@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg-primary: #070b16;
  --bg-secondary: #0d1220;
  --bg-card: #121929;
  --bg-surface: #1a2240;
  --bg-glass: rgba(18,25,41,0.85);

  --accent: #7c5ce7;
  --accent-light: #a89df5;
  --accent-glow: rgba(124,92,231,0.35);
  --gold: #f5c518;
  --gold-glow: rgba(245,197,24,0.4);
  --gem: #e056fd;
  --gem-glow: rgba(224,86,253,0.4);
  --success: #00d2a0;
  --danger: #ff4757;
  --warning: #ffa502;

  --tier-sss: conic-gradient(from 0deg, #ffd700, #ff6b6b, #a855f7, #00d2d3, #ffd700);
  --tier-ss-c: #a855f7;
  --tier-s-c: #ef4444;
  --tier-a-c: #f97316;
  --tier-b-c: #3b82f6;
  --tier-c-c: #22c55e;
  --tier-d-c: #6b7280;

  --elem-fire: #ff6b35;
  --elem-water: #0ea5e9;
  --elem-earth: #84cc16;
  --elem-wind: #67e8f9;
  --elem-light: #fbbf24;
  --elem-dark: #8b5cf6;

  --text: #e2e8f0;
  --text-muted: #64748b;
  --text-accent: #c4b5fd;

  --radius: 12px;
  --radius-lg: 18px;
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ── Starfield BG ── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(124,92,231,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(224,86,253,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 50% 80%, rgba(14,165,233,0.06) 0%, transparent 60%);
  pointer-events: none; z-index: 0;
}

/* ── Login Page ── */
#auth-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px; position: relative; z-index: 1;
  flex-direction: column;
}
.auth-back-row {
  position: absolute; top: 24px; left: 24px; z-index: 10;
}
.auth-back-row .btn {
  font-size: 0.88rem; color: var(--text-muted); border-color: rgba(255,255,255,0.12);
}
.auth-back-row .btn:hover { color: var(--text); border-color: var(--accent); }
.auth-box {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(124,92,231,0.3);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%; max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px var(--accent-glow);
}
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent-light), var(--gem));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.auth-logo p { color: var(--text-muted); font-size: 0.9rem; margin-top: 4px; }
.auth-tabs { display: flex; gap: 4px; margin-bottom: 24px; background: var(--bg-secondary); padding: 4px; border-radius: 8px; }
.auth-tab {
  flex: 1; padding: 8px; border: none; background: transparent;
  color: var(--text-muted); cursor: pointer; border-radius: 6px;
  font-size: 0.9rem; font-weight: 500; font-family: 'Inter', sans-serif;
  transition: var(--transition);
}
.auth-tab.active { background: var(--accent); color: white; }

/* ── Form Elements ── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.form-group input {
  width: 100%; padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  color: var(--text); font-size: 0.95rem; font-family: 'Inter', sans-serif;
  transition: var(--transition);
}
.form-group input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border: none; border-radius: var(--radius);
  font-family: 'Inter', sans-serif; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: var(--transition); text-decoration: none;
  position: relative; overflow: hidden;
}
.btn::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(255,255,255,0); transition: var(--transition);
}
.btn:hover::after { background: rgba(255,255,255,0.08); }
.btn:active { transform: scale(0.97); }

.btn-primary { background: linear-gradient(135deg, var(--accent), #5e3dd4); color: white; box-shadow: 0 4px 20px var(--accent-glow); }
.btn-primary:hover { box-shadow: 0 6px 30px var(--accent-glow); transform: translateY(-1px); }
.btn-gold { background: linear-gradient(135deg, var(--gold), #e6a800); color: #1a1400; box-shadow: 0 4px 20px var(--gold-glow); }
.btn-gold:hover { box-shadow: 0 6px 30px var(--gold-glow); transform: translateY(-1px); }
.btn-danger { background: linear-gradient(135deg, var(--danger), #c0392b); color: white; }
.btn-success { background: linear-gradient(135deg, var(--success), #00a87c); color: white; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid rgba(255,255,255,0.15); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }
.btn-full { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }

/* ── Game Layout ── */
#game-page { display: none; flex-direction: column; min-height: 100vh; position: relative; z-index: 1; }

/* ── Header ── */
.game-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: sticky; top: 0; z-index: 100;
}
.header-brand {
  font-family: 'Outfit', sans-serif; font-weight: 800; font-size: 1.2rem;
  background: linear-gradient(135deg, var(--accent-light), var(--gem));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  display: flex; align-items: center; gap: 8px; text-decoration: none;
}
.header-brand-logo { width: 28px; height: 28px; border-radius: 6px; }
.header-resources { display: flex; gap: 12px; align-items: center; }
.resource-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  background: var(--bg-secondary);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px; font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace; font-weight: 600;
}
.resource-chip.gold { border-color: rgba(245,197,24,0.3); color: var(--gold); }
.resource-chip.gems { border-color: rgba(224,86,253,0.3); color: var(--gem); }
.header-user { display: flex; align-items: center; gap: 10px; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--gem)); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem; }

/* ── Tabs ── */
.tab-bar {
  display: flex; gap: 2px; padding: 8px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow-x: auto;
}
.tab-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 18px; border: none; background: transparent;
  color: var(--text-muted); cursor: pointer; border-radius: 8px;
  font-size: 0.88rem; font-weight: 500; font-family: 'Inter', sans-serif;
  white-space: nowrap; transition: var(--transition);
}
.tab-btn:hover { background: rgba(255,255,255,0.06); color: var(--text); }
.tab-btn.active { background: var(--bg-surface); color: white; box-shadow: inset 0 0 20px var(--accent-glow); }
.tab-btn .tab-icon { font-size: 1.1rem; }

/* ── Tab Content ── */
.tab-content { display: none; padding: 24px; flex: 1; animation: fadeSlideIn 0.3s ease; }
.tab-content.active { display: block; }

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

/* ── Section Headers ── */
.section-title {
  font-family: 'Outfit', sans-serif; font-size: 1.4rem; font-weight: 700;
  margin-bottom: 6px;
}
.section-sub { color: var(--text-muted); font-size: 0.87rem; margin-bottom: 20px; }

/* ── Glass Panel ── */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 20px;
}

/* ── Toast Notifications ── */
#toast-container {
  position: fixed; top: 80px; right: 16px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 9999; pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border-radius: var(--radius); border-left: 3px solid var(--accent);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  font-size: 0.87rem; font-weight: 500;
  animation: toastIn 0.35s ease, toastOut 0.35s ease 2.65s forwards;
  pointer-events: auto; max-width: 300px;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.gold { border-color: var(--gold); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(30px); }
}

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px; width: 90%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
  animation: scaleIn 0.25s cubic-bezier(0.34,1.56,0.64,1);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.error-msg { color: var(--danger); font-size: 0.85rem; margin-top: 8px; min-height: 20px; }

/* ── Loading ── */
.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(124,92,231,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ── */
@media (max-width: 640px) {
  .game-header { padding: 10px 12px; }
  .tab-content { padding: 16px 12px; }
  .header-brand { font-size: 1rem; }
  .resource-chip { padding: 5px 8px; font-size: 0.78rem; }
}