
}