/* ===========================================
   LWM Design System — Apple-Inspired
   Dark mode default, light mode toggle
   =========================================== */

/* ----- Custom Properties (Tokens) ----- */
:root {
  /* Dark theme (default) */
  --bg-primary: #0A0A0A;
  --bg-section: #141414;
  --bg-card: #1C1C1E;
  --bg-elevated: #2C2C2E;
  --bg-overlay: rgba(0, 0, 0, 0.6);
  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-tertiary: #6E6E73;
  --accent: #0071e3;
  --accent-hover: #0077ED;
  --accent-active: #006EDB;
  --success: #30D158;
  --error: #FF453A;
  --warning: #FFD60A;
  --border: #38383A;
  --border-subtle: #2C2C2E;
  --focus-ring: rgba(0, 113, 227, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --toast-bg: #1C1C1E;
  --toast-text: #F5F5F7;
  --nav-bg: rgba(10, 10, 10, 0.8);
  --nav-border: rgba(255, 255, 255, 0.08);
  --scrollbar-track: #141414;
  --scrollbar-thumb: #38383A;
}

/* Light theme */
[data-theme="light"] {
  --bg-primary: #FFFFFF;
  --bg-section: #F5F5F7;
  --bg-card: #FFFFFF;
  --bg-elevated: #E8E8ED;
  --bg-overlay: rgba(0, 0, 0, 0.3);
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --accent: #0071e3;
  --accent-hover: #0077ED;
  --accent-active: #006EDB;
  --success: #34C759;
  --error: #FF3B30;
  --warning: #FF9F0A;
  --border: #D2D2D7;
  --border-subtle: #E8E8ED;
  --focus-ring: rgba(0, 113, 227, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --toast-bg: #1D1D1F;
  --toast-text: #FFFFFF;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-border: rgba(0, 0, 0, 0.08);
  --scrollbar-track: #F5F5F7;
  --scrollbar-thumb: #D2D2D7;
}

/* ----- Typography ----- */
:root {
  --font-english: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-bangla: 'Kalpurush', 'Hind Siliguri', 'Noto Sans Bengali',
    'SolaimanLipi', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
}

/* ----- Spacing (8px grid) ----- */
:root {
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-10: 64px;
  --space-12: 96px;
  --space-16: 128px;
}

/* ----- Layout ----- */
:root {
  --max-width-reading: 720px;
  --max-width-full: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 980px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 56px;
  --section-padding-desktop: var(--space-8);
  --section-padding-mobile: var(--space-6);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-english);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition-base), color var(--transition-base);
  min-height: 100dvh;
}

/* ----- Scrollbar ----- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-pill);
}

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

h1 { font-size: var(--text-4xl); margin-bottom: var(--space-5); }
h2 { font-size: var(--text-3xl); margin-bottom: var(--space-4); }
h3 { font-size: var(--text-2xl); margin-bottom: var(--space-3); }
h4 { font-size: var(--text-xl); margin-bottom: var(--space-2); }

p { margin-bottom: var(--space-4); text-wrap: pretty; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--accent-hover); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

b, strong { font-weight: 600; }
small { font-size: var(--text-sm); color: var(--text-secondary); }

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ----- Navigation ----- */
.lwm-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  z-index: 100;
  transition: background var(--transition-base);
}

.lwm-nav__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.lwm-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.lwm-nav__btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}
.lwm-nav__btn:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}
.lwm-nav__btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ----- Main Content Area ----- */
.lwm-main {
  padding-top: var(--nav-height);
  min-height: 100dvh;
}

.lwm-section {
  max-width: var(--max-width-reading);
  margin: 0 auto;
  padding: var(--section-padding-desktop) var(--space-5);
}

.lwm-section--wide {
  max-width: var(--max-width-full);
}

/* ----- Cards ----- */
.lwm-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.lwm-card:hover {
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.lwm-card + .lwm-card {
  margin-top: var(--space-4);
}

/* ----- Buttons ----- */
.lwm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-english);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}

.lwm-btn:active {
  transform: scale(0.97);
}

.lwm-btn--primary {
  background: var(--accent);
  color: #FFFFFF;
}
.lwm-btn--primary:hover {
  background: var(--accent-hover);
}
.lwm-btn--primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.lwm-btn--secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.lwm-btn--secondary:hover {
  background: var(--border);
}

.lwm-btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}
.lwm-btn--ghost:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.lwm-btn--danger {
  background: var(--error);
  color: #FFFFFF;
}
.lwm-btn--danger:hover {
  opacity: 0.9;
}

.lwm-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.lwm-btn--sm {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  min-height: 36px;
}

/* ----- Inputs ----- */
.lwm-input {
  width: 100%;
  font-family: var(--font-english);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.lwm-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.lwm-input::placeholder {
  color: var(--text-tertiary);
}

textarea.lwm-input {
  min-height: 100px;
  resize: vertical;
  font-family: var(--font-english);
  line-height: var(--leading-relaxed);
}

.lwm-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.lwm-label + .lwm-input {
  margin-top: var(--space-1);
}

.lwm-hint {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* ----- Select / Radio / Checkbox ----- */
.lwm-select {
  width: 100%;
  font-family: var(--font-english);
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23A1A1A6' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.lwm-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.lwm-radio-group,
.lwm-check-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lwm-radio,
.lwm-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.lwm-radio:hover,
.lwm-check:hover {
  background: var(--bg-section);
}

.lwm-radio input[type="radio"],
.lwm-check input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

/* ----- Password Gate ----- */
.lwm-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--space-5);
}

.lwm-gate__card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

.lwm-gate__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.lwm-gate__desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
}

.lwm-gate__input {
  width: 100%;
  font-size: var(--text-lg);
  text-align: center;
  letter-spacing: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-section);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}
.lwm-gate__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}
.lwm-gate__error {
  color: var(--error);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
  min-height: 1.4em;
}

/* ----- Progress ----- */
.lwm-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
}

.lwm-progress__bar {
  flex: 1;
  height: 4px;
  background: var(--bg-elevated);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.lwm-progress__fill {
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-pill);
  transition: width var(--transition-slow);
}

.lwm-progress__text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  white-space: nowrap;
  min-width: 36px;
  text-align: right;
}

/* ----- Section List (Module Index) ----- */
.lwm-section-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.lwm-section-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 56px;
}
.lwm-section-link:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.lwm-section-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.lwm-section-link__status {
  flex-shrink: 0;
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lwm-section-link__num {
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent);
  width: 32px;
  font-variant-numeric: tabular-nums;
}

.lwm-section-link__title {
  flex: 1;
  font-size: var(--text-base);
  font-weight: 500;
}

.lwm-section-link__duration {
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* ----- Module Grid ----- */
.lwm-module-grid {
  display: grid;
  gap: var(--space-4);
}

.lwm-module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.lwm-module-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.lwm-module-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.lwm-module-card__meta {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.lwm-module-card__progress {
  margin-top: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ----- Section Page ----- */
.lwm-section-header {
  margin-bottom: var(--space-6);
}

.lwm-section-header__meta {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.lwm-section-header__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
}

.lwm-screen {
  margin-bottom: var(--space-8);
  padding: var(--space-6);
  background: var(--bg-section);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.lwm-screen:first-child {
  background: transparent;
  border: none;
  padding: var(--space-10) var(--space-6);
  text-align: center;
}

.lwm-screen__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.lwm-screen__text {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-4);
}

/* ----- Quiz ----- */
.lwm-quiz {
  margin: var(--space-5) 0;
}

.lwm-quiz__question {
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.lwm-quiz__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.lwm-quiz__option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
}
.lwm-quiz__option:hover {
  background: var(--bg-section);
}

.lwm-quiz__option--selected {
  border-color: var(--accent);
  background: rgba(0, 113, 227, 0.08);
}

.lwm-quiz__option--correct {
  border-color: var(--success);
  background: rgba(48, 209, 88, 0.08);
}

.lwm-quiz__option--incorrect {
  border-color: var(--error);
  background: rgba(255, 69, 58, 0.08);
}

.lwm-quiz__feedback {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: none;
}

.lwm-quiz__feedback--visible {
  display: block;
}

.lwm-quiz__feedback--correct {
  background: rgba(48, 209, 88, 0.1);
  color: var(--success);
  border: 1px solid rgba(48, 209, 88, 0.2);
}

.lwm-quiz__feedback--incorrect {
  background: rgba(255, 69, 58, 0.1);
  color: var(--error);
  border: 1px solid rgba(255, 69, 58, 0.2);
}

.lwm-quiz__score {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-3);
}

/* ----- Flashcards ----- */
.lwm-flashcard {
  perspective: 1000px;
  margin: var(--space-5) 0;
  min-height: 200px;
}

.lwm-flashcard__inner {
  position: relative;
  width: 100%;
  min-height: 200px;
  cursor: pointer;
  transition: transform var(--transition-slow);
  transform-style: preserve-3d;
}
.lwm-flashcard__inner--flipped {
  transform: rotateY(180deg);
}

.lwm-flashcard__front,
.lwm-flashcard__back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  text-align: center;
}

.lwm-flashcard__back {
  transform: rotateY(180deg);
}

.lwm-flashcard__label {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.lwm-flashcard__content {
  font-size: var(--text-xl);
  font-weight: 600;
}

.lwm-flashcard__ratings {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-5);
  justify-content: center;
}

.lwm-flashcard__rating {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-section);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  min-width: 56px;
}
.lwm-flashcard__rating:hover {
  background: var(--bg-card);
}

/* ----- Tool Container ----- */
.lwm-tool {
  margin: var(--space-5) 0;
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.lwm-tool__title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.lwm-tool__intro {
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}

.lwm-tool__export {
  margin-top: var(--space-5);
  display: flex;
  justify-content: flex-end;
}

/* ----- Animations ----- */
.lwm-fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.lwm-fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes lwm-spin {
  to { transform: rotate(360deg); }
}

.lwm-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: lwm-spin 0.6s linear infinite;
}

@keyframes lwm-slide-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lwm-slide-up {
  animation: lwm-slide-up var(--transition-base) ease-out;
}

/* ----- Toast Notification ----- */
.lwm-toast {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--toast-bg);
  color: var(--toast-text);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 200;
  pointer-events: none;
  white-space: nowrap;
  max-width: 90vw;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lwm-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.lwm-toast--success {
  background: var(--success);
  color: #FFFFFF;
}

.lwm-toast--error {
  background: var(--error);
  color: #FFFFFF;
}

/* ----- Empty State / Fallback Messages ----- */
.lwm-empty {
  text-align: center;
  padding: var(--space-10) var(--space-5);
  color: var(--text-tertiary);
}

.lwm-empty__icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-4);
  opacity: 0.3;
}

.lwm-empty__text {
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}

.lwm-fallback {
  padding: var(--space-4);
  background: rgba(255, 214, 10, 0.08);
  border: 1px solid rgba(255, 214, 10, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin: var(--space-4) 0;
}

/* ----- Settings Page ----- */
.lwm-settings {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
}

.lwm-settings__group {
  margin-bottom: var(--space-6);
}

.lwm-settings__group-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border);
}

.lwm-settings__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  gap: var(--space-4);
}

.lwm-settings__label {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.lwm-settings__desc {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ----- Certificate ----- */
.lwm-certificate {
  max-width: 800px;
  margin: var(--space-8) auto;
  padding: var(--space-10);
  background: var(--bg-card);
  border: 2px solid var(--border);
  text-align: center;
}

.lwm-certificate__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

.lwm-certificate__subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.lwm-certificate__name {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--accent);
}

.lwm-certificate__body {
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.lwm-certificate__id {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* ----- Resources Page ----- */
.lwm-resources {
  max-width: var(--max-width-reading);
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
}

.lwm-resource-category {
  margin-bottom: var(--space-6);
}

.lwm-resource-category__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.lwm-resource-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.lwm-resource-item:hover {
  background: var(--bg-section);
}

.lwm-resource-item__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent);
}

.lwm-resource-item__title {
  font-weight: 500;
  margin-bottom: 2px;
}

.lwm-resource-item__desc {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* ----- Responsive ----- */
@media (max-width: 767px) {
  :root {
    --section-padding-desktop: var(--space-6);
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  .lwm-section {
    padding: var(--space-5) var(--space-4);
  }

  .lwm-screen {
    padding: var(--space-4);
  }

  .lwm-screen:first-child {
    padding: var(--space-8) var(--space-4);
  }

  .lwm-gate__card {
    padding: var(--space-6);
  }

  .lwm-module-grid {
    grid-template-columns: 1fr;
  }

  .lwm-certificate {
    padding: var(--space-6);
  }
}

@media (min-width: 768px) {
  .lwm-module-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .lwm-nav__title {
    max-width: 400px;
  }
}

@media (min-width: 1024px) {
  .lwm-module-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .lwm-nav__title {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ----- Print ----- */
@media print {
  .lwm-nav,
  .lwm-progress,
  .lwm-toast,
  .lwm-btn {
    display: none !important;
  }

  .lwm-main {
    padding-top: 0;
  }

  .lwm-section {
    max-width: none;
    padding: 0;
  }

  .lwm-screen {
    break-inside: avoid;
    border: none;
    padding: var(--space-4) 0;
  }

  .lwm-certificate {
    border: 2px solid #000;
    box-shadow: none;
  }
}

/* ----- Tool: Slider / Stepper ----- */
.lwm-slider-item {
  margin-bottom: var(--space-5);
}
.lwm-slider-item__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}
.lwm-slider-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.lwm-slider {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.lwm-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.lwm-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
}
.lwm-slider__value {
  min-width: 28px;
  text-align: center;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.lwm-slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}
.lwm-stepper {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.lwm-stepper__btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  min-width: 44px;
  min-height: 44px;
  transition: border-color var(--transition-fast);
}
.lwm-stepper__btn:hover {
  border-color: var(--accent);
}
.lwm-stepper__btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.lwm-stepper__value {
  min-width: 28px;
  text-align: center;
  font-size: var(--text-base);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.lwm-stepper--sm .lwm-stepper__btn {
  width: 32px;
  height: 32px;
  min-width: 36px;
  min-height: 36px;
  font-size: 16px;
}
.lwm-stepper--sm .lwm-stepper__value {
  font-size: var(--text-sm);
  min-width: 24px;
}

/* ----- Tool: Scorecard ----- */
.lwm-scorecard {
  overflow-x: auto;
  margin: var(--space-4) 0;
}
.lwm-scorecard__table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.lwm-scorecard__table th {
  text-align: left;
  padding: var(--space-3) var(--space-2);
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.lwm-scorecard__row td {
  padding: var(--space-3) var(--space-2);
  border-bottom: 1px solid var(--border);
}
.lwm-scorecard__name {
  font-weight: 500;
  color: var(--text-primary);
}
.lwm-scorecard__cell {
  text-align: center;
  min-width: 100px;
}
.lwm-scorecard__slider {
  width: 60px;
  vertical-align: middle;
}
.lwm-scorecard__slider-val {
  display: inline-block;
  min-width: 24px;
  text-align: center;
  font-weight: 600;
  color: var(--accent);
  font-size: var(--text-sm);
}
.lwm-scorecard__total {
  font-weight: 700;
  color: var(--accent);
  text-align: center;
}

/* ----- Tool: Archetype ----- */
.lwm-archetype-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
.lwm-archetype-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.lwm-archetype-card:hover {
  border-color: var(--accent);
}
.lwm-archetype-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.lwm-archetype-card--selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-card));
}
.lwm-archetype-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.lwm-archetype-card__icon {
  font-size: 24px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-section);
  border-radius: var(--radius-sm);
}
.lwm-archetype-card__title {
  font-weight: 600;
  font-size: var(--text-base);
  flex: 1;
}
.lwm-archetype-card__tag {
  font-size: var(--text-xs);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 2px 8px;
  border-radius: 999px;
}
.lwm-archetype-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}
.lwm-archetype-result {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-4);
  text-align: center;
}

/* ----- Tool: Matrix ----- */
.lwm-matrix {
  margin: var(--space-4) 0;
}
.lwm-matrix__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.lwm-matrix__quadrant {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  min-height: 100px;
  transition: border-color var(--transition-fast);
}
.lwm-matrix__quadrant:hover {
  border-color: var(--accent);
}
.lwm-matrix__quadrant-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}
.lwm-matrix__quadrant-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.lwm-matrix__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  cursor: default;
  user-select: none;
}
.lwm-matrix__item--draggable {
  cursor: grab;
}
.lwm-matrix__item--draggable:active {
  cursor: grabbing;
}
.lwm-matrix__remove {
  cursor: pointer;
  color: var(--danger, #ff3b30);
  font-size: 16px;
  line-height: 1;
  min-width: 24px;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lwm-matrix__pool {
  background: var(--bg-section);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.lwm-matrix__pool-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}
.lwm-matrix__pool-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.lwm-matrix__chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  min-height: 44px;
  transition: border-color var(--transition-fast);
}
.lwm-matrix__chip:hover {
  border-color: var(--accent);
}
.lwm-matrix__chip--selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

/* ----- Tool: Venn ----- */
.lwm-venn__progress {
  text-align: center;
}
.lwm-venn__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--transition-fast);
}
.lwm-venn__dot--active {
  background: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}
.lwm-venn__dot--done {
  background: var(--success, #34c759);
}
.lwm-venn__circle-title {
  font-size: var(--text-xl);
  font-weight: 700;
  text-align: center;
  margin: var(--space-4) 0 var(--space-2);
}
.lwm-venn__circle-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}
.lwm-venn__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.lwm-venn__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}
.lwm-venn__item-label {
  font-size: var(--text-sm);
  font-weight: 500;
  flex: 1;
}
.lwm-venn__slider {
  width: 80px;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.lwm-venn__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
}
.lwm-venn__slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
}
.lwm-venn__slider-val {
  min-width: 24px;
  text-align: center;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.lwm-venn--desktop .lwm-venn__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.lwm-venn__circle-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.lwm-venn--result {
  text-align: center;
  padding: var(--space-6) 0;
}

/* ----- Tool: Export buttons ----- */
.lwm-tool__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}
.lwm-tool__intro {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.lwm-tool__export {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
}