/* ==========================================================================
   SOLO SQUARE BERLARI 2026 — Official Proposal Theme Design Tokens & System
   Theme: 21st Anniversary Solo Square • "Rise Together" (Sky/Ocean Teal + Mist + Sunrise Orange)
   Responsive across Android/iOS (320px+), Tablets 7–10" (641–1024px),
   Laptops/Desktops 11–32" (1025–1920px), & 43–90" 4K/8K Monitors (1921px+)
   ========================================================================== */

:root {
  color-scheme: light;

  /* Progressive Oklab interpolation token (always paired with non-empty angle preamble) */
  --in-oklab: ;

  /* Proposal 2026 Primary Ocean & Sky Teal Scale */
  --sb-teal-950: #07222B;
  --sb-teal-900: #0D3542;
  --sb-teal-800: #144E60;
  --sb-teal-700: #1B667B;
  --sb-teal-600: #25839C;
  --sb-teal-500: #38A3BD;
  --sb-teal-400: #45B6C6;
  --sb-teal-300: #7AD0DC;
  --sb-teal-100: #DFF3F7;
  --sb-teal-50:  #F1FAFC;

  /* Proposal 2026 Sunrise & Terracotta Orange Scale */
  --sb-orange-700: #A83A06;
  --sb-orange-600: #C84B0B;
  --sb-orange-500: #EA6A18;
  --sb-orange-400: #F48C3E;
  --sb-orange-300: #F9B072;
  --sb-orange-100: #FFEEDD;
  --sb-orange-50:  #FFF8F2;

  /* Proposal 2026 Sunlit Warm Gold / Mist Accents */
  --sb-sun-500: #D97706;
  --sb-sun-400: #F59E0B;
  --sb-sun-300: #FFB36B;
  --sb-sun-100: #FEF3C7;

  /* Semantic Aliases (backwards-compatible with all existing component classes) */
  --sb-indigo-950: var(--sb-teal-950);
  --sb-indigo-900: var(--sb-teal-900);
  --sb-indigo-800: var(--sb-teal-800);
  --sb-indigo-700: var(--sb-teal-700);
  --sb-indigo-600: var(--sb-teal-600);
  --sb-indigo-100: var(--sb-teal-100);
  --sb-indigo-50:  var(--sb-teal-50);

  --sb-volt-500:   var(--sb-teal-500);
  --sb-volt-400:   var(--sb-teal-400);
  --sb-volt-300:   var(--sb-sun-300);
  --sb-volt-100:   var(--sb-sun-100);

  /* Neutral Architectural Mist Surfaces */
  --sb-bg:            #F3F8FA;
  --sb-surface:       #FFFFFF;
  --sb-surface-alt:   #ECF5F8;
  --sb-border:        #D7E6EC;
  --sb-border-strong: #B8D0DA;

  --sb-text-primary:   #0C2933;
  --sb-text-secondary: #3E5964;
  --sb-text-muted:     #607D89;

  /* Semantic States */
  --sb-success:     #059669;
  --sb-success-bg:  #ECFDF5;
  --sb-warning:     #D97706;
  --sb-warning-bg:  #FFFBEB;
  --sb-danger:      #DC2626;
  --sb-danger-bg:   #FEF2F2;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Elevation & Radii */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  --shadow-xs: 0 1px 2px rgba(7, 34, 43, 0.05);
  --shadow-sm: 0 4px 12px rgba(7, 34, 43, 0.06), 0 1px 3px rgba(7, 34, 43, 0.04);
  --shadow-md: 0 12px 32px -6px rgba(7, 34, 43, 0.09), 0 4px 10px -2px rgba(7, 34, 43, 0.04);
  --shadow-lg: 0 24px 54px -12px rgba(7, 34, 43, 0.2);
  --shadow-orange: 0 12px 28px -6px rgba(234, 106, 24, 0.4);

  /* Input method adaptive touch target (WCAG 2.5.8 / 2.5.5) */
  --target-size: 24px;

  /* Safe-area insets for iOS/Android edge-to-edge screens */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);

  /* Dynamic container widths */
  --public-max-width: 1320px;
  --admin-max-width: 1720px;
}

@supports (background: linear-gradient(in oklab, white, black)) {
  :root {
    --in-oklab: in oklab;
  }
}

@media (pointer: coarse) {
  :root {
    --target-size: 46px;
  }
}

/* Large Monitors (27"–55" QHD / 4K) & Ultra-Large Displays (55"–90" Command Center / TV) */
@media (min-width: 1921px) {
  html {
    font-size: clamp(16px, 0.5rem + 0.48vw, 24px);
  }
  :root {
    --public-max-width: min(90vw, 2100px);
    --admin-max-width: min(95vw, 2900px);
  }
}

/* Base Resets & Form-Factor Protections */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--sb-text-primary);
  background-color: var(--sb-bg);
  line-height: 1.55;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  text-wrap: balance;
  margin-block: 0;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

p, li {
  text-wrap: pretty;
}

img, svg, video {
  max-inline-size: 100%;
  block-size: auto;
  display: block;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* Accessible Visually-Hidden Helper (Preserves Screen Reader Tree) */
.visually-hidden:where(:not(:focus-within, :active)) {
  position: absolute !important;
  clip-path: inset(50%) !important;
  overflow: hidden !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  white-space: nowrap !important;
}

/* Touch Target Minimums */
:where(
  button,
  select,
  textarea,
  input:not([type="checkbox"], [type="radio"]),
  [role="button"],
  nav a,
  label:has(input[type="checkbox"], input[type="radio"])
) {
  min-block-size: var(--target-size);
  min-inline-size: var(--target-size);
}

:where([role="button"], nav a, label:has(input[type="checkbox"], input[type="radio"])) {
  display: inline-flex;
  align-items: center;
}

/* Focus-Visible Accessibility Ring */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--sb-orange-500);
  outline-offset: 2px;
}

/* Brand-Consistent Native Form Controls (>3:1 Contrast Accent Color) */
input,
select,
textarea {
  font: inherit;
  font-size: max(1rem, 1em); /* Prevents unwanted iOS Safari viewport zoom */
  color: var(--sb-text-primary);
  accent-color: #144E60;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-block-end: 1.15rem;
  min-inline-size: 0;
}

.field-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--sb-text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.req-star {
  color: var(--sb-orange-600);
  font-weight: 800;
}

.field-hint {
  font-size: 0.78rem;
  color: var(--sb-text-muted);
  line-height: 1.35;
}

.form-control {
  inline-size: 100%;
  min-block-size: 48px;
  padding: 0.7rem 0.95rem;
  background-color: #FFFFFF;
  border: 1.5px solid var(--sb-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

@media (pointer: coarse) {
  .form-control {
    min-block-size: 52px;
  }
}

.form-control:hover:not(:disabled) {
  border-color: #84A9B8;
}

.form-control:focus {
  border-color: var(--sb-teal-600);
  box-shadow: 0 0 0 4px rgba(37, 131, 156, 0.16);
  outline: none;
}

select.form-control {
  appearance: none;
  padding-inline-end: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23144E60' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
}

.error-msg {
  display: none;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--sb-danger);
  margin-block-start: 0.2rem;
  line-height: 1.35;
}

:is(input, select, textarea):is(:user-invalid, .user-invalid-fallback) {
  border-color: var(--sb-danger);
  background-color: var(--sb-danger-bg);
}

:is(input, select, textarea):is(:user-invalid, .user-invalid-fallback) + .error-msg {
  display: block;
}

:is(input, select, textarea):is(:user-valid, .user-valid-fallback):not([type="checkbox"], [type="radio"]) {
  border-color: #10B981;
}

/* Native Modal <dialog> Containment & Top-Layer Backdrop */
dialog {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: 0;
  max-inline-size: min(94vw, 680px);
  inline-size: 100%;
  max-block-size: 90dvh;
  background: var(--sb-surface);
  color: var(--sb-text-primary);
  box-shadow: var(--shadow-lg);
}

dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  background-color: rgba(7, 34, 43, 0.7);
  backdrop-filter: blur(6px);
  overflow: hidden;
  overscroll-behavior: contain;
}

dialog[open] {
  animation: sbDialogEnter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes sbDialogEnter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Shared Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  padding: 0.78rem 1.35rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.14s ease, box-shadow 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.58;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg var(--in-oklab), var(--sb-orange-400), var(--sb-orange-600));
  color: #FFFFFF;
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg var(--in-oklab), var(--sb-orange-500), var(--sb-orange-700));
}

.btn-indigo {
  background: linear-gradient(135deg var(--in-oklab), var(--sb-teal-700), var(--sb-teal-900));
  color: #FFFFFF;
}

.btn-indigo:hover:not(:disabled) {
  background: linear-gradient(135deg var(--in-oklab), var(--sb-teal-600), var(--sb-teal-800));
}

.btn-outline {
  background: #FFFFFF;
  color: var(--sb-text-primary);
  border-color: var(--sb-border-strong);
}

.btn-outline:hover:not(:disabled) {
  background: var(--sb-surface-alt);
  border-color: var(--sb-teal-600);
}

.btn-ghost-dark {
  background: rgba(255, 255, 255, 0.11);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.24);
}

.btn-ghost-dark:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.2);
}

/* Toast Notification Banner */
.sb-toast {
  position: fixed;
  inset-block-end: max(1.25rem, var(--safe-bottom));
  inset-inline-end: max(1.25rem, var(--safe-right));
  z-index: 9999;
  max-inline-size: min(92vw, 440px);
  padding: 0.9rem 1.15rem;
  border-radius: var(--radius-md);
  background: var(--sb-teal-950);
  color: #FFFFFF;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-inline-start: 4px solid var(--sb-teal-400);
  transform: translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.sb-toast.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.sb-toast[data-variant="error"] {
  border-inline-start-color: var(--sb-orange-500);
  background: #450A0A;
}