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

/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
    --bg:        #FFFFFF;
    --surface:   #F7F7F5;
    --surface2:  #F0F0EC;
    --border:    #E4E4E0;
    --text:      #1A1A1A;
    --muted:     #8A8A8A;
    --accent:    #2563EB;
    --accent-h:  #1D4ED8;
    --accent-dim:#DBEAFE;
    --accent-border:#BFDBFE;
    --success:   #16A34A;
    --success-bg:#F0FDF4;
    --error:     #DC2626;
    --error-bg:  #FEF2F2;
    --warning:   #D97706;
    --warning-bg:#FFFBEB;
    --radius:    10px;
    --radius-lg: 16px;
    --shadow:    0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
}

/* ── Mode sombre ───────────────────────────────────────────────────────────── */
[data-theme="dark"] {
    --bg:        #111318;
    --surface:   #1C1F26;
    --surface2:  #242832;
    --border:    #2A2D36;
    --text:      #F0F0F0;
    --muted:     #6B7280;
    --accent:    #3B82F6;
    --accent-h:  #2563EB;
    --accent-dim:#1E3A5F;
    --accent-border:#1D4ED8;
    --success:   #22C55E;
    --success-bg:#052E16;
    --error:     #EF4444;
    --error-bg:  #2D0A0A;
    --warning:   #F59E0B;
    --warning-bg:#1C1200;
    --shadow:    0 1px 3px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.3);
}

/* ── Base ──────────────────────────────────────────────────────────────────── */
body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background .25s, color .25s;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

/* ── Screens ───────────────────────────────────────────────────────────────── */
.screen { display: none; min-height: 100vh; }
.screen.active { display: block; }
#auth-screen.active { display: flex; }

/* ── Auth ──────────────────────────────────────────────────────────────────── */
#auth-screen {
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    background: var(--bg);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 40px 36px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.04em;
    color: var(--text);
    margin-bottom: 8px;
}

.tagline {
    font-size: 0.875rem;
    color: var(--muted);
}

.auth-content {
    text-align: center;
}

.auth-content h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.auth-description {
    font-size: 0.8125rem;
    color: var(--muted);
    margin-bottom: 28px;
    line-height: 1.55;
}

.btn-google {
    width: 100%;
    height: 44px;
    padding: 0 20px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background .15s, border-color .15s, box-shadow .15s, transform .1s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-google:hover {
    background: var(--surface);
    border-color: #C8C8C4;
    box-shadow: var(--shadow);
}

.btn-google:active { transform: scale(.97); }

.auth-error {
    font-size: 0.8125rem;
    color: var(--error);
    margin-top: 12px;
    min-height: 20px;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn-primary {
    height: 44px;
    padding: 0 24px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background .15s, transform .1s;
    width: 100%;
}

.btn-primary:hover { background: var(--accent-h); }
.btn-primary:active { transform: scale(.97); }

.btn-secondary {
    height: 44px;
    padding: 0 20px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background .15s, transform .1s;
}

.btn-secondary:hover { background: var(--surface); }
.btn-secondary:active { transform: scale(.97); }

/* ── Main header ───────────────────────────────────────────────────────────── */
.main-header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left h1 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.streak-counter {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid #FDE68A;
    padding: 5px 14px;
    border-radius: 99px;
    font-size: 0.8125rem;
    font-weight: 600;
}

[data-theme="dark"] .streak-counter {
    border-color: #3D2700;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-stats {
    display: flex;
    gap: 8px;
    align-items: center;
}

.xp-display,
.level-display,
.hearts-display {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 5px 12px;
    border-radius: 99px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
}

.hearts-display { color: var(--error); }
.xp-display     { color: var(--warning); }

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    transition: background .15s, border-color .15s, transform .1s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover {
    background: var(--surface);
    border-color: #C8C8C4;
}

.theme-btn:active { transform: scale(.95); }

.theme-toggle { margin: 0; }

.user-menu { position: relative; }

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--accent);
    border: none;
    font-size: 18px;
    cursor: pointer;
    transition: opacity .15s, transform .1s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.user-avatar:hover { opacity: .88; }
.user-avatar:active { transform: scale(.95); }

.dropdown-menu {
    position: absolute;
    top: 44px;
    right: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 14px;
    min-width: 200px;
    display: none;
    animation: slideDown .15s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.dropdown-menu.active { display: block; }

.user-info {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.user-info p { font-size: 0.8125rem; margin: 3px 0; color: var(--text); }
.user-info p:first-child { font-weight: 600; }
.user-info p:last-child  { color: var(--muted); }

#logout-btn {
    width: 100%;
    height: 34px;
    padding: 0 12px;
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid #FECACA;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: background .15s;
}

[data-theme="dark"] #logout-btn { border-color: #5C1212; }
#logout-btn:hover { background: #FEE2E2; }
[data-theme="dark"] #logout-btn:hover { background: #3D0A0A; }

/* ── Module nav ────────────────────────────────────────────────────────────── */
.modules-nav {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0;
    overflow-x: auto;
}

.nav-wrapper {
    display: flex;
    gap: 2px;
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 10px 24px;
    min-width: max-content;
}

.module-btn {
    height: 36px;
    padding: 0 16px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--muted);
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
    transition: background .15s, color .15s, border-color .15s;
}

.module-btn:hover {
    background: var(--surface);
    color: var(--text);
}

.module-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent-border);
    color: var(--accent);
    font-weight: 600;
}

/* ── Level map ─────────────────────────────────────────────────────────────── */
.levels-container {
    max-width: 760px;
    margin: 0 auto;
    padding: 32px 20px 80px;
}

.progress-bar-container {
    margin-bottom: 32px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 18px 20px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--surface2);
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 99px;
    transition: width .5s cubic-bezier(.4,0,.2,1);
    width: 0%;
}

.progress-text {
    font-size: 0.8125rem;
    color: var(--muted);
    text-align: right;
}

.levels-path { position: relative; overflow: visible; }

.level-node {
    position: absolute;
    z-index: 1;
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
}

.level-node--animate {
    animation: fadeInUp .35s ease-out forwards;
    will-change: transform, opacity;
}

/* ── Carte niveau (bouton horizontal icône + texte) ────────────────────────── */
.level-btn {
    width: 100%;
    height: 68px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--surface);
    cursor: pointer;
    transition: background .18s, border-color .18s, box-shadow .18s, transform .1s;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    text-align: left;
    box-shadow: none;
}

.level-btn:hover:not(.locked) {
    background: var(--bg);
    border-color: var(--accent-border);
}

.level-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--surface);
    flex-shrink: 0;
    transition: background .15s;
}

.level-btn-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.level-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.level-xp {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--warning);
}

/* États */
.level-btn.completed {
    background: var(--success-bg);
    border-color: #BBF7D0;
}
.level-btn.completed .level-btn-icon {
    background: rgba(34,197,94,.15);
    color: var(--success);
}
.level-btn.completed .level-title { color: var(--success); }

[data-theme="dark"] .level-btn.completed { border-color: #14532D; }

.level-btn.current {
    background: var(--accent-dim);
    border-color: var(--accent-border);
    box-shadow: 0 0 0 3px rgba(37,99,235,.10);
}
.level-btn.current .level-btn-icon {
    background: rgba(37,99,235,.14);
    color: var(--accent);
}

.level-btn.locked {
    background: var(--surface);
    border-color: var(--border);
    cursor: not-allowed;
    opacity: .45;
    box-shadow: none;
}
.level-btn.locked:hover { transform: none; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Challenge screen ──────────────────────────────────────────────────────── */
.challenge-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 24px 20px 64px;
}

.challenge-header {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 16px;
}

.back-btn {
    height: 36px;
    padding: 0 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
    transition: background .15s, border-color .15s;
    flex-shrink: 0;
}

.back-btn:hover { background: var(--surface); border-color: #C8C8C4; }

.challenge-info {
    flex: 1;
    min-width: 0;
}

.challenge-info h2 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.challenge-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.challenge-difficulty {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid #BBF7D0;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
}

[data-theme="dark"] .challenge-difficulty { border-color: #14532D; }

.challenge-difficulty.medium {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: #FDE68A;
}

[data-theme="dark"] .challenge-difficulty.medium { border-color: #3D2700; }

.challenge-difficulty.hard {
    background: var(--error-bg);
    color: var(--error);
    border-color: #FECACA;
}

[data-theme="dark"] .challenge-difficulty.hard { border-color: #5C1212; }

.challenge-timer {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    height: 24px;
    padding: 0 10px;
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid #FDE68A;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
}

.challenge-timer.danger {
    background: var(--error-bg);
    color: var(--error);
    border-color: #FECACA;
    animation: pulse-timer 1s infinite;
}

@keyframes pulse-timer {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.04); }
}

.xp-reward {
    display: inline-flex;
    align-items: center;
    height: 30px;
    padding: 0 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 99px;
    font-size: 0.8125rem;
    font-weight: 600;
    flex-shrink: 0;
}

/* ── Challenge content card ────────────────────────────────────────────────── */
.challenge-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
}

.challenge-description {
    margin-bottom: 28px;
}

.challenge-description h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 10px;
}

.challenge-description p {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--text);
}

/* ── Hint ──────────────────────────────────────────────────────────────────── */
.challenge-hint { margin-bottom: 28px; }

.hint-btn {
    height: 36px;
    padding: 0 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background .15s, border-color .15s;
}

.hint-btn:hover { background: var(--surface); border-color: #C8C8C4; }

.hint-text {
    margin-top: 12px;
    padding: 14px 16px;
    background: var(--warning-bg);
    border: 1px solid #FDE68A;
    border-radius: var(--radius);
    font-size: 0.875rem;
    line-height: 1.55;
    color: var(--text);
    display: none;
}

[data-theme="dark"] .hint-text { border-color: #3D2700; }

.hint-text.visible { display: block; }

/* ── Challenge interface ───────────────────────────────────────────────────── */
.challenge-interface { margin-bottom: 28px; }

.input-challenge input,
.input-challenge textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    background: var(--surface);
    color: var(--text);
    outline: none;
    transition: border-color .15s, box-shadow .15s, background .15s;
    margin-bottom: 12px;
}

.input-challenge input:focus,
.input-challenge textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,.12);
    background: var(--bg);
}

.input-challenge textarea {
    min-height: 100px;
    resize: vertical;
}

.mcq-challenge {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mcq-option {
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    color: var(--text);
    text-align: left;
    transition: background .15s, border-color .15s, transform .1s;
}

.mcq-option:hover {
    background: var(--bg);
    border-color: var(--accent-border);
}

.mcq-option.selected {
    background: var(--bg);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.mcq-option:active { transform: scale(.99); }

.code-challenge {
    background: #0F0F0F;
    border: 1px solid #2A2A2A;
    padding: 18px;
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.code-challenge pre {
    color: #E4E4E4;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    line-height: 1.6;
}

.terminal-challenge {
    background: #0A0A0A;
    border: 1px solid #1E1E1E;
    color: #22C55E;
    padding: 18px;
    border-radius: var(--radius);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.terminal-output {
    margin-bottom: 10px;
    white-space: pre-wrap;
    line-height: 1.6;
}

.terminal-input {
    display: flex;
    align-items: center;
}

.terminal-input::before {
    content: '$ ';
    color: #22C55E;
    margin-right: 4px;
}

.terminal-input input {
    flex: 1;
    background: transparent;
    border: none;
    color: #22C55E;
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

/* ── Challenge actions ─────────────────────────────────────────────────────── */
.challenge-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.challenge-actions .btn-primary {
    width: auto;
    padding: 0 24px;
}

/* ── Feedback ──────────────────────────────────────────────────────────────── */
.challenge-feedback {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    line-height: 1.55;
    display: none;
}

.challenge-feedback.visible { display: block; }

.challenge-feedback.success {
    background: var(--success-bg);
    border: 1px solid #BBF7D0;
    color: var(--success);
}

[data-theme="dark"] .challenge-feedback.success { border-color: #14532D; }

.challenge-feedback.error {
    background: var(--error-bg);
    border: 1px solid #FECACA;
    color: var(--error);
}

[data-theme="dark"] .challenge-feedback.error { border-color: #5C1212; }

/* ── Modals ────────────────────────────────────────────────────────────────── */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px 16px;
    animation: fadeIn .15s ease;
}

.modal.active { display: flex; }

.modal-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 32px 28px 26px;
    text-align: center;
    max-width: 380px;
    width: 100%;
    animation: slideUp .18s ease;
}

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

.success-animation,
.failure-animation {
    font-size: 56px;
    margin-bottom: 18px;
    line-height: 1;
}

.modal-content h2 {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    color: var(--text);
}

.modal-content p {
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 24px;
    line-height: 1.55;
}

.rewards-earned {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin: 20px 0 24px;
}

.reward-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.reward-icon { font-size: 32px; }

.reward-value {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--warning);
}

.countdown-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--accent);
    margin: 16px 0;
}

.hint-message {
    font-size: 0.8125rem;
    color: var(--muted);
    margin-top: 8px;
}

/* ── Animations ────────────────────────────────────────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .main-header {
        padding: 0 14px;
        height: 56px;
    }

    .user-stats { display: none; }

    .header-center { flex: unset; }

    .auth-container { padding: 28px 22px; }

    .challenge-header {
        flex-wrap: wrap;
        padding: 14px 16px;
        gap: 12px;
    }

    .challenge-info h2 { white-space: normal; }

    .challenge-content { padding: 20px 16px; }

    .challenge-actions {
        flex-direction: column;
    }

    .challenge-actions button { width: 100%; }



    .nav-wrapper { padding: 8px 14px; }
}

@media (max-width: 480px) {
    .modal-content { padding: 28px 20px 22px; }
}

/* ── SVG global sizing ─────────────────────────────────────────────────────── */
svg { display: inline-block; vertical-align: middle; }

/* ── Auth logo ─────────────────────────────────────────────────────────────── */
.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 8px;
}
.auth-logo-icon {
    width: 30px;
    height: 30px;
    color: var(--accent);
    flex-shrink: 0;
}
.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text);
    margin: 0;
}

/* ── Header logo + title ───────────────────────────────────────────────────── */
.header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}
.header-logo-icon {
    width: 21px;
    height: 21px;
    color: var(--accent);
    flex-shrink: 0;
}
.header-title {
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text);
}

/* ── Stat pills (streak, hearts, xp, level) ───────────────────────────────── */
.stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    height: 28px;
    padding: 0 9px;
    border: 1px solid var(--border);
    border-radius: 99px;
    font-size: 0.8125rem;
    font-weight: 600;
    background: var(--surface);
    color: var(--text);
    white-space: nowrap;
}
.stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted);
}
.stat-label-lvl {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0;
    margin-right: 1px;
}
.stat-icon { width: 15px; height: 15px; flex-shrink: 0; }
.shield-icon { width: 14px; height: 14px; }

.flame-icon  { color: var(--warning); fill: var(--warning); }
.heart-icon  { color: var(--error); }
.star-icon   { color: var(--warning); }
.shield-icon { color: var(--accent); }

.streak-pill { border-color: #FDE68A; background: var(--warning-bg); }
.hearts-pill { border-color: #FECACA; background: var(--error-bg); }
.xp-pill     { border-color: #FDE68A; background: var(--warning-bg); }
.level-pill  { border-color: var(--accent-border); background: var(--accent-dim); }

[data-theme="dark"] .streak-pill { border-color: #431407; background: #1C0A00; }
[data-theme="dark"] .hearts-pill { border-color: #5C1212; background: var(--error-bg); }
[data-theme="dark"] .xp-pill     { border-color: #3D2700; background: var(--warning-bg); }
[data-theme="dark"] .level-pill  { border-color: #1E3A5F; background: #0F172A; }

/* ── Icon-only button (theme toggle) ──────────────────────────────────────── */
.icon-btn {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .15s, border-color .15s, transform .1s;
    flex-shrink: 0;
}
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn:hover  { background: var(--surface); border-color: #C8C8C4; color: var(--text); }
.icon-btn:active { transform: scale(.93); }

/* ── User avatar ───────────────────────────────────────────────────────────── */
.user-avatar {
    width: 34px; height: 34px;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity .15s, transform .1s;
    overflow: hidden;
}
.user-avatar svg { width: 18px; height: 18px; }
.user-avatar:hover  { background: var(--accent-dim); border-color: var(--accent-border); color: var(--accent); opacity: 1; }
.user-avatar:active { transform: scale(.93); }

/* ── Module buttons with SVG icons ────────────────────────────────────────── */
.module-icon {
    width: 15px; height: 15px;
    margin-right: 5px;
    vertical-align: -1px;
    flex-shrink: 0;
}
.module-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.module-icon { margin-right: 0; }

/* ── Level map connector ───────────────────────────────────────────────────── */
.levels-path {
    position: relative;
    isolation: isolate;
}

/* Nodes sit above the SVG connector */

/* SVG icon inside level-btn-icon */
.level-btn-icon svg { pointer-events: none; }

/* ── Back button with SVG ──────────────────────────────────────────────────── */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.back-btn svg { flex-shrink: 0; }

/* ── Hint button with SVG ──────────────────────────────────────────────────── */
.hint-btn svg { flex-shrink: 0; }

/* ── Modal icon wraps ──────────────────────────────────────────────────────── */
.modal-icon-wrap {
    width: 64px; height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}
.success-icon-wrap {
    background: var(--success-bg);
    border: 1px solid #BBF7D0;
    color: var(--success);
}
.failure-icon-wrap {
    background: var(--error-bg);
    border: 1px solid #FECACA;
    color: var(--error);
}
[data-theme="dark"] .success-icon-wrap { border-color: #14532D; }
[data-theme="dark"] .failure-icon-wrap { border-color: #5C1212; }

/* Remove old emoji animation targets */
.success-animation, .failure-animation { display: none; }

/* ── Reward icon in success modal ─────────────────────────────────────────── */
.reward-icon {
    width: 28px; height: 28px;
    color: var(--warning);
    margin-bottom: 4px;
}

/* ── Challenge timer SVG ──────────────────────────────────────────────────── */
.challenge-timer svg { flex-shrink: 0; }