/* =============================================================
   KodNaMature — Dashboard CSS
   Panel ucznia | v1.0.0
   Stack: Vanilla JS + Firebase + Bunny.net
   ============================================================= */

/* ── FONTS ──────────────────────────────────────────────────── */
@import url('https://api.fontshare.com/v2/css?f[]=clash-display@300,400,500,600,700&f[]=general-sans@300,400,500,600,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ── DESIGN TOKENS ───────────────────────────────────────────── */
:root {
  --color-bg:           #060C16;
  --color-surface:      #0D1B2E;
  --color-surface-2:    #112240;
  --color-surface-3:    #1A2E4A;
  --color-locked:       #1A2A3A;

  --color-primary:        #6BB8E8;
  --color-primary-hover:  #4FA3D8;
  --color-primary-active: #3A8EC2;
  --color-primary-subtle: rgba(107, 184, 232, 0.08);
  --color-primary-subtle-hover: rgba(107, 184, 232, 0.14);

  --color-success:        #3DDC97;
  --color-success-subtle: rgba(61, 220, 151, 0.10);
  --color-warning:        #F5A623;
  --color-warning-subtle: rgba(245, 166, 35, 0.10);
  --color-error:          #E85555;
  --color-error-subtle:   rgba(232, 85, 85, 0.10);

  --color-text:   #EDF2F7;
  --color-muted:  #8BA7C2;
  --color-faint:  #3A5068;

  --color-border:       rgba(107, 184, 232, 0.12);
  --color-border-hover: rgba(107, 184, 232, 0.24);
  --color-divider:      rgba(107, 184, 232, 0.06);

  --font-display: 'Clash Display', 'Helvetica Neue', sans-serif;
  --font-body:    'General Sans', 'Helvetica Neue', sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --text-xs:   clamp(0.75rem,  0.70rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.82rem + 0.28vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.63vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.4rem  + 2vw,    3rem);
  --text-hero: clamp(2.5rem,   1.5rem  + 3.5vw,  4.5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.6), 0 4px 8px rgba(0,0,0,0.3);
  --shadow-primary: 0 4px 20px rgba(107, 184, 232, 0.2);

  --transition:      180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 320ms cubic-bezier(0.16, 1, 0.3, 1);

  --sidebar-width:     240px;
  --topbar-height:     60px;
  --bottom-nav-height: 64px;

  --content-sm:  640px;
  --content-md:  960px;
  --content-lg: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-padding-top: calc(var(--topbar-height) + var(--space-4));
  hanging-punctuation: first last;
}

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

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; text-wrap: balance; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }
textarea { resize: vertical; }

::selection { background: rgba(107, 184, 232, 0.25); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

/* ── LAYOUT ──────────────────────────────────────────────────── */
.app-layout { display: flex; min-height: 100dvh; background-color: var(--color-bg); }

/* ── SIDEBAR ─────────────────────────────────────────────────── */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-width); height: 100dvh;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex; flex-direction: column;
  z-index: 200;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  overflow-y: auto; overflow-x: hidden;
}
.sidebar.is-open { transform: translateX(0); box-shadow: var(--shadow-lg); }

.sidebar-logo {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
  flex-shrink: 0;
}
.sidebar-logo svg { animation: none !important; transform: none !important; }
.sidebar-logo-text { font-family: var(--font-display); font-size: var(--text-base); font-weight: 700; line-height: 1; white-space: nowrap; }
.sidebar-logo-text .logo-kod  { color: var(--color-primary); }
.sidebar-logo-text .logo-rest { color: var(--color-text); }

.sidebar-nav {
  flex: 1; padding: var(--space-4) var(--space-3);
  display: flex; flex-direction: column; gap: var(--space-1);
  list-style: none;
}
.sidebar-nav-item { display: block; }
.sidebar-nav-link {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  color: var(--color-muted);
  font-size: var(--text-sm); font-weight: 500;
  transition: color var(--transition), background-color var(--transition);
  white-space: nowrap;
}
.sidebar-nav-link svg { width: 18px; height: 18px; flex-shrink: 0; stroke-width: 1.75; }
.sidebar-nav-link:hover { color: var(--color-text); background-color: var(--color-primary-subtle); }
.sidebar-nav-link.active { color: var(--color-primary); background-color: var(--color-primary-subtle); font-weight: 600; }

.sidebar-user {
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid var(--color-divider);
  display: flex; flex-direction: column; gap: var(--space-2);
  flex-shrink: 0;
}
.sidebar-user-info { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-2); border-radius: var(--radius-lg); }
.sidebar-user-name { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }

.sidebar-streak {
  display: none; align-items: center; gap: var(--space-1);
  font-size: var(--text-xs); color: var(--color-warning); font-weight: 600;
  padding: var(--space-1) var(--space-2);
  background: rgba(245, 166, 35, 0.08);
  border-radius: var(--radius-full); white-space: nowrap;
}
.sidebar-streak.is-visible { display: flex; }

/* ── OVERLAY ─────────────────────────────────────────────────── */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(6, 12, 22, 0.75);
  backdrop-filter: blur(2px);
  z-index: 190; opacity: 0;
  transition: opacity var(--transition-slow);
}
.sidebar-overlay.is-visible { display: block; opacity: 1; }

/* ── TOPBAR ──────────────────────────────────────────────────── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  background-color: rgba(6, 12, 22, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--space-4);
  z-index: 100; gap: var(--space-4);
}
.topbar-left { display: flex; align-items: center; gap: var(--space-3); min-width: 0; }
.topbar-hamburger {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-muted);
  transition: color var(--transition), background-color var(--transition);
  flex-shrink: 0;
}
.topbar-hamburger:hover { color: var(--color-text); background-color: var(--color-primary-subtle); }
.topbar-hamburger svg { width: 20px; height: 20px; }
.topbar-title { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-right { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

.topbar-streak {
  display: none; align-items: center; gap: var(--space-1);
  font-size: var(--text-xs); font-weight: 700; color: var(--color-warning);
  padding: var(--space-1) var(--space-2);
  background: rgba(245, 166, 35, 0.10);
  border: 1px solid rgba(245, 166, 35, 0.20);
  border-radius: var(--radius-full); cursor: default; white-space: nowrap;
}
.topbar-streak.is-visible { display: flex; }

/* ── AVATAR ──────────────────────────────────────────────────── */
.avatar {
  width: 34px; height: 34px; border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: var(--text-xs); font-weight: 700;
  color: var(--color-bg); flex-shrink: 0; cursor: pointer;
  transition: opacity var(--transition);
  user-select: none; overflow: hidden;
  border: 2px solid var(--color-border);
  letter-spacing: 0.02em;
}
.avatar:hover { opacity: 0.85; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ── MAIN CONTENT ────────────────────────────────────────────── */
.main-content {
  flex: 1; min-width: 0;
  padding-top: var(--topbar-height);
  padding-bottom: var(--bottom-nav-height);
  transition: margin-left var(--transition-slow);
}
.view-root { padding: var(--space-6) var(--space-4); max-width: var(--content-md); margin: 0 auto; }

/* ── BOTTOM NAV ──────────────────────────────────────────────── */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: var(--bottom-nav-height);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex; align-items: stretch;
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}
.bottom-nav-item {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: var(--space-1); padding: var(--space-2);
  color: var(--color-faint);
  font-size: 10px; font-weight: 500;
  transition: color var(--transition);
  position: relative; cursor: pointer;
  border: none; background: none; text-decoration: none;
}
.bottom-nav-item svg { width: 20px; height: 20px; stroke-width: 1.75; }
.bottom-nav-item span { font-size: 10px; line-height: 1; }
.bottom-nav-item:hover,
.bottom-nav-item.active { color: var(--color-primary); }
.bottom-nav-item.active svg { stroke-width: 2.25; }

/* ── DESKTOP 768px+ ──────────────────────────────────────────── */
@media (min-width: 768px) {
  .sidebar { transform: translateX(0); box-shadow: none; }
  .topbar { left: var(--sidebar-width); }
  .topbar-hamburger { display: none; }
  .main-content { margin-left: var(--sidebar-width); padding-bottom: 0; }
  .view-root { padding: var(--space-8); }
  .bottom-nav { display: none; }
  .sidebar-overlay { display: none !important; }
}

/* ── KARTY ───────────────────────────────────────────────────── */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.card-sm { padding: var(--space-4); border-radius: var(--radius-lg); }
.card-hover {
  transition: background-color var(--transition), border-color var(--transition),
              box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
}
.card-hover:hover {
  background-color: var(--color-surface-2);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-4); gap: var(--space-3); }
.card-title { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; color: var(--color-text); }
.card-subtitle { font-size: var(--text-sm); color: var(--color-muted); margin-top: var(--space-1); }

/* ── PRZYCISKI ───────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2); padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-family: var(--font-body); font-size: var(--text-sm); font-weight: 600;
  white-space: nowrap; cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  border: 1.5px solid transparent;
  text-decoration: none; line-height: 1; user-select: none;
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; }

.btn-primary { background-color: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }
.btn-primary:hover:not(:disabled) { background-color: var(--color-primary-hover); border-color: var(--color-primary-hover); box-shadow: var(--shadow-primary); }

.btn-secondary { background-color: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-secondary:hover:not(:disabled) { background-color: var(--color-primary-subtle); }

.btn-ghost { background-color: transparent; color: var(--color-muted); border-color: transparent; }
.btn-ghost:hover:not(:disabled) { color: var(--color-text); background-color: var(--color-primary-subtle); }

.btn-danger { background-color: transparent; color: var(--color-error); border-color: transparent; }
.btn-danger:hover:not(:disabled) { background-color: var(--color-error-subtle); border-color: var(--color-error); }

.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); font-weight: 700; }
.btn-icon { padding: var(--space-2); border-radius: var(--radius-lg); width: 36px; height: 36px; }
.btn-icon svg { width: 18px; height: 18px; }

/* ── CHIPY ───────────────────────────────────────────────────── */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-1);
  padding: calc(var(--space-1) * 1.5) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: 600;
  white-space: nowrap; line-height: 1;
}
.chip svg { width: 12px; height: 12px; }
.chip-success { background-color: var(--color-success-subtle); color: var(--color-success); border: 1px solid rgba(61,220,151,0.20); }
.chip-warning { background-color: var(--color-warning-subtle); color: var(--color-warning); border: 1px solid rgba(245,166,35,0.20); }
.chip-error   { background-color: var(--color-error-subtle);   color: var(--color-error);   border: 1px solid rgba(232,85,85,0.20); }
.chip-primary { background-color: var(--color-primary-subtle); color: var(--color-primary); border: 1px solid rgba(107,184,232,0.20); }
.chip-locked  { background-color: rgba(58,80,104,0.25); color: var(--color-faint); border: 1px solid rgba(58,80,104,0.30); }
.chip-muted   { background-color: rgba(139,167,194,0.10); color: var(--color-muted); border: 1px solid rgba(139,167,194,0.15); }

/* ── PROGRESS BAR ────────────────────────────────────────────── */
.progress-bar { width: 100%; background-color: var(--color-surface-3); border-radius: var(--radius-full); overflow: hidden; height: 8px; }
.progress-bar-fill {
  height: 100%; background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 600ms cubic-bezier(0.16, 1, 0.3, 1);
  min-width: 0; max-width: 100%;
  position: relative; overflow: hidden;
}
.progress-bar-fill::after {
  content: ''; position: absolute; top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: progress-shine 2s ease-in-out infinite;
}
@keyframes progress-shine { 0% { left: -100%; } 100% { left: 200%; } }

.progress-bar-sm { height: 4px; }
.progress-bar-sm .progress-bar-fill::after { display: none; }
.progress-bar-success .progress-bar-fill { background-color: var(--color-success); }
.progress-bar-warning .progress-bar-fill { background-color: var(--color-warning); }

.progress-labeled { display: flex; flex-direction: column; gap: var(--space-2); }
.progress-label { display: flex; justify-content: space-between; align-items: center; }
.progress-label-text  { font-size: var(--text-sm); color: var(--color-muted); }
.progress-label-value { font-size: var(--text-sm); font-weight: 700; font-family: var(--font-mono); color: var(--color-primary); }

/* ── BADGE ───────────────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; justify-content: center; min-width: 18px; height: 18px; padding: 0 var(--space-1); background-color: var(--color-error); color: white; border-radius: var(--radius-full); font-size: 10px; font-weight: 800; line-height: 1; font-family: var(--font-mono); flex-shrink: 0; }
.badge-dot { width: 8px; height: 8px; min-width: 8px; padding: 0; border-radius: var(--radius-full); background-color: var(--color-error); }

/* ── EMPTY STATE ─────────────────────────────────────────────── */
.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: var(--space-16) var(--space-8); gap: var(--space-4); }
.empty-state-icon { width: 56px; height: 56px; color: var(--color-faint); margin-bottom: var(--space-2); }
.empty-state-icon svg { width: 100%; height: 100%; stroke-width: 1.5; }
.empty-state-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; color: var(--color-text); max-width: 36ch; }
.empty-state-desc  { font-size: var(--text-sm); color: var(--color-muted); max-width: 42ch; line-height: 1.6; }

/* ── SKELETON ────────────────────────────────────────────────── */
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
.skeleton {
  background: linear-gradient(90deg, var(--color-surface-2) 25%, var(--color-surface-3) 50%, var(--color-surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}
.skeleton-text    { height: 1em; margin-bottom: var(--space-2); border-radius: var(--radius-sm); }
.skeleton-text:last-child { width: 60%; }
.skeleton-heading { height: 1.5em; width: 45%; margin-bottom: var(--space-4); border-radius: var(--radius-sm); }
.skeleton-card    { height: 140px; border-radius: var(--radius-xl); }
.skeleton-avatar  { width: 34px; height: 34px; border-radius: var(--radius-full); flex-shrink: 0; }
.skeleton-button  { height: 40px; width: 120px; border-radius: var(--radius-full); }

/* ── ALERTY ──────────────────────────────────────────────────── */
.alert { display: flex; align-items: flex-start; gap: var(--space-3); padding: var(--space-4) var(--space-5); border-radius: var(--radius-lg); font-size: var(--text-sm); line-height: 1.5; border: 1px solid transparent; }
.alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.alert-success { background-color: var(--color-success-subtle); color: var(--color-success); border-color: rgba(61,220,151,0.20); }
.alert-warning  { background-color: var(--color-warning-subtle); color: var(--color-warning); border-color: rgba(245,166,35,0.20); }
.alert-error    { background-color: var(--color-error-subtle);   color: var(--color-error);   border-color: rgba(232,85,85,0.20); }
.alert-info     { background-color: var(--color-primary-subtle); color: var(--color-primary); border-color: rgba(107,184,232,0.20); }

/* ── STATUSY LEKCJI ──────────────────────────────────────────── */
.status-done   { color: var(--color-success); }
.status-active { color: var(--color-primary); }
.status-free   { color: var(--color-warning); }
.status-locked { color: var(--color-faint); opacity: 0.7; }

.lesson-row { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius-lg); transition: background-color var(--transition); cursor: pointer; }
.lesson-row:hover:not(.lesson-row--locked) { background-color: var(--color-primary-subtle); }
.lesson-row--locked  { opacity: 0.55; cursor: default; }
.lesson-row--active  { background-color: var(--color-primary-subtle); border: 1px solid var(--color-border-hover); }
.lesson-row-number   { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-faint); width: 28px; flex-shrink: 0; text-align: right; }
.lesson-row-icon     { width: 20px; height: 20px; flex-shrink: 0; }
.lesson-row-title    { flex: 1; font-size: var(--text-sm); font-weight: 500; color: var(--color-text); min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-row-meta     { font-size: var(--text-xs); color: var(--color-faint); font-family: var(--font-mono); flex-shrink: 0; }

/* ── TOAST ───────────────────────────────────────────────────── */
.toast-container { position: fixed; bottom: calc(var(--bottom-nav-height) + var(--space-4)); right: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); z-index: 1000; pointer-events: none; }
@media (min-width: 768px) { .toast-container { bottom: var(--space-6); right: var(--space-6); } }
.toast { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); background-color: var(--color-surface-3); border: 1px solid var(--color-border); border-radius: var(--radius-lg); font-size: var(--text-sm); font-weight: 500; box-shadow: var(--shadow-lg); pointer-events: all; animation: toast-in 300ms cubic-bezier(0.16,1,0.3,1) forwards; max-width: 320px; }
@keyframes toast-in  { from { transform: translateY(100%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes toast-out { from { transform: translateY(0);    opacity: 1; } to { transform: translateY(100%); opacity: 0; } }
.toast.toast-out { animation: toast-out 250ms ease-in forwards; }
.toast svg { width: 16px; height: 16px; flex-shrink: 0; }
.toast-success { border-left: 3px solid var(--color-success); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-error   { border-left: 3px solid var(--color-error); }

/* ── SEKCJA NAGŁÓWEK ─────────────────────────────────────────── */
.section-header   { margin-bottom: var(--space-5); }
.section-title    { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; color: var(--color-text); }
.section-subtitle { font-size: var(--text-sm); color: var(--color-muted); margin-top: var(--space-1); }
.section-divider  { height: 1px; background-color: var(--color-divider); margin: var(--space-6) 0; }

/* ── SIATKI ──────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
@media (min-width: 600px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } .grid-4 { grid-template-columns: repeat(4, 1fr); } }

/* ── FORMULARZE ──────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-label { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.form-input, .form-textarea { background-color: var(--color-surface-2); border: 1.5px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-3) var(--space-4); font-family: var(--font-body); font-size: var(--text-sm); color: var(--color-text); transition: border-color var(--transition), background-color var(--transition), box-shadow var(--transition); width: 100%; }
.form-input::placeholder, .form-textarea::placeholder { color: var(--color-faint); }
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--color-primary); background-color: var(--color-surface-3); box-shadow: 0 0 0 3px rgba(107,184,232,0.12); }
.form-textarea { min-height: 100px; resize: vertical; line-height: 1.6; }
.form-hint { font-size: var(--text-xs); color: var(--color-faint); }
.form-error-msg { font-size: var(--text-xs); color: var(--color-error); display: flex; align-items: center; gap: var(--space-1); }

/* ── TOGGLE ──────────────────────────────────────────────────── */
.toggle-row { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); padding: var(--space-4) 0; border-bottom: 1px solid var(--color-divider); }
.toggle-row:last-child { border-bottom: none; }
.toggle-info { flex: 1; }
.toggle-label { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); display: block; margin-bottom: var(--space-1); }
.toggle-desc  { font-size: var(--text-xs); color: var(--color-muted); line-height: 1.5; }
.toggle { position: relative; width: 44px; height: 24px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-slider { position: absolute; inset: 0; background-color: var(--color-faint); border-radius: var(--radius-full); cursor: pointer; transition: background-color var(--transition); }
.toggle-slider::before { content: ''; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; background-color: white; border-radius: 50%; transition: transform var(--transition); box-shadow: var(--shadow-sm); }
.toggle input:checked + .toggle-slider { background-color: var(--color-primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }
.toggle input:focus-visible + .toggle-slider { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ── BREADCRUMB ──────────────────────────────────────────────── */
.breadcrumb { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-5); flex-wrap: wrap; }
.breadcrumb-item { font-size: var(--text-xs); color: var(--color-muted); white-space: nowrap; }
.breadcrumb-item a { color: var(--color-muted); transition: color var(--transition); cursor: pointer; }
.breadcrumb-item a:hover { color: var(--color-primary); }
.breadcrumb-separator { color: var(--color-faint); font-size: var(--text-xs); }
.breadcrumb-item.active { color: var(--color-text); font-weight: 500; }

/* ── STAT KARTY ──────────────────────────────────────────────── */
.stat-card { background-color: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); }
.stat-label { font-size: var(--text-xs); font-weight: 600; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: var(--color-text); line-height: 1; }
.stat-delta { font-size: var(--text-xs); color: var(--color-muted); }

/* ── UTILITY ─────────────────────────────────────────────────── */
.text-primary { color: var(--color-primary) !important; }
.text-muted   { color: var(--color-muted)   !important; }
.text-faint   { color: var(--color-faint)   !important; }
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-error   { color: var(--color-error)   !important; }
.mono         { font-family: var(--font-mono) !important; font-size: 0.9em; }
.font-display { font-family: var(--font-display) !important; }
.fw-400 { font-weight: 400 !important; }
.fw-500 { font-weight: 500 !important; }
.fw-600 { font-weight: 600 !important; }
.fw-700 { font-weight: 700 !important; }
.text-xs   { font-size: var(--text-xs)   !important; }
.text-sm   { font-size: var(--text-sm)   !important; }
.text-base { font-size: var(--text-base) !important; }
.text-lg   { font-size: var(--text-lg)   !important; }
.text-xl   { font-size: var(--text-xl)   !important; }
.truncate  { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sr-only   { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }
.flex         { display: flex; }
.flex-col     { display: flex; flex-direction: column; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-start   { display: flex; align-items: center; justify-content: flex-start; }
.flex-gap     { display: flex; align-items: center; gap: var(--space-3); }
.flex-wrap    { flex-wrap: wrap; }
.flex-1       { flex: 1; }
.mt-auto { margin-top: auto; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.w-full  { width: 100%; }
.max-w-sm { max-width: var(--content-sm); }
.max-w-md { max-width: var(--content-md); }

/* ── PRINT ───────────────────────────────────────────────────── */
@media print {
  .sidebar, .topbar, .bottom-nav, .btn, .breadcrumb, .section-header, [data-no-print] { display: none !important; }
  .main-content { margin-left: 0 !important; padding: 0 !important; }
  body { background: white; color: black; }
  #certificate-card { page-break-inside: avoid; width: 100%; }
  @page { size: A4 landscape; margin: 0; }
}

/* ── REDUCED MOTION ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .progress-bar-fill::after { display: none; }
}

/* ── SCROLLBAR ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-faint); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-muted); }
/* ── QUIZ ─────────────────────────────────────────────── */
.quiz-view, .quiz-result-screen { max-width: 720px; }

.quiz-progress-wrap { margin-bottom: var(--space-5); }
.quiz-progress-info {
  display: flex; justify-content: space-between;
  margin-bottom: var(--space-2);
}
.quiz-progress-label { font-size: var(--text-xs); color: var(--color-muted); font-family: var(--font-mono); }

.quiz-card { display: flex; flex-direction: column; gap: var(--space-5); }
.quiz-question-header {
  display: flex; align-items: center;
  justify-content: space-between; gap: var(--space-3);
}
.quiz-question-num {
  font-size: var(--text-2xl); font-weight: 700;
  color: var(--color-primary); line-height: 1;
}
.quiz-question-text {
  font-family: var(--font-display); font-size: var(--text-lg);
  font-weight: 600; color: var(--color-text); line-height: 1.35;
}
.quiz-answers { display: flex; flex-direction: column; gap: var(--space-2); }
.quiz-option {
  display: flex; align-items: flex-start; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition);
  user-select: none;
}
.quiz-option:hover { background: var(--color-primary-subtle); border-color: var(--color-border-hover); }
.quiz-option--selected { background: var(--color-primary-subtle); border-color: var(--color-primary); }
.quiz-option-input { position: absolute; opacity: 0; pointer-events: none; }
.quiz-option-marker { font-size: var(--text-base); color: var(--color-faint); flex-shrink: 0; margin-top: 1px; }
.quiz-option--selected .quiz-option-marker { color: var(--color-primary); }
.quiz-option-text { font-size: var(--text-sm); color: var(--color-text); line-height: 1.5; }

.quiz-nav {
  display: flex; justify-content: space-between;
  align-items: center; padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.quiz-dots {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  margin-top: var(--space-4);
}
.quiz-dot {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  font-size: var(--text-xs); font-family: var(--font-mono);
  color: var(--color-muted); cursor: pointer;
  transition: all var(--transition);
}
.quiz-dot:hover          { border-color: var(--color-primary); color: var(--color-primary); }
.quiz-dot--answered      { background: var(--color-primary-subtle); border-color: var(--color-primary); color: var(--color-primary); }
.quiz-dot--current       { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); font-weight: 700; }

/* Wynik końcowy */
.quiz-result-card { display: flex; flex-direction: column; align-items: center; gap: var(--space-5); text-align: center; }
.quiz-result-icon { width: 72px; height: 72px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; font-size: 2rem; }
.quiz-result-heading { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-text); }
.quiz-result-sub { font-size: var(--text-base); color: var(--color-muted); }
.quiz-donut-wrap { margin: var(--space-2) 0; }
.quiz-result-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; justify-content: center; width: 100%; }

/* Omówienie odpowiedzi */
.quiz-review { width: 100%; text-align: left; display: flex; flex-direction: column; gap: var(--space-4); }
.quiz-review-title { font-family: var(--font-display); font-size: var(--text-base); font-weight: 700; color: var(--color-text); padding-bottom: var(--space-3); border-bottom: 1px solid var(--color-divider); }
.quiz-review-item { padding: var(--space-4); border-radius: var(--radius-lg); border: 1px solid var(--color-border); display: flex; flex-direction: column; gap: var(--space-2); }
.quiz-review-correct { border-color: rgba(61,220,151,0.25); background: var(--color-success-subtle); }
.quiz-review-wrong   { border-color: rgba(232,85,85,0.20);  background: var(--color-error-subtle); }
.quiz-review-q { display: flex; align-items: flex-start; gap: var(--space-2); font-size: var(--text-sm); font-weight: 600; color: var(--color-text); flex-wrap: wrap; }
.quiz-review-num { font-family: var(--font-mono); color: var(--color-faint); flex-shrink: 0; }
.quiz-review-opt { font-size: var(--text-xs); color: var(--color-muted); padding: 2px 0; }
.quiz-review-opt--hit    { color: var(--color-success); font-weight: 600; }
.quiz-review-opt--miss   { color: var(--color-error);   font-weight: 600; }
.quiz-review-opt--missed { color: var(--color-warning); }
.quiz-review-explanation { font-size: var(--text-xs); color: var(--color-primary); background: var(--color-primary-subtle); border-radius: var(--radius-md); padding: var(--space-2) var(--space-3); margin-top: var(--space-1); }
.quiz-review-answer-open { font-size: var(--text-sm); color: var(--color-muted); font-style: italic; }

/* Historia wyników */
.quiz-results-list { display: flex; flex-direction: column; gap: var(--space-3); }
.quiz-result-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.quiz-result-info { flex: 1; min-width: 0; }
.quiz-result-title { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.quiz-result-date  { font-size: var(--text-xs); color: var(--color-faint); font-family: var(--font-mono); margin-top: 2px; }
.quiz-result-score { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; flex-shrink: 0; }
.quiz-score-big  { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; line-height: 1; }
.quiz-score-frac { font-size: var(--text-xs); font-family: var(--font-mono); color: var(--color-muted); }
/* ── PROFIL (uzupełnienie) ──────────────────────────────── */
.profile-view    { max-width: 720px; }

.profile-name    { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; color: var(--color-text); }
.profile-email   { font-size: var(--text-sm); margin-top: var(--space-1); }
.profile-since,
.profile-streak  { font-size: var(--text-xs); color: var(--color-muted); margin-top: var(--space-1); }
.profile-avatar-info  { flex: 1; min-width: 0; }
.profile-avatar-upload { display: flex; flex-direction: column; gap: var(--space-1); align-items: flex-start; }

.profile-purchases { display: flex; flex-direction: column; gap: var(--space-3); }
.profile-purchase-item {
  display: flex; align-items: center;
  justify-content: space-between; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}
.profile-purchase-name { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.profile-purchase-meta { font-size: var(--text-xs); color: var(--color-muted); margin-top: 2px; }

.profile-section--danger { border-color: rgba(232, 85, 85, 0.20); }

.profile-delete-confirm {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-error-subtle);
  border: 1px solid rgba(232,85,85,0.25);
  border-radius: var(--radius-lg);
}
.profile-delete-confirm.hidden { display: none; }