/* ================================
   GRAΦX — Engineering Graph Maker
   ================================ */

:root {
  --accent: #00e5ff;
  --accent2: #ff6b35;
  --font-display: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

[data-theme="dark"] {
  --bg: #0d0d0f;
  --bg2: #131316;
  --bg3: #1a1a1f;
  --border: #2a2a35;
  --text: #e8e8f0;
  --text2: #888898;
  --card: #16161c;
}

[data-theme="light"] {
  --bg: #f5f5f8;
  --bg2: #ffffff;
  --bg3: #ececf0;
  --border: #dddde8;
  --text: #1a1a2e;
  --text2: #666680;
  --card: #ffffff;
}

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

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* ---- NAVBAR ---- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -1px;
}

.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-user {
  font-size: 0.8rem;
  color: var(--text2);
  padding-right: 8px;
  border-right: 1px solid var(--border);
}

.nav-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text2);
  border: 1px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
  background: none;
}

.nav-btn:hover { color: var(--text); border-color: var(--border); }

.nav-btn.primary {
  background: var(--accent);
  color: #000;
  font-weight: 500;
  border-color: var(--accent);
}

.nav-btn.primary:hover { opacity: 0.85; }
.nav-btn.ghost { border-color: var(--border); }

.theme-toggle {
  font-size: 1.1rem;
  background: none;
  border: 1px solid var(--border);
  color: var(--text2);
  width: 34px;
  height: 34px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ---- HERO ---- */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: calc(100vh - 65px);
  padding: 60px 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
}

.hero-content { position: relative; z-index: 1; }

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 1px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -4px;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-title .accent { color: var(--accent); }

.hero-sub {
  font-size: 1rem;
  color: var(--text2);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-btns { display: flex; gap: 12px; margin-bottom: 48px; flex-wrap: wrap; }

.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 12px 28px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-primary.full { width: 100%; text-align: center; }

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 12px 28px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost.full { width: 100%; text-align: center; margin-top: 8px; }

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.feat {
  font-size: 0.75rem;
  padding: 6px 12px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text2);
}

.hero-preview { position: relative; z-index: 1; }

.preview-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.preview-label {
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

/* ---- AUTH ---- */
.auth-page {
  min-height: calc(100vh - 65px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
}

.auth-header { text-align: center; margin-bottom: 32px; }

.auth-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 8px;
}

.auth-header p { color: var(--text2); font-size: 0.9rem; }
.accent { color: var(--accent); }

.auth-form { display: flex; flex-direction: column; gap: 20px; }

.field { display: flex; flex-direction: column; gap: 6px; }

.field label {
  font-size: 0.75rem;
  color: var(--text2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.field input {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 12px 16px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  transition: border-color 0.2s;
  outline: none;
}

.field input:focus { border-color: var(--accent); }

.auth-switch {
  text-align: center;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text2);
}

.auth-switch a { color: var(--accent); text-decoration: none; }

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.alert.error { background: #ff000015; border: 1px solid #ff000040; color: #ff6b6b; }

/* ---- DASHBOARD ---- */
.dashboard { padding: 50px 60px; max-width: 1200px; margin: 0 auto; }

.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.dash-header h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -2px;
}

.dash-sub { color: var(--text2); font-size: 0.85rem; margin-top: 4px; }

.graph-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.graph-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.graph-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.graph-card-type {
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.graph-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.graph-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text2);
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 6px;
}

.graph-card-actions { display: flex; gap: 10px; }

.btn-sm {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 7px 14px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  display: inline-block;
}

.btn-sm:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm.danger { color: #ff6b6b; border-color: #ff6b6b33; }
.btn-sm.danger:hover { background: #ff6b6b15; }

.empty-state {
  text-align: center;
  padding: 100px 40px;
  color: var(--text2);
}

.empty-icon { font-size: 3rem; margin-bottom: 16px; }
.empty-state h3 { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 8px; color: var(--text); }
.empty-state p { margin-bottom: 24px; }

/* ---- EDITOR ---- */
.editor {
  display: grid;
  grid-template-columns: 380px 1fr;
  height: calc(100vh - 65px);
}

.editor-panel {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 28px 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.control-group { display: flex; flex-direction: column; gap: 8px; }

.control-label {
  font-size: 0.7rem;
  color: var(--text2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.control-input, .control-textarea {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
  resize: vertical;
}

.control-input:focus, .control-textarea:focus { border-color: var(--accent); }

.control-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.type-btns { display: flex; gap: 6px; flex-wrap: wrap; }

.type-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 7px 14px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.2s;
}

.type-btn:hover { border-color: var(--accent); color: var(--accent); }
.type-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

.data-hint {
  font-size: 0.7rem;
  color: var(--text2);
  background: var(--bg3);
  border-left: 2px solid var(--accent);
  padding: 8px 12px;
  border-radius: 0 4px 4px 0;
  line-height: 1.6;
}

.toggle-row { display: flex; flex-direction: column; gap: 10px; }

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text);
}

.toggle input { display: none; }

.toggle-slider {
  width: 36px;
  height: 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 12px; height: 12px;
  background: var(--text2);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}

.toggle input:checked + .toggle-slider { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + .toggle-slider::after { transform: translateX(16px); background: #000; }

.action-btns { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }

.save-msg {
  font-size: 0.8rem;
  text-align: center;
  padding: 6px;
  border-radius: 4px;
  min-height: 28px;
}

.save-msg.success { color: #00e57a; background: #00e57a15; }
.save-msg.error { color: #ff6b6b; background: #ff6b6b15; }

.editor-chart {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  padding: 30px;
}

.chart-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.chart-label {
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.chart-wrap {
  flex: 1;
  position: relative;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  overflow: hidden;
}

.chart-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text2);
  font-size: 0.9rem;
  gap: 10px;
}

.chart-empty div { font-size: 2.5rem; }

/* ---- 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(--accent); }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 40px 24px; }
  .hero-preview { display: none; }
  .editor { grid-template-columns: 1fr; height: auto; }
  .editor-panel { border-right: none; border-bottom: 1px solid var(--border); }
  .editor-chart { min-height: 400px; }
  .dashboard { padding: 30px 20px; }
  .dash-header { flex-direction: column; gap: 16px; }
  .navbar { padding: 14px 20px; }
}