/* cloudflare/pages/src/css/main.css — Obsidian theme tokens, layout, typography (<200 lines) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================
   Design Tokens — Obsidian Minimalist
   ============================ */
:root {
  /* Colors */
  --bg:          #111113;
  --bg-card:     #18181B;
  --bg-elevated: #1F1F23;
  --border:      rgba(255,255,255,0.08);
  --text:        #F4F4F5;
  --text-muted:  #A1A1AA;
  --text-dim:    #71717A;
  --accent:      #A855F7;
  --accent-glow: rgba(168,85,247,0.3);
  --accent-dim:  #7C3AED;
  --success:     #22C55E;
  --warning:     #F59E0B;
  --danger:      #EF4444;
  --info:        #3B82F6;

  /* Spacing */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;
  --sp-4: 16px; --sp-5: 20px; --sp-6: 24px;
  --sp-8: 32px; --sp-10: 40px;

  /* Radius */
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px;

  /* Transition */
  --t-fast: 150ms ease; --t-med: 250ms ease; --t-slow: 400ms ease;

  /* Shadow */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px var(--accent-glow);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: #D8B4FE; }

img { max-width: 100%; display: block; }

/* ============================
   Layout
   ============================ */
.app-shell {
  display: grid;
  grid-template-rows: 60px 1fr;
  min-height: 100vh;
}

.app-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-6);
  width: 100%;
}

/* ============================
   Topbar
   ============================ */
.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-6);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.topbar-brand {
  font-weight: 700;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--accent), #60A5FA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.topbar-nav { display: flex; gap: var(--sp-2); }

.nav-tab {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  font-family: inherit;
}

.nav-tab:hover { background: var(--bg-elevated); color: var(--text); }
.nav-tab.active {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  object-fit: cover;
}

/* ============================
   Auth Screen
   ============================ */
.auth-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  gap: var(--sp-6);
  text-align: center;
}

.auth-logo {
  width: 80px; height: 80px;
  background: var(--accent-glow);
  border-radius: var(--r-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border: 1px solid var(--accent);
}

.auth-title {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-subtitle { color: var(--text-muted); max-width: 400px; }

/* ============================
   Page sections
   ============================ */
.page-section { display: none; }
.page-section.active { display: block; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-6);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: var(--sp-1);
}

/* ============================
   Utilities
   ============================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.mt-4 { margin-top: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); }
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); font-size: 0.875rem; }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-warning { color: var(--warning); }
.mono { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* Selection */
::selection { background: var(--accent-glow); color: var(--text); }