:root {
  --bg: #f4f8fb;
  --bg-elevated: rgba(255, 255, 255, 0.82);
  --panel: #ffffff;
  --panel-alt: #f8fafc;
  --text: #0f172a;
  --text-soft: #64748b;
  --border: rgba(148, 163, 184, 0.24);
  --primary: #0f766e;
  --primary-2: #06b6d4;
  --accent: #14b8a6;
  --danger: #e11d48;
  --success: #059669;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
}

body.dark {
  --bg: #020617;
  --bg-elevated: rgba(15, 23, 42, 0.85);
  --panel: #0f172a;
  --panel-alt: #111827;
  --text: #e5eef8;
  --text-soft: #94a3b8;
  --border: rgba(148, 163, 184, 0.16);
  --primary: #2dd4bf;
  --primary-2: #22d3ee;
  --accent: #14b8a6;
  --danger: #fb7185;
  --success: #34d399;
  --shadow: 0 20px 50px rgba(2, 6, 23, 0.45);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(34, 211, 238, 0.15), transparent 28%),
    radial-gradient(circle at top right, rgba(20, 184, 166, 0.12), transparent 25%),
    var(--bg);
  color: var(--text);
}
button, input, textarea, select {
  font: inherit;
}
button { cursor: pointer; }
.hidden { display: none !important; }
.app-shell {
  min-height: 100vh;
}
.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-grid {
  width: min(1180px, 100%);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
}
.card {
  background: var(--bg-elevated);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}
.brand-panel {
  padding: 36px;
}
.auth-panel {
  padding: 36px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-badge {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: white;
  font-size: 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 16px 36px rgba(15, 118, 110, 0.25);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.08);
  color: var(--primary);
  margin-top: 28px;
  font-size: 14px;
  font-weight: 600;
}
.hero-title {
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 18px 0 14px;
}
.hero-text, .soft-text {
  color: var(--text-soft);
  line-height: 1.7;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.mini-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 16px;
}
.mini-card h4 {
  margin: 0 0 8px;
  font-size: 15px;
}
.mini-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.5;
}
.tab-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  background: var(--panel-alt);
  margin-bottom: 24px;
}
.tab-switch button {
  border: none;
  background: transparent;
  color: var(--text-soft);
  padding: 12px 14px;
  border-radius: 999px;
  font-weight: 600;
}
.tab-switch button.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.07);
}
.field {
  margin-bottom: 18px;
}
.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
}
.input, .textarea, .select {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
}
.textarea {
  min-height: 180px;
  resize: vertical;
}
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--primary-2);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.12);
}
.btn {
  border: none;
  border-radius: 18px;
  padding: 14px 18px;
  background: var(--panel-alt);
  color: var(--text);
  font-weight: 700;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
}
.btn-dark {
  background: #0f172a;
  color: white;
}
body.dark .btn-dark {
  background: white;
  color: #0f172a;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
}
.btn-danger {
  background: rgba(225, 29, 72, 0.1);
  color: var(--danger);
}
.error {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(225, 29, 72, 0.1);
  color: var(--danger);
  font-size: 14px;
  margin-bottom: 14px;
}
.main-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}
.sidebar {
  padding: 24px;
  border-right: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(20px);
}
.sidebar nav {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}
.nav-btn {
  width: 100%;
  text-align: left;
  border: none;
  padding: 14px 16px;
  border-radius: 18px;
  background: transparent;
  color: var(--text-soft);
  font-weight: 600;
}
.nav-btn.active {
  background: var(--text);
  color: var(--panel);
}
.sidebar-promo {
  margin-top: auto;
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
}
.main-column {
  min-width: 0;
}
.topbar {
  padding: 22px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  background: var(--bg-elevated);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-chip {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 18px;
  padding: 12px 14px;
}
.main-content {
  padding: 28px;
}
.dashboard-grid {
  display: grid;
  gap: 18px;
}
.hero-card {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 18px;
}
.gradient-panel {
  border-radius: var(--radius-xl);
  padding: 28px;
  color: white;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  box-shadow: var(--shadow);
}
body.dark .gradient-panel {
  background: linear-gradient(135deg, #0f766e, #0891b2);
}
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: 22px;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.stat-card h3, .panel h3, .panel h2, .gradient-panel h2, .entry-card h3 {
  margin-top: 0;
}
.panel-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 18px;
}
.recent-list, .entry-list {
  display: grid;
  gap: 14px;
}
.entry-card {
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  padding: 20px;
}
.entry-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}
.entry-meta, .muted {
  color: var(--text-soft);
  font-size: 14px;
}
.entry-content {
  white-space: pre-wrap;
  line-height: 1.75;
  margin: 14px 0 0;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.tag {
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--panel-alt);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
}
.controls-grid {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 14px;
}
.search-wrap, .select-wrap {
  position: relative;
}
.search-wrap span, .select-wrap span {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-soft);
}
.search-wrap .input, .select-wrap .select { padding-left: 42px; }
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.45);
  backdrop-filter: blur(8px);
  display: none;
  z-index: 50;
}
.modal-backdrop.open { display: block; }
.modal {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(860px, calc(100% - 24px));
  max-height: calc(100vh - 28px);
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 32px;
  box-shadow: 0 30px 80px rgba(2, 6, 23, 0.32);
  display: none;
  z-index: 60;
}
.modal.open { display: block; }
.modal-inner { padding: 26px; }
.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: start;
}
.mood-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.mood-option {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 14px;
  background: var(--panel);
  text-align: left;
}
.mood-option.active {
  background: var(--text);
  color: var(--panel);
  border-color: transparent;
}
.range-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.range-card {
  border-radius: 20px;
  background: var(--panel-alt);
  padding: 14px;
}
.chart {
  width: 100%;
  height: 280px;
  display: block;
}
.insight-box {
  border-radius: 22px;
  background: var(--panel-alt);
  padding: 18px;
}
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.toggle {
  width: 56px;
  height: 32px;
  border-radius: 999px;
  background: #cbd5e1;
  position: relative;
  border: none;
}
.toggle::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: white;
  top: 4px;
  left: 4px;
  transition: 0.2s ease;
}
.toggle.active {
  background: var(--accent);
}
.toggle.active::after { left: 28px; }
.mobile-nav {
  display: none;
  position: sticky;
  bottom: 0;
  z-index: 18;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 10px;
  backdrop-filter: blur(20px);
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.mobile-nav button {
  border: none;
  border-radius: 16px;
  padding: 10px 8px;
  background: transparent;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
}
.mobile-nav button.active {
  background: var(--panel);
  color: var(--text);
}
.empty-state {
  border: 1px dashed var(--border);
  border-radius: 24px;
  padding: 38px 20px;
  text-align: center;
  background: var(--bg-elevated);
}
@media (max-width: 1100px) {
  .auth-grid,
  .hero-card,
  .panel-grid,
  .settings-grid,
  .main-layout,
  .feature-grid,
  .range-grid,
  .mood-grid,
  .stat-grid { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .mobile-nav { display: grid; }
}
@media (max-width: 720px) {
  .topbar { padding: 18px; align-items: flex-start; flex-direction: column; }
  .main-content, .brand-panel, .auth-panel, .modal-inner { padding: 18px; }
  .controls-grid { grid-template-columns: 1fr; }
  .topbar-actions { width: 100%; flex-wrap: wrap; }
  .user-chip { width: 100%; }
}