/* ScientiaLux — Brand design tokens + base
 * All surfaces dark (Oxford Navy family — never pure black).
 * Type: Nunito Sans only (300/400/500/600/700/800).
 * Scales follow the golden ratio (φ ≈ 1.618).
 */

@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
  /* ---------- Brand palette ---------- */
  --sl-oxford:   #102142;   /* Primary dark — "use in place of black" */
  --sl-navy:     #1A2F5A;   /* Surface — slightly lighter than oxford */
  --sl-navy-2:   #223972;   /* Elevated surface */
  --sl-border:   #2A3E6C;   /* Subtle dividers */
  --sl-dark-blue:#244A96;   /* Primary action blue */
  --sl-sky:      #509BE8;   /* Accent / link blue */
  --sl-mindaro:  #D8FF71;   /* Signature lime accent */
  --sl-silvery:  #F0F5F7;   /* Body text / light surface */
  --sl-white:    #FFFFFF;

  --sl-text:         #F0F5F7;   /* ~14:1 on oxford */
  --sl-text-muted:   #A6B8D4;   /* ~7:1 — passes AA */
  --sl-text-dim:     #7386A8;   /* ~4.7:1 — passes AA for normal */
  --sl-danger:       #FF6B6B;
  --sl-success:      #8DE373;

  /* Translucent layers */
  --sl-surface-a:  rgba(255, 255, 255, 0.04);
  --sl-surface-b:  rgba(255, 255, 255, 0.08);
  --sl-hairline:   rgba(255, 255, 255, 0.08);

  /* Gradients — per Brand Board */
  --sl-grad-navy:    linear-gradient(135deg, #102142 0%, #244A96 100%);
  --sl-grad-sky:     linear-gradient(135deg, #244A96 0%, #509BE8 100%);
  --sl-grad-deep:    radial-gradient(circle at 20% 10%, #1A2F5A 0%, #102142 55%);
  --sl-glow-mindaro: 0 0 0 1px rgba(216, 255, 113, 0.4), 0 8px 32px rgba(216, 255, 113, 0.08);

  /* ---------- Golden-ratio scales ---------- */
  --phi: 1.618;

  --sp-1: 5px;
  --sp-2: 8px;
  --sp-3: 13px;
  --sp-4: 21px;
  --sp-5: 34px;
  --sp-6: 55px;
  --sp-7: 89px;

  --fs-xs:  11px;
  --fs-sm:  13px;
  --fs-md:  14px;   /* body default */
  --fs-lg:  17px;   /* md × ~1.2 */
  --fs-xl:  22px;   /* md × ~1.6 (near φ) */
  --fs-2xl: 36px;   /* lg × ~φ  */
  --fs-3xl: 56px;   /* 2xl × ~φ  — hero */

  /* Line heights */
  --lh-tight: 1.2;
  --lh-normal: 1.55;
  --lh-relaxed: 1.7;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;
  --radius-xl: 22px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow:    0 8px 24px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset + base ---------- */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Nunito Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  color: var(--sl-text);
  background: var(--sl-oxford);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(80, 155, 232, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 60% at 100% 100%, rgba(216, 255, 113, 0.04), transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--sl-sky);
  text-decoration: none;
  transition: color 140ms var(--ease);
}
a:hover { color: var(--sl-mindaro); }

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Subtle selection */
::selection {
  background: rgba(216, 255, 113, 0.28);
  color: var(--sl-white);
}

/* ---------- Form primitives ---------- */

.sl-input, .sl-select, .sl-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--sl-border);
  border-radius: var(--radius);
  color: var(--sl-text);
  padding: 11px 13px;
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  outline: none;
  transition: border-color 140ms var(--ease), background 140ms var(--ease), box-shadow 140ms var(--ease);
}
.sl-input::placeholder, .sl-textarea::placeholder { color: var(--sl-text-dim); }
.sl-input:focus, .sl-select:focus, .sl-textarea:focus {
  border-color: var(--sl-sky);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 3px rgba(80, 155, 232, 0.18);
}

/* Browser autofill — Chrome/Safari paint the background yellow-white and the
 * text color reverts to system defaults, which looks like Mindaro-on-cream and
 * is unreadable on our dark theme. Force the dark surface to stay put. */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active,
textarea:-webkit-autofill,
select:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px var(--sl-navy) inset !important;
  -webkit-text-fill-color: var(--sl-text) !important;
  caret-color: var(--sl-text) !important;
  transition: background-color 9999s ease-in-out 0s !important;
  border: 1px solid var(--sl-border) !important;
}
/* Firefox equivalent */
input:autofill, select:autofill, textarea:autofill {
  background: var(--sl-navy) !important;
  color: var(--sl-text) !important;
}

/* Native <select> dropdown lists. Browser popup UI is mostly OS-controlled,
 * but Chrome/Edge/Firefox on Windows honor these. Use !important to beat
 * anything inherited. */
select option,
select optgroup {
  background-color: #1A2F5A !important;   /* sl-navy resolved — keeps in native popup */
  color: #F0F5F7 !important;               /* sl-text resolved */
}
select option:checked {
  background-color: #223972 !important;    /* sl-navy-2 */
  color: #D8FF71 !important;               /* sl-mindaro */
  font-weight: 600;
}
select option:disabled {
  color: #7386A8 !important;
}

.sl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--sl-dark-blue);
  color: var(--sl-white);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 11px 21px;
  font-weight: 600;
  font-size: var(--fs-md);
  line-height: 1.2;
  cursor: pointer;
  transition: transform 80ms var(--ease), background 140ms var(--ease), box-shadow 140ms var(--ease);
  letter-spacing: 0.01em;
}
.sl-btn:hover { background: var(--sl-sky); box-shadow: 0 4px 16px rgba(80, 155, 232, 0.35); }
.sl-btn:active { transform: translateY(1px); }
.sl-btn:disabled { opacity: 0.5; cursor: not-allowed; background: var(--sl-navy-2); box-shadow: none; }

.sl-btn-primary {
  background: var(--sl-mindaro);
  color: var(--sl-oxford);
  font-weight: 700;
}
.sl-btn-primary:hover {
  background: var(--sl-mindaro);
  box-shadow: 0 0 0 2px rgba(216, 255, 113, 0.35), 0 6px 18px rgba(216, 255, 113, 0.18);
  filter: brightness(1.05);
}

.sl-btn-ghost {
  background: transparent;
  border-color: var(--sl-border);
  color: var(--sl-text);
}
.sl-btn-ghost:hover { background: var(--sl-surface-b); border-color: var(--sl-sky); box-shadow: none; }

.sl-btn-danger {
  background: transparent;
  border-color: rgba(255, 107, 107, 0.4);
  color: var(--sl-danger);
}
.sl-btn-danger:hover { background: rgba(255, 107, 107, 0.1); border-color: var(--sl-danger); box-shadow: none; }

.sl-btn-sm { padding: 6px 12px; font-size: var(--fs-sm); border-radius: var(--radius-sm); }

/* ---------- Card ---------- */

.sl-card {
  background: var(--sl-navy);
  border: 1px solid var(--sl-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* ---------- Logo + header ---------- */

.sl-brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  color: var(--sl-white);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--fs-xl);
  letter-spacing: -0.01em;
  line-height: 1;
}
.sl-brand-mark {
  width: 40px; height: 40px; flex-shrink: 0;
}
.sl-brand-word-scientia { color: var(--sl-white); font-weight: 500; }
.sl-brand-word-lux      { color: var(--sl-mindaro); font-weight: 700; }

.sl-brand-xl .sl-brand-mark { width: 56px; height: 56px; }
.sl-brand-xl { font-size: var(--fs-2xl); gap: 16px; }

/* ---------- Utility ---------- */

.sl-muted   { color: var(--sl-text-muted); }
.sl-dim     { color: var(--sl-text-dim); }
.sl-accent  { color: var(--sl-mindaro); }

.sl-section-title {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--sl-mindaro);
  margin: 0 0 var(--sp-3) 0;
}

.sl-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.5;
}
.sl-badge-admin    { background: rgba(216, 255, 113, 0.15); color: var(--sl-mindaro); border: 1px solid rgba(216, 255, 113, 0.25); }
.sl-badge-user     { background: rgba(160, 178, 209, 0.15); color: var(--sl-text-muted); border: 1px solid var(--sl-border); }
.sl-badge-ok       { background: rgba(141, 227, 115, 0.15); color: var(--sl-success); border: 1px solid rgba(141, 227, 115, 0.25); }
.sl-badge-warn     { background: rgba(255, 199, 96, 0.12); color: #FFC760; border: 1px solid rgba(255, 199, 96, 0.25); }
.sl-badge-danger   { background: rgba(255, 107, 107, 0.14); color: var(--sl-danger); border: 1px solid rgba(255, 107, 107, 0.25); }

/* ---------- Toasts ---------- */

.sl-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--sl-navy-2);
  color: var(--sl-text);
  padding: 12px 18px;
  border: 1px solid var(--sl-border);
  border-left: 3px solid var(--sl-sky);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  z-index: 200;
  box-shadow: var(--shadow-lg);
  animation: slIn 180ms var(--ease);
}
.sl-toast-ok    { border-left-color: var(--sl-success); }
.sl-toast-err   { border-left-color: var(--sl-danger); }

@keyframes slIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Modal ---------- */

.sl-modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(10, 20, 45, 0.72);
  backdrop-filter: blur(3px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
}
.sl-modal-backdrop.show { display: flex; }
.sl-modal {
  background: var(--sl-navy);
  border: 1px solid var(--sl-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  width: 440px;
  max-width: 100%;
  box-shadow: var(--shadow-lg);
}
.sl-modal h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: 0 0 var(--sp-3);
  color: var(--sl-white);
  letter-spacing: -0.01em;
}
.sl-modal label {
  display: block;
  color: var(--sl-text-muted);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: var(--sp-3) 0 6px;
}
.sl-modal-buttons {
  display: flex;
  gap: var(--sp-2);
  justify-content: flex-end;
  margin-top: var(--sp-4);
}