/* ============================================================
   HabitStreak — Premium Minimal Design System (Linear/Vercel)
   ============================================================ */

/* ── Custom Properties ─────────────────────────────────────── */
:root {
  /* Minimal Dark Palette */
  --bg-base: #0A0A0A;
  --bg-card: #111111;
  --bg-card-hover: #1A1A1A;
  --bg-input: #111111;
  --bg-elevated: #161616;

  /* Subtle Borders */
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-focus: rgba(255, 255, 255, 0.25);

  /* Typography Colors */
  --text-1: #EDEDED;
  --text-2: #A1A1AA;
  --text-3: #71717A;

  /* Accent (Blue/Indigo based on preference) */
  --accent: #3B82F6;
  --accent-dim: rgba(59, 130, 246, 0.1);
  --accent-glow: rgba(59, 130, 246, 0.05);

  --red: #EF4444;
  --red-dim: rgba(239, 68, 68, 0.1);

  /* Radii */
  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);

  /* Fonts */
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Animation */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --speed: 200ms;
  --speed-slow: 400ms;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-1);
  min-height: 100dvh;
  line-height: 1.6;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
  color: inherit;
}

::selection {
  background: rgba(59, 130, 246, 0.3);
}

/* ── Lucide Icons ──────────────────────────────────────────── */
.lucide {
  width: 1em;
  height: 1em;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sm { width: 0.85em; height: 0.85em; }
.icon-inline { display: inline-block; vertical-align: -0.125em; }

/* ── Page System ───────────────────────────────────────────── */
.page {
  display: none;
  position: relative;
  z-index: 1;
}

.page--active {
  display: block;
  animation: fadeSlideUp 0.4s var(--ease) both;
}

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

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-s);
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  transition: all var(--speed) var(--ease);
  position: relative;
  white-space: nowrap;
}

.btn--primary {
  background: var(--text-1);
  color: var(--bg-base);
  font-weight: 600;
}

.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn--primary:active {
  transform: translateY(0);
  opacity: 0.8;
}

.btn--accent {
  background: var(--bg-card);
  color: var(--text-1);
  border: 1px solid var(--border);
}

.btn--accent:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn--ghost {
  color: var(--text-2);
  padding: 8px 12px;
}

.btn--ghost:hover {
  color: var(--text-1);
  background: rgba(255, 255, 255, 0.04);
}

.btn--full { width: 100%; }
.btn--sm { padding: 8px 12px; font-size: 0.8125rem; }
.btn--lg { padding: 12px 24px; font-size: 0.9375rem; }

.btn--danger { color: var(--red); }
.btn--danger:hover { background: var(--red-dim); }

.btn__plus { font-size: 1.125rem; line-height: 1; font-weight: 300; }

.btn__loader {
  display: none;
  width: 14px; height: 14px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: var(--bg-base);
  border-radius: 50%;
  animation: spin 0.5s linear infinite;
}
.btn--loading .btn__text { display: none; }
.btn--loading .btn__loader { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Auth Page ─────────────────────────────────────────────── */
.auth-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 32px 32px 40px;
  box-shadow: var(--shadow-lg);
}

.auth-back { margin-bottom: 24px; }

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

.auth-brand__icon {
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--text-1);
}

.auth-brand__name {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-1);
}

.auth-brand__tagline {
  color: var(--text-2);
  font-size: 0.875rem;
  margin-top: 4px;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-base);
  padding: 4px;
  border-radius: var(--radius-s);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 8px 0;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-3);
  transition: all var(--speed) var(--ease);
}

.auth-tab--active {
  background: var(--bg-elevated);
  color: var(--text-1);
  box-shadow: var(--shadow-sm);
}

.auth-tab:hover:not(.auth-tab--active) { color: var(--text-2); }

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-form--hidden { display: none; }

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

.input-group label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-2);
}

.input-group input {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 10px 14px;
  font-size: 0.875rem;
  transition: all var(--speed) var(--ease);
  outline: none;
}

.input-group input::placeholder { color: var(--text-3); }

.input-group input:focus {
  border-color: var(--text-2);
  background: var(--bg-elevated);
}

/* ── Top Bar ───────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar__left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar__icon { font-size: 1.125rem; }

.topbar__brand {
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.02em;
}

.topbar__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar__email {
  color: var(--text-3);
  font-size: 0.8125rem;
}

/* ── Dashboard ─────────────────────────────────────────────── */
.dashboard {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.dashboard__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 16px;
}

.dashboard__title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.dashboard__subtitle {
  color: var(--text-2);
  font-size: 0.875rem;
  margin-top: 4px;
}

/* ── Add Habit Form ────────────────────────────────────────── */
.add-habit-form {
  margin-bottom: 32px;
  animation: fadeSlideUp 0.3s var(--ease) both;
}

.add-habit-form__inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.add-habit-form__input {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 10px 14px;
  font-size: 0.875rem;
  outline: none;
  transition: all var(--speed) var(--ease);
}

.add-habit-form__input:focus { border-color: var(--text-2); }

.add-habit-form__colors {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--dot-color);
  border: 2px solid transparent;
  transition: all var(--speed) var(--ease);
  cursor: pointer;
  opacity: 0.6;
}

.color-dot:hover {
  transform: scale(1.1);
  opacity: 1;
}

.color-dot--active {
  border-color: var(--text-1);
  opacity: 1;
  transform: scale(1.1);
}

.add-habit-form__actions { display: flex; gap: 8px; }

/* ── Habit Grid ────────────────────────────────────────────── */
.habit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 600px) {
  .habit-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── Habit Card ────────────────────────────────────────────── */
.habit-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 24px;
  transition: all var(--speed) var(--ease);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.habit-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--habit-color);
  opacity: 0.4;
  transition: all var(--speed) var(--ease);
}

.habit-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.habit-card:hover::before { opacity: 0.8; }

.habit-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}

.habit-card__info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.habit-card__icon {
  font-size: 1.125rem;
  flex-shrink: 0;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  border-radius: var(--radius-s);
  color: var(--text-2);
}

.habit-card__name {
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-1);
}

/* Card menu */
.habit-card__menu { position: relative; }

.habit-card__menu-btn {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-s);
  color: var(--text-3);
  transition: all var(--speed) var(--ease);
}

.habit-card__menu-btn:hover {
  color: var(--text-1);
  background: var(--bg-elevated);
}

.habit-card__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 4px;
  min-width: 140px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: none;
  animation: fadeSlideUp 0.15s var(--ease);
}

.habit-card__dropdown--open { display: block; }

.habit-card__dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  font-size: 0.8125rem;
  text-align: left;
  border-radius: 4px;
  color: var(--text-2);
  transition: all var(--speed) var(--ease);
}

.habit-card__dropdown-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-1);
}

/* Card bottom */
.habit-card__bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.habit-card__streak {
  display: flex;
  flex-direction: column;
}

.habit-card__streak-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-1);
}

.habit-card__streak-label {
  font-size: 0.6875rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  margin-top: 6px;
}

.habit-card__longest {
  font-size: 0.75rem;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-top: 4px;
}

.habit-card__longest span { color: var(--text-2); }

/* ── Check-in Button ───────────────────────────────────────── */
.checkin-btn {
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--speed) var(--ease);
  flex-shrink: 0;
  color: var(--text-3);
  background: var(--bg-base);
}

.checkin-btn:hover {
  border-color: var(--text-2);
  color: var(--text-1);
}

.checkin-btn--done {
  background: var(--text-1);
  border-color: var(--text-1);
  color: var(--bg-base);
}

.checkin-btn--done:hover {
  opacity: 0.9;
  color: var(--bg-base);
}

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-m);
  margin-top: 24px;
}

.empty-state__icon {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--text-3);
  display: block;
}

.empty-state__title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-1);
}

.empty-state__text {
  color: var(--text-3);
  font-size: 0.875rem;
}

/* ── Detail Page ───────────────────────────────────────────── */
.detail {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.detail__header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.detail__icon {
  font-size: 1.5rem;
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: var(--radius-m);
  border: 1px solid var(--border);
  color: var(--text-2);
}

.detail__name {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

/* Stats */
.detail__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 24px;
  text-align: center;
}

.stat-card__number {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-1);
}

.stat-card__label {
  font-size: 0.75rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  margin-top: 12px;
  display: block;
}

/* Contribution grid */
.detail__grid-section { margin-top: 16px; }

.detail__grid-title {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--text-2);
}

.contribution-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 24px;
  overflow-x: auto;
}

.contribution-months {
  display: grid;
  grid-template-columns: repeat(53, 12px);
  gap: 4px;
  margin-bottom: 8px;
  margin-left: 28px;
  font-size: 0.625rem;
  color: var(--text-3);
  font-weight: 500;
}

.contribution-grid-container {
  display: flex;
  gap: 8px;
}

.contribution-days {
  display: grid;
  grid-template-rows: repeat(7, 12px);
  gap: 4px;
  font-size: 0.625rem;
  color: var(--text-3);
  width: 20px;
  flex-shrink: 0;
  font-weight: 500;
}

.contribution-days span {
  display: flex;
  align-items: center;
}

.contribution-grid {
  display: grid;
  grid-template-rows: repeat(7, 12px);
  grid-auto-flow: column;
  grid-auto-columns: 12px;
  gap: 4px;
}

.contribution-cell {
  width: 12px; height: 12px;
  border-radius: 2px;
  background: var(--text-1);
  opacity: 0.05;
  transition: all var(--speed) var(--ease);
}

.contribution-cell--filled { opacity: 1; }

.contribution-cell:hover {
  outline: 1px solid var(--text-2);
  outline-offset: -1px;
}

.contribution-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  justify-content: flex-end;
}

.contribution-legend__label {
  font-size: 0.625rem;
  color: var(--text-3);
  margin: 0 4px;
  font-weight: 500;
}

.contribution-legend__box {
  width: 12px; height: 12px;
  border-radius: 2px;
  background: var(--text-1);
}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
  animation: fadeIn 0.2s var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  animation: fadeSlideUp 0.3s var(--ease);
}

.modal-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.modal-card .input-group { margin-bottom: 16px; }

.modal-card__actions {
  display: flex;
  gap: 8px;
  margin-top: 32px;
}

/* ── Toast ─────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 9999;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  align-items: flex-end;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-s);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-1);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  animation: slideInRight 0.3s var(--ease), slideOutRight 0.3s var(--ease) 2.7s forwards;
}

.toast--success { border-left: 3px solid #10B981; }
.toast--error { border-left: 3px solid var(--red); }
.toast--info { border-left: 3px solid var(--accent); }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}

/* ================================================================
   LANDING / HOME PAGE
   ================================================================ */
.home-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.home-nav__left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.home-nav__brand {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.home-nav__right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px 80px;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-bottom: 32px;
  animation: fadeSlideUp 0.5s var(--ease) both;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeSlideUp 0.6s var(--ease) 0.1s both;
}

.hero__title--accent { color: var(--accent); }

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-2);
  max-width: 540px;
  margin: 0 auto 40px;
  line-height: 1.6;
  font-weight: 400;
  animation: fadeSlideUp 0.6s var(--ease) 0.2s both;
}

.hero__actions {
  margin-bottom: 80px;
  animation: fadeSlideUp 0.6s var(--ease) 0.3s both;
}

.hero__preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
  animation: fadeSlideUp 0.8s var(--ease) 0.4s both;
}

.preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 20px;
  text-align: left;
  transition: all var(--speed) var(--ease);
}

.preview-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.preview-card__top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.preview-card__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}

.preview-card__name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-1);
}

.preview-card__bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.preview-card__streak {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.preview-card__check {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--text-3);
}

.preview-card__check--done {
  background: var(--text-1);
  border-color: var(--text-1);
  color: var(--bg-base);
}

.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 40px;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 32px;
  transition: all var(--speed) var(--ease);
}

.feature-card:hover {
  background: var(--bg-card);
}

.feature-card__icon {
  font-size: 1.5rem;
  margin-bottom: 24px;
  color: var(--text-2);
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.feature-card__desc {
  font-size: 0.875rem;
  color: var(--text-3);
  line-height: 1.6;
}

.social-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 40px 100px;
}

.social-proof__stat { text-align: center; }

.social-proof__number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-1);
}

.social-proof__label {
  font-size: 0.75rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  margin-top: 8px;
  display: block;
}

.social-proof__divider {
  width: 1px; height: 48px;
  background: var(--border);
}

.home-cta {
  text-align: center;
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.home-cta__title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.home-cta__subtitle {
  font-size: 1.125rem;
  color: var(--text-2);
  margin-bottom: 40px;
}

/* ── Trusted By ────────────────────────────────────────────── */
.trusted-by {
  text-align: center;
  padding: 40px 24px;
  max-width: 1200px;
  margin: 0 auto 60px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trusted-by__text {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
  margin-bottom: 24px;
  font-weight: 500;
}

.trusted-by__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 48px;
}

.company-logo {
  height: 28px;
  width: auto;
  filter: invert(1) opacity(0.4);
  transition: all var(--speed) var(--ease);
}

.company-logo:hover {
  filter: invert(1) opacity(1);
}

/* ── Common Landing Sections ───────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header__title {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-header__subtitle {
  font-size: 1.125rem;
  color: var(--text-2);
}

/* ── How It Works ──────────────────────────────────────────── */
.how-it-works {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
  z-index: 0;
}

.timeline__item {
  position: relative;
  z-index: 1;
}

.timeline__number {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 24px;
}

.timeline__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.timeline__desc {
  font-size: 0.875rem;
  color: var(--text-3);
  line-height: 1.6;
}

/* ── Testimonials ──────────────────────────────────────────── */
.testimonials {
  padding: 100px 40px;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.testimonials__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 32px;
  transition: all var(--speed) var(--ease);
}

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

.testimonial-card__text {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-1);
  margin-bottom: 32px;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.testimonial-card__avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
}

.testimonial-card__name {
  font-weight: 600;
  font-size: 0.875rem;
}

.testimonial-card__role {
  font-size: 0.75rem;
  color: var(--text-3);
}

/* ── FAQ ───────────────────────────────────────────────────── */
.faq {
  max-width: 800px;
  margin: 0 auto;
  padding: 100px 40px;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  background: var(--bg-card);
  overflow: hidden;
  transition: all var(--speed) var(--ease);
}

.faq-item:hover { border-color: var(--border-hover); }

.faq-item__question {
  width: 100%;
  text-align: left;
  padding: 24px;
  font-size: 1rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-1);
}

.faq-item__icon {
  color: var(--text-3);
  transition: transform var(--speed) var(--ease);
}

.faq-item--open .faq-item__icon { transform: rotate(180deg); }

.faq-item__answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s var(--ease);
  color: var(--text-3);
  font-size: 0.875rem;
  line-height: 1.6;
}

.faq-item--open .faq-item__answer {
  padding-bottom: 24px;
  max-height: 200px;
}

/* ── Footer ────────────────────────────────────────────────── */
.home-footer {
  padding: 80px 40px 40px;
  border-top: 1px solid var(--border);
}

.home-footer__content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  text-align: left;
}

.home-footer__col {
  display: flex;
  flex-direction: column;
}

.home-footer__text {
  font-size: 0.8125rem;
  color: var(--text-3);
}

.home-footer__links {
  display: flex;
  gap: 24px;
}

.home-footer__links a {
  font-size: 0.875rem;
  color: var(--text-2);
  transition: color var(--speed) var(--ease);
}

.home-footer__links a:hover { color: var(--text-1); }


/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero { padding: 60px 24px 40px; }
  .hero__preview { grid-template-columns: 1fr; max-width: 320px; }
  .features__grid { grid-template-columns: 1fr; }
  .social-proof { flex-direction: column; gap: 32px; }
  .social-proof__divider { width: 48px; height: 1px; }
  .home-nav { padding: 20px 24px; }
  .features, .home-cta, .how-it-works, .testimonials, .faq { padding: 60px 24px; }
  .detail__stats { grid-template-columns: 1fr; }
  
  .timeline { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .testimonials__grid { grid-template-columns: 1fr; }
  .home-footer__content { flex-direction: column; gap: 32px; }
}

/* ── Focus Visible ─────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--text-2);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
input:focus:not(:focus-visible) {
  outline: none;
}

/* ================================================================
   GOOGLE AUTH / NEW AUTH UI ADDITIONS
   ================================================================ */

/* ── Auth Loading Overlay ─────────────────────────────────────── */
.auth-loading {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease);
}

.auth-loading--visible {
  opacity: 1;
  pointer-events: all;
}

.auth-loading__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.auth-loading__spinner {
  width: 32px;
  height: 32px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--text-1);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.auth-loading__text {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-3);
}

/* ── Google Sign-In Button ─────────────────────────────────────── */
.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 11px 16px;
  background: #fff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: var(--radius-s);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--speed) var(--ease);
  position: relative;
  margin-bottom: 20px;
}

.btn-google:hover:not(:disabled) {
  background: #f8f9fa;
  box-shadow: 0 1px 6px rgba(32, 33, 36, 0.28);
  transform: translateY(-1px);
}

.btn-google:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: none;
}

.btn-google:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-google__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-google .btn__loader {
  border-color: rgba(60, 64, 67, 0.2);
  border-top-color: #3c4043;
}

.btn-google.btn--loading .btn__text { display: none; }
.btn-google.btn--loading .btn__loader { display: inline-block; }

/* ── Auth Divider ─────────────────────────────────────────────── */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.auth-divider__line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-divider__text {
  font-size: 0.75rem;
  color: var(--text-3);
  font-weight: 500;
  white-space: nowrap;
}

/* ── Avatar Menu (Topbar) ─────────────────────────────────────── */
.avatar-menu {
  position: relative;
}

.avatar-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
  padding: 0;
}

.avatar-btn:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar-fallback {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Avatar Dropdown Menu ─────────────────────────────────────── */
.avatar-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
  z-index: 100;
}

.avatar-dropdown--open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.avatar-dropdown__header {
  padding: 8px 12px 10px;
}

.avatar-dropdown__name {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.avatar-dropdown__divider {
  height: 1px;
  background: var(--border);
  margin: 2px 0 6px;
}

.avatar-dropdown__item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: left;
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease);
}

.avatar-dropdown__item:hover {
  background: rgba(255, 255, 255, 0.04);
}

/* ── Dashboard Welcome Greeting ───────────────────────────────── */
.dashboard__welcome {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  animation: fadeSlideUp 0.4s var(--ease) both;
}

.dashboard__welcome-wave {
  font-size: 1.5rem;
  line-height: 1;
  animation: wave 1.2s ease-in-out both;
  transform-origin: 70% 70%;
  display: inline-block;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  20%  { transform: rotate(-10deg); }
  40%  { transform: rotate(14deg); }
  60%  { transform: rotate(-8deg); }
  80%  { transform: rotate(10deg); }
}

.dashboard__welcome-text {
  font-size: 0.9375rem;
  color: var(--text-2);
  font-weight: 400;
}

.dashboard__welcome-text strong {
  color: var(--text-1);
  font-weight: 600;
}

/* ── Toast Improvements ───────────────────────────────────────── */
.toast--fade-out {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ── Responsive additions ─────────────────────────────────────── */
@media (max-width: 768px) {
  .btn-google { font-size: 0.8125rem; padding: 10px 14px; }
  .dashboard__welcome { flex-direction: row; padding: 14px 16px; }
  .avatar-dropdown { right: -8px; }
}