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

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface-2: #16161f;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(167,139,250,0.35);
  --text: #e8e8f0;
  --text-muted: #6b6b80;
  --text-dim: #42424f;
  --accent: #a78bfa;
  --accent-2: #60a5fa;
  --accent-3: #34d399;
  --danger: #f87171;
  --glow: rgba(167,139,250,0.12);
  --radius: 14px;
  --radius-sm: 8px;
  --font: 'Pretendard', 'Outfit', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

.hidden { display: none !important; }

/* ── Base ───────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 3rem 1rem 6rem;
  position: relative;
  overflow-x: hidden;
}

/* ── Background Glow ────────────────────────────── */
.bg-glow {
  position: fixed;
  top: -20vh;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(ellipse at center, rgba(167,139,250,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── Container ──────────────────────────────────── */
.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ── Header ─────────────────────────────────────── */
.header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #a78bfa, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
  line-height: 1.6;
}

/* ── Input Section ──────────────────────────────── */
.input-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-wrapper { display: flex; flex-direction: column; gap: 0.6rem; }

.input-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: -0.1rem;
}

.input-box-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.code-input {
  width: 100%;
  padding: 1rem 3rem 1rem 1.25rem;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
  letter-spacing: 0.04em;
}

.code-input::placeholder { color: var(--text-dim); font-weight: 400; }

.code-input:focus {
  border-color: rgba(167,139,250,0.5);
  background: var(--surface-2);
  box-shadow: 0 0 0 3px rgba(167,139,250,0.08), inset 0 1px 0 rgba(255,255,255,0.04);
}

.code-input.has-value {
  border-color: rgba(96,165,250,0.3);
}

.code-input.valid { border-color: rgba(52,211,153,0.4); }
.code-input.invalid { border-color: rgba(248,113,113,0.4); }

.clear-btn {
  position: absolute;
  right: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition), color var(--transition), background var(--transition);
  pointer-events: none;
}

.clear-btn.visible {
  opacity: 1;
  pointer-events: all;
}

.clear-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.input-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.25rem;
}

.char-count {
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--text-dim);
  transition: color var(--transition);
}

.char-count.valid { color: var(--accent-3); }
.char-count.invalid { color: var(--danger); }

.input-status {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}

/* ── Result Section ─────────────────────────────── */
.result-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeInUp 0.35s ease both;
}

.result-section.hidden { display: none; }

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.copy-all-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(167,139,250,0.08);
  border: 1px solid rgba(167,139,250,0.2);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.copy-all-btn:hover {
  background: rgba(167,139,250,0.15);
  border-color: rgba(167,139,250,0.4);
  box-shadow: 0 0 12px rgba(167,139,250,0.15);
}

/* ── Cards ───────────────────────────────────────── */
.cards-container {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.3s ease both;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(167,139,250,0.04), rgba(96,165,250,0.04));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before { opacity: 1; }

.card:hover {
  border-color: var(--border-hover);
  background: var(--surface-2);
  transform: translateY(-1px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3), 0 0 0 1px rgba(167,139,250,0.08);
}

.card:active { transform: translateY(0); }

.card.copied {
  border-color: rgba(52,211,153,0.4);
  background: rgba(52,211,153,0.05);
}

.card.copied::before { opacity: 1; background: rgba(52,211,153,0.03); }

.card-index {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.card:last-child .card-index {
  background: linear-gradient(135deg, rgba(167,139,250,0.2), rgba(96,165,250,0.2));
  color: #b8a0fd;
  border: 1px solid rgba(167,139,250,0.25);
}

.card:not(:last-child) .card-index {
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
  min-width: 0;
}

.card-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.card:last-child .card-label { color: rgba(167,139,250,0.6); }

.card-value {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.1em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card:last-child .card-value {
  font-size: 0.92rem;
  color: #c4b5fd;
}

.card-copy-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.8rem;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  white-space: nowrap;
}

.card-copy-btn:hover {
  color: var(--accent);
  border-color: rgba(167,139,250,0.3);
  background: rgba(167,139,250,0.08);
}

.card.copied .card-copy-btn {
  color: var(--accent-3);
  border-color: rgba(52,211,153,0.3);
  background: rgba(52,211,153,0.06);
}

/* ── Empty State ────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem 0;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  transition: opacity var(--transition);
}

.empty-state.hidden { display: none; }

.empty-icon {
  opacity: 0.5;
  animation: float 3s ease-in-out infinite;
}

/* ── Toast ──────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  background: rgba(22, 22, 31, 0.92);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);

  animation: toastIn 0.3s cubic-bezier(0.34,1.56,0.64,1) both;
  pointer-events: none;
}

.toast.out {
  animation: toastOut 0.25s ease forwards;
}

.toast-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-3);
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(52,211,153,0.6);
}

/* ── Animations ─────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(8px) scale(0.95); }
}

/* ── Brand UI Button ──────────────────────── */

.brand-btn {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  background: rgba(167, 139, 250, 0.08);
  border: 1px solid rgba(167, 139, 250, 0.22);
  border-radius: 100px;
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  z-index: 100;
  transition: all var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  letter-spacing: 0.01em;
}

.brand-btn:hover {
  background: rgba(167, 139, 250, 0.16);
  border-color: rgba(167, 139, 250, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(167, 139, 250, 0.15);
  color: #c4b5fd;
}

.brand-icon {
  font-size: 1rem;
  line-height: 1;
}

/* ── Ad Banner ───────────────────────────── */

.ad-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(10, 10, 15, 0.93);
  border-top: 1px solid rgba(167, 139, 250, 0.18);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: slideUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.ad-banner-inner {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  max-width: 760px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
}

.ad-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  flex-shrink: 0;
}

.ad-text {
  flex: 1;
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ad-cta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  padding: 0.35rem 0.85rem;
  border: 1px solid rgba(167, 139, 250, 0.25);
  border-radius: 100px;
  transition: all var(--transition);
}

.ad-cta:hover {
  background: rgba(167, 139, 250, 0.12);
  border-color: rgba(167, 139, 250, 0.4);
  box-shadow: 0 0 10px rgba(167, 139, 250, 0.1);
}

.ad-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
  line-height: 1;
}

.ad-close:hover {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(100%); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ───────────────────────────── */
@media (max-width: 480px) {
  .brand-btn { top: auto; bottom: 3.8rem; right: 1rem; }
  .brand-btn span:last-child { display: none; }
  .brand-btn { padding: 0.55rem 0.8rem; }

  .ad-text { display: none; }
  .ad-banner-inner { justify-content: space-between; }
}