:root {
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-2: #ffffff;
  --border: rgba(15, 23, 42, 0.09);
  --primary: #4f46e5;
  --primary-2: #7c3aed;
  --text: #0f172a;
  --muted: #64748b;
  --success: #0f9f6e;
  --danger: #dc2626;
  --shadow-xs: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-sm: 0 18px 44px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 34px 90px rgba(15, 23, 42, 0.18);
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 32px;
  --space-1: 0.375rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.25rem;
  --space-5: 1.75rem;
  --space-6: 2.5rem;
  --space-7: 3.5rem;
  --font-display: clamp(2.25rem, 3vw, 4.25rem);
  --font-h1: clamp(1.6rem, 2vw, 2.6rem);
  --font-h2: clamp(1.25rem, 1.6vw, 1.85rem);
  --font-body: 0.98rem;
}

[data-theme="dark"] {
  --bg: #050816;
  --surface: rgba(12, 18, 34, 0.76);
  --surface-2: #0b1224;
  --border: rgba(148, 163, 184, 0.14);
  --primary: #818cf8;
  --primary-2: #38bdf8;
  --text: #ecf3ff;
  --muted: #94a3b8;
  --shadow-xs: 0 10px 30px rgba(2, 6, 23, 0.28);
  --shadow-sm: 0 18px 48px rgba(2, 6, 23, 0.42);
  --shadow-lg: 0 36px 100px rgba(2, 6, 23, 0.54);
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.16), transparent 28%),
    radial-gradient(circle at right 20%, rgba(56, 189, 248, 0.12), transparent 22%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 74%, white) 0%, var(--bg) 100%);
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
svg { width: 1.15rem; height: 1.15rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.eyebrow,
.surface-control__label,
.label,
.sidebar__eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.95rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.78rem 1.2rem;
  font-weight: 600;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
  cursor: pointer;
}
.button:hover { transform: translateY(-1px); }
.button--block { width: 100%; }
.button--primary {
  color: white;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 16px 30px color-mix(in srgb, var(--primary) 26%, transparent);
}
.button--ghost {
  background: color-mix(in srgb, var(--surface-2) 90%, transparent);
  border-color: var(--border);
  color: var(--text);
}
.button--ghost:hover { border-color: color-mix(in srgb, var(--primary) 36%, var(--border)); }

.input,
.theme-select {
  width: 100%;
  min-height: 3.2rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 92%, transparent);
  color: var(--text);
  padding: 0.92rem 1rem;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.input:focus,
.theme-select:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 54%, white);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 16%, transparent);
}
.input--premium { font-size: 1rem; }

.form-stack,
.field,
.sidebar,
.sidebar__nav,
.sidebar__footer,
.surface-control,
.dashboard-workspace {
  display: grid;
  gap: var(--space-3);
}

.alert {
  margin-bottom: var(--space-3);
  border-radius: 18px;
  padding: 0.95rem 1rem;
  border: 1px solid color-mix(in srgb, var(--danger) 24%, transparent);
  background: color-mix(in srgb, var(--danger) 8%, var(--surface-2));
  color: var(--danger);
}

.segmented-control {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-2) 92%, transparent);
  border: 1px solid var(--border);
  gap: 0.2rem;
}
.segmented-control__item {
  border-radius: 999px;
  padding: 0.52rem 0.8rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
  transition: background .2s ease, color .2s ease;
}
.segmented-control__item.is-active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
}

.login-page { min-height: 100dvh; }
.login-shell-premium {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
}
.login-visual {
  position: relative;
  display: none;
  overflow: hidden;
}
.login-visual__image,
.login-visual__overlay {
  position: absolute;
  inset: 0;
}
.login-visual__image {
  background:
    linear-gradient(135deg, rgba(12, 18, 34, 0.16), rgba(12, 18, 34, 0.08)),
    url('https://images.unsplash.com/photo-1460317442991-0ec209397118?auto=format&fit=crop&w=1400&q=80') center/cover no-repeat;
  transform: scale(1.04);
}
.login-visual__overlay {
  background:
    linear-gradient(180deg, rgba(5, 8, 22, 0.2), rgba(5, 8, 22, 0.76)),
    radial-gradient(circle at top left, rgba(129, 140, 248, 0.22), transparent 28%);
}
.login-visual__content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  align-content: end;
  padding: var(--space-7);
  color: #fff;
}
.login-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  padding: 0.52rem 0.9rem;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,0.16);
  font-weight: 600;
}
.login-visual__content h1 {
  margin: 1.1rem 0 0.75rem;
  max-width: 11ch;
  font-size: var(--font-display);
  line-height: 0.98;
}
.login-visual__content p {
  margin: 0;
  max-width: 34rem;
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.84);
}
.login-form-column {
  display: grid;
  place-items: center;
  padding: var(--space-4);
}
.login-card-premium {
  width: min(100%, 34rem);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(28px);
}
.login-card-premium__topbar,
.login-card-premium__header,
.topbar,
.topbar__left,
.topbar__right,
.sidebar__header,
.workspace-panel__head,
.dashboard-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.login-card-premium__header {
  align-items: flex-start;
  margin: var(--space-4) 0 var(--space-5);
}
.login-card-premium__header h2,
.page-title,
.dashboard-hero h2,
.module-tile h3,
.workspace-panel h3,
.sidebar__panel h2 {
  margin: 0;
}
.login-card-premium__header p,
.sidebar__panel p,
.dashboard-hero p,
.module-tile p,
.workspace-panel p,
.sidebar__footer small {
  margin: 0.5rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}
.password-field { position: relative; }
.password-toggle {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
}
.password-toggle:hover { color: var(--primary); }

.app-frame { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: min(19rem, 88vw);
  padding: var(--space-4);
  grid-template-rows: auto auto 1fr auto;
  background:
    linear-gradient(180deg, rgba(10, 14, 28, 0.98), rgba(8, 13, 28, 0.92)),
    radial-gradient(circle at top right, rgba(124, 58, 237, 0.22), transparent 30%);
  color: #eef2ff;
  border-right: 1px solid rgba(148,163,184,0.12);
  transform: translateX(-100%);
  transition: transform .26s ease;
  z-index: 40;
}
.sidebar-visible .sidebar { transform: translateX(0); }
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.52);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
  z-index: 30;
}
.sidebar-visible .sidebar-backdrop {
  opacity: 1;
  pointer-events: auto;
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.95rem;
}
.brand-mark__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 18px 36px color-mix(in srgb, var(--primary) 24%, transparent);
}
.brand-mark__copy strong,
.sidebar__footer p {
  display: block;
  margin: 0;
  font-weight: 600;
}
.brand-mark__copy small { color: rgba(226,232,240,0.64); }
.sidebar__close,
.menu-button {
  width: 2.85rem;
  height: 2.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid rgba(148,163,184,0.14);
  background: rgba(255,255,255,0.04);
  color: inherit;
  cursor: pointer;
}
.sidebar__panel {
  padding: 1.1rem;
  border-radius: 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(148,163,184,0.1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}
.sidebar__panel h2 { font-size: 1.15rem; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.92rem 1rem;
  border-radius: 18px;
  color: rgba(226,232,240,0.72);
  transition: background .22s ease, color .22s ease, transform .22s ease;
}
.nav-item:hover,
.nav-item--active {
  color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateX(2px);
}
.workspace {
  min-height: 100vh;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1rem;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border);
}
.page-title {
  font-size: var(--font-h1);
  line-height: 1.06;
}
.workspace__body { padding: var(--space-4); }
.workspace__inner {
  width: min(1240px, 100%);
  margin: 0 auto;
}
.surface-control { gap: 0.45rem; }
.card-surface,
.module-tile,
.workspace-panel {
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-sm);
}
.dashboard-hero {
  align-items: stretch;
  margin-bottom: var(--space-4);
}
.dashboard-hero__copy,
.dashboard-hero__status {
  flex: 1 1 20rem;
  padding: var(--space-5);
}
.status-pill {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  padding: 0.5rem 0.8rem;
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  color: var(--primary);
  font-weight: 600;
}
.status-pill--ghost {
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  border: 1px solid var(--border);
}
.module-grid-premium {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.module-tile {
  padding: var(--space-4);
  display: grid;
  gap: var(--space-3);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.module-tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--primary) 22%, var(--border));
}
.module-tile__icon {
  width: 3rem;
  height: 3rem;
  border-radius: 18px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 20%, transparent), color-mix(in srgb, var(--primary-2) 26%, transparent));
}
.module-tile__tag {
  width: fit-content;
  color: var(--muted);
  font-size: 0.84rem;
}
.workspace-panel {
  padding: var(--space-5);
}
.empty-canvas {
  min-height: 16rem;
  display: grid;
  place-items: center;
  gap: 1rem;
  text-align: center;
  border-radius: 26px;
  border: 1px dashed color-mix(in srgb, var(--primary) 22%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 88%, transparent), transparent);
}
.empty-canvas__orb {
  width: 5rem;
  height: 5rem;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, color-mix(in srgb, var(--primary) 46%, white), color-mix(in srgb, var(--primary-2) 56%, transparent));
  box-shadow: 0 20px 40px color-mix(in srgb, var(--primary) 24%, transparent);
}

@media (min-width: 960px) {
  .login-shell-premium { grid-template-columns: 1.08fr 0.92fr; }
  .login-visual { display: block; }
  .login-form-column { padding: var(--space-6); }
}

@media (min-width: 1180px) {
  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    transform: none;
  }
  .sidebar-backdrop,
  .sidebar__close,
  .menu-button { display: none; }
  .app-frame {
    display: grid;
    grid-template-columns: 19rem minmax(0, 1fr);
  }
  .topbar,
  .workspace__body { padding: 1.2rem 1.5rem; }
  .module-grid-premium { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 719px) {
  .login-card-premium__topbar,
  .topbar__right { align-items: stretch; }
  .segmented-control { width: fit-content; }
}