/* Rostan DMS — Brand Stylesheet
   Design tokens lift directly from the Stitch mockups.
   No emoji content. Uses SVG icons referenced from /img/icons/.
*/

/* -------- 1. Design tokens (CSS variables) -------- */
:root {
  /* Brand */
  --brand-primary:        #4f46e5;
  --brand-primary-shade:  #4338ca;
  --brand-primary-tint:   #eef2ff;
  --brand-accent:         #06b6d4;
  --brand-radius:         12px;

  /* Surfaces (Material 3 light) */
  --surface:                 #fafafa;
  --surface-container-lowest:#ffffff;
  --surface-container-low:   #f7f7f8;
  --surface-container:       #f1f2f4;
  --surface-container-high:  #e7e8eb;
  --surface-container-highest:#dcdde1;

  /* Text + lines */
  --on-surface:           #18181b;
  --on-surface-variant:   #52525b;
  --outline:              #a1a1aa;
  --outline-variant:      #e4e4e7;
  --on-primary:           #ffffff;

  /* Status */
  --color-success:        #16a34a;
  --color-warning:        #d97706;
  --color-danger:         #dc2626;
  --color-info:           #2563eb;

  /* Spacing scale */
  --space-xxs: 2px;  --space-xs: 4px;  --space-sm: 8px;
  --space-md:  12px; --space-lg: 16px; --space-xl: 24px;
  --space-2xl: 32px; --space-3xl: 48px; --space-4xl: 64px;

  /* Type scale */
  --font-display:  "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:     "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:     ui-monospace, "SF Mono", Menlo, monospace;

  --text-display-lg: 56px;  --text-display-md: 44px;
  --text-headline-lg: 32px; --text-headline-md: 24px; --text-headline-sm: 20px;
  --text-title-md:   18px;  --text-title-sm:  16px;
  --text-body-md:    14px;  --text-body-sm:   12px;
  --text-label-md:   14px;  --text-label-sm:  12px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.04);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);

  /* Animation */
  --ease-out:  cubic-bezier(.4,0,.2,1);
  --dur-fast:  150ms;
  --dur-base:  220ms;
  --dur-slow:  320ms;
}

[data-theme="dark"]:root, [data-theme="dark"] {
  --surface:                 #0c0c0e;
  --surface-container-lowest:#000000;
  --surface-container-low:   #141416;
  --surface-container:       #1a1a1d;
  --surface-container-high:  #232327;
  --surface-container-highest:#2c2c30;
  --on-surface:              #fafafa;
  --on-surface-variant:      #a1a1aa;
  --outline:                 #52525b;
  --outline-variant:         #2c2c30;
  --brand-primary-tint:      #1e1b4b;
}

/* -------- 2. Reset & base -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  line-height: 1.55;
  color: var(--on-surface);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--brand-primary); text-decoration: none; transition: color var(--dur-fast); }
a:hover { color: var(--brand-primary-shade); }

h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -.02em; line-height: 1.15; margin: 0 0 var(--space-md); }
h1 { font-size: var(--text-display-md); font-weight: 700; }
h2 { font-size: var(--text-headline-lg); font-weight: 700; }
h3 { font-size: var(--text-headline-md); font-weight: 600; }
h4 { font-size: var(--text-headline-sm); font-weight: 600; }
p  { margin: 0 0 var(--space-md); }

/* -------- 3. Layout primitives -------- */
.container       { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-xl); }
.container-narrow{ max-width: 720px;  margin: 0 auto; padding: 0 var(--space-xl); }
.stack > * + *   { margin-top: var(--space-md); }
.row             { display: flex; gap: var(--space-md); }
.row.center      { align-items: center; }
.row.between     { justify-content: space-between; }
.row.wrap        { flex-wrap: wrap; }
.grid            { display: grid; gap: var(--space-lg); }
.grid.cols-2     { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3     { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4     { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

/* -------- 4. Top navigation -------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--outline-variant);
}
.site-nav .inner {
  max-width: 1200px; margin: 0 auto; padding: var(--space-md) var(--space-xl);
  display: flex; align-items: center; gap: var(--space-xl);
}
.site-nav .brand {
  display: flex; align-items: center; gap: var(--space-sm);
  font-weight: 700; font-size: var(--text-title-md); color: var(--on-surface);
}
.site-nav .brand svg { width: 28px; height: 28px; }
.site-nav .links { display: flex; gap: var(--space-lg); margin-left: auto; }
.site-nav .links a {
  color: var(--on-surface-variant); font-weight: 500;
  padding: var(--space-xs) var(--space-sm); border-radius: 6px;
}
.site-nav .links a:hover { color: var(--on-surface); background: var(--surface-container-low); }
.site-nav .cta { display: flex; gap: var(--space-sm); }

@media (max-width: 720px) {
  .site-nav .links { display: none; }
}

/* -------- 5. Buttons -------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  padding: 0 var(--space-lg); height: 40px;
  border: 1px solid transparent; border-radius: var(--brand-radius);
  font-size: var(--text-label-md); font-weight: 600;
  cursor: pointer; transition: all var(--dur-fast);
  white-space: nowrap; user-select: none;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn svg { width: 18px; height: 18px; }

.btn-primary    { background: var(--brand-primary); color: var(--on-primary); }
.btn-primary:hover    { background: var(--brand-primary-shade); }
.btn-secondary  { background: var(--surface-container); color: var(--on-surface); border-color: var(--outline-variant); }
.btn-secondary:hover  { background: var(--surface-container-high); }
.btn-ghost      { background: transparent; color: var(--on-surface); }
.btn-ghost:hover{ background: var(--surface-container-low); }
.btn-danger     { background: var(--color-danger); color: #fff; }

.btn-lg { height: 48px; padding: 0 var(--space-xl); font-size: 16px; }
.btn-sm { height: 32px; padding: 0 var(--space-md); font-size: 13px; }
.btn-block { width: 100%; }

/* -------- 6. Forms -------- */
.form-group { display: flex; flex-direction: column; gap: var(--space-xs); margin-bottom: var(--space-lg); }
.form-label { font-size: var(--text-label-md); font-weight: 500; color: var(--on-surface-variant); }
.form-required::after { content:" *"; color: var(--color-danger); }
.form-help  { font-size: var(--text-body-sm); color: var(--on-surface-variant); }
.form-error { font-size: var(--text-body-sm); color: var(--color-danger); display: none; }
.form-error.show { display: block; }

.form-control {
  width: 100%; height: 44px; padding: 0 var(--space-md);
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--brand-radius);
  font-family: inherit; font-size: var(--text-body-md); color: var(--on-surface);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
textarea.form-control { height: auto; min-height: 120px; padding: var(--space-md); resize: vertical; }
.form-control:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(79,70,229,.12);
}
.form-control.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 4px rgba(220,38,38,.12);
}

.form-row { display: grid; gap: var(--space-md); }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }

/* Password show/hide affordance */
.password-wrap { position: relative; }
.password-wrap .toggle {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--on-surface-variant); cursor: pointer;
  padding: 4px;
}
.password-wrap .toggle svg { width: 18px; height: 18px; }

/* -------- 7. Cards & surfaces -------- */
.card {
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--brand-radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}
.card.hover { transition: box-shadow var(--dur-base), transform var(--dur-base); }
.card.hover:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-title { font-size: var(--text-title-md); font-weight: 600; margin: 0 0 var(--space-sm); }
.card-meta  { font-size: var(--text-body-sm); color: var(--on-surface-variant); }

/* KPI tile */
.kpi {
  display: flex; flex-direction: column; gap: var(--space-xs);
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--brand-radius);
  padding: var(--space-lg);
}
.kpi-label { font-size: var(--text-label-sm); text-transform: uppercase; letter-spacing: .04em; color: var(--on-surface-variant); }
.kpi-value { font-size: var(--text-headline-lg); font-weight: 700; color: var(--on-surface); line-height: 1; }
.kpi-delta { font-size: var(--text-body-sm); }
.kpi-delta.up   { color: var(--color-success); }
.kpi-delta.down { color: var(--color-danger); }

/* -------- 8. Chips & badges -------- */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: var(--text-label-sm); font-weight: 500;
  padding: 2px 10px; border-radius: 999px;
  background: var(--surface-container); color: var(--on-surface-variant);
}
.chip-success { background: #dcfce7; color: #166534; }
.chip-warning { background: #fef3c7; color: #92400e; }
.chip-danger  { background: #fee2e2; color: #991b1b; }
.chip-info    { background: #dbeafe; color: #1e40af; }
.chip-brand   { background: var(--brand-primary-tint); color: var(--brand-primary-shade); }

/* -------- 9. Marketing sections -------- */
.hero {
  padding: var(--space-4xl) 0;
  background:
    radial-gradient(800px 400px at 80% 0%, rgba(79,70,229,.08), transparent),
    radial-gradient(600px 300px at 10% 100%, rgba(6,182,212,.06), transparent),
    var(--surface);
}
.hero .grid { align-items: center; }
.hero .title { font-size: var(--text-display-lg); margin: 0 0 var(--space-lg); letter-spacing: -.03em; }
.hero .lede  { font-size: 18px; color: var(--on-surface-variant); max-width: 60ch; margin: 0 0 var(--space-xl); }
.hero .cta-row { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.hero-illustration { display: flex; justify-content: center; }

.section { padding: var(--space-4xl) 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto var(--space-2xl); }
.section-header .eyebrow {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: var(--brand-primary-tint); color: var(--brand-primary-shade);
  font-size: var(--text-label-sm); font-weight: 600; margin-bottom: var(--space-md);
}
.section-header h2 { margin-bottom: var(--space-sm); }
.section-header p { color: var(--on-surface-variant); font-size: 16px; }

.feature {
  display: flex; flex-direction: column; gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--brand-radius);
  transition: border-color var(--dur-base), box-shadow var(--dur-base);
}
.feature:hover { border-color: var(--brand-primary); box-shadow: var(--shadow-md); }
.feature .icon-wrap {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--brand-primary-tint); color: var(--brand-primary);
  display: flex; align-items: center; justify-content: center;
}
.feature .icon-wrap svg { width: 24px; height: 24px; }
.feature h3 { font-size: 18px; margin: 0; }
.feature p  { color: var(--on-surface-variant); margin: 0; }

/* Pricing cards */
.price-card {
  display: flex; flex-direction: column; gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--brand-radius);
  position: relative;
}
.price-card.featured { border-color: var(--brand-primary); box-shadow: var(--shadow-md); }
.price-card.featured::before {
  content: "Most popular"; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--brand-primary); color: white;
  padding: 4px 12px; border-radius: 999px;
  font-size: var(--text-label-sm); font-weight: 600;
}
.price-card .plan-name { font-size: var(--text-title-md); font-weight: 600; color: var(--on-surface); margin: 0; }
.price-card .price     { display: flex; align-items: baseline; gap: var(--space-xs); }
.price-card .price .amount   { font-size: var(--text-headline-lg); font-weight: 700; }
.price-card .price .currency { font-size: var(--text-body-sm); color: var(--on-surface-variant); }
.price-card .price .period   { font-size: var(--text-body-sm); color: var(--on-surface-variant); }
.price-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-sm); }
.price-card ul li {
  display: flex; align-items: flex-start; gap: var(--space-sm);
  font-size: var(--text-body-md); color: var(--on-surface-variant);
}
.price-card ul li::before {
  content: ""; width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px;
  background: var(--brand-primary) url("../img/icons/check.svg") center/12px no-repeat;
  -webkit-mask: url("../img/icons/check.svg") center/12px no-repeat;
          mask: url("../img/icons/check.svg") center/12px no-repeat;
  background: var(--brand-primary);
}

/* -------- 10. Auth pages -------- */
.auth-shell {
  min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr;
}
@media (max-width: 920px) { .auth-shell { grid-template-columns: 1fr; } }
.auth-form-pane {
  padding: var(--space-4xl) var(--space-xl);
  display: flex; flex-direction: column; justify-content: center;
  max-width: 460px; margin: 0 auto; width: 100%;
}
.auth-form-pane .brand-mark {
  display: flex; align-items: center; gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  font-size: var(--text-title-md); font-weight: 700; color: var(--on-surface);
}
.auth-form-pane .brand-mark svg { width: 28px; height: 28px; }
.auth-form-pane h1 { font-size: var(--text-headline-lg); margin: 0 0 var(--space-sm); }
.auth-form-pane .lede { color: var(--on-surface-variant); margin: 0 0 var(--space-xl); }
.auth-form-pane .divider {
  text-align: center; margin: var(--space-xl) 0;
  position: relative; color: var(--on-surface-variant); font-size: var(--text-body-sm);
}
.auth-form-pane .divider::before {
  content: ""; position: absolute; top: 50%; left: 0; right: 0; height: 1px;
  background: var(--outline-variant); z-index: -1;
}
.auth-form-pane .divider span { background: var(--surface); padding: 0 var(--space-md); }
.auth-form-pane .alt-action { text-align: center; margin-top: var(--space-xl); color: var(--on-surface-variant); }
.auth-form-pane .sso-row {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-sm);
}
.auth-form-pane .sso-row .btn { padding: 0 var(--space-md); height: 44px; background: var(--surface-container-lowest); border: 1px solid var(--outline-variant); }
.auth-form-pane .sso-row .btn:hover { background: var(--surface-container-low); }

.auth-side-pane {
  background:
    linear-gradient(135deg, var(--brand-primary) 0%, #6366f1 50%, var(--brand-accent) 100%);
  padding: var(--space-4xl); color: white;
  display: flex; flex-direction: column; justify-content: space-between;
}
@media (max-width: 920px) { .auth-side-pane { display: none; } }
.auth-side-pane h2 { font-size: var(--text-headline-lg); color: white; }
.auth-side-pane .quote { font-size: 18px; line-height: 1.5; opacity: .92; }
.auth-side-pane .quote-meta { margin-top: var(--space-md); opacity: .8; font-size: var(--text-body-md); }

/* -------- 11. Toast notifications -------- */
.toast-stack {
  position: fixed; bottom: var(--space-xl); right: var(--space-xl);
  z-index: 200; display: flex; flex-direction: column; gap: var(--space-sm);
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  padding: var(--space-md) var(--space-lg);
  background: var(--on-surface); color: var(--surface);
  border-radius: var(--brand-radius);
  font-size: var(--text-body-md); font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: var(--space-sm);
  animation: toastIn var(--dur-base) var(--ease-out);
}
.toast.success { background: var(--color-success); color: white; }
.toast.error   { background: var(--color-danger);  color: white; }
.toast.info    { background: var(--color-info);    color: white; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* -------- 12. Footer -------- */
.site-footer {
  border-top: 1px solid var(--outline-variant);
  padding: var(--space-2xl) 0;
  background: var(--surface-container-low);
}
.site-footer .inner {
  max-width: 1200px; margin: 0 auto; padding: 0 var(--space-xl);
  display: flex; flex-direction: column; gap: var(--space-md);
  font-size: var(--text-body-sm); color: var(--on-surface-variant);
}
.site-footer .row { flex-wrap: wrap; }
.site-footer .links { display: flex; gap: var(--space-lg); }
.site-footer .links a { color: var(--on-surface-variant); }
.site-footer .links a:hover { color: var(--on-surface); }

/* -------- 13. Utilities -------- */
.text-center { text-align: center; }
.text-muted  { color: var(--on-surface-variant); }
.text-brand  { color: var(--brand-primary); }
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl{ margin-top: var(--space-2xl); }
.mb-0 { margin-bottom: 0; }
.mb-lg{ margin-bottom: var(--space-lg); }
.hidden { display: none !important; }
.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid currentColor; border-top-color: transparent;
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }