/*!
 * Pupil Zone LMS - Public Site
 * © 2026 Pupil Zone. All rights reserved.
 */

:root {
    --pz-blue: #0859c6;
    --pz-blue-light: #2e7cf6;
    --pz-blue-soft: #eef4ff;
    --ink: #0f172a;
    --muted: #5b6b85;
    --border: #e2e8f0;
    --code-bg: #0d1117;
    --code-text: #e6edf3;
    --code-keyword: #ff7b72;
    --code-string: #a5d6ff;
    --code-comment: #8b949e;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    color: var(--ink);
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
.mono { font-family: 'JetBrains Mono', monospace; }

/* ---------- Top nav ---------- */
.pz-topnav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 6vw;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: #fff;
    z-index: 20;
}
.pz-topnav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--ink);
}
.pz-topnav-brand img { height: 34px; width: auto; border-radius: 4px; }
.pz-topnav-brand .lms-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--pz-blue);
    background: var(--pz-blue-soft);
    padding: 2px 7px;
    border-radius: 5px;
}
.pz-topnav-links { display: flex; gap: 26px; }
.pz-topnav-links a { font-size: 0.9rem; font-weight: 600; color: var(--muted); }
.pz-topnav-links a:hover { color: var(--pz-blue); }
.pz-topnav-links a.pz-nav-cta {
    background: var(--pz-blue);
    color: #fff !important;
    padding: 7px 16px;
    border-radius: 20px;
}
.pz-topnav-links a.pz-nav-cta:hover { background: var(--pz-blue-light); }

.pz-nav-toggle-btn { display: none; }
.pz-mobile-only-label { display: none; }

@media (max-width: 768px) {
    .pz-nav-toggle-btn {
        display: flex; align-items: center; justify-content: center;
        width: 38px; height: 38px; border: none; background: var(--pz-blue-soft);
        color: var(--pz-blue); border-radius: 8px; font-size: 1.05rem; cursor: pointer;
    }
    .pz-mobile-only-label { display: inline; }
    .pz-topnav-links {
        display: none;
        position: absolute; top: 100%; left: 0; right: 0;
        background: #fff; flex-direction: column; align-items: flex-start;
        gap: 2px; padding: 10px 6vw 20px; border-bottom: 1px solid var(--border);
        box-shadow: 0 16px 30px -16px rgba(0,0,0,0.2);
    }
    .pz-topnav-links.open { display: flex; }
    .pz-topnav-links a { padding: 12px 8px; width: 100%; border-radius: 8px; }
    .pz-topnav-links a:hover { background: var(--pz-blue-soft); }
    .pz-topnav-links a.pz-nav-cta { width: auto; margin-top: 6px; }
    .pz-nav-user { flex-direction: column; align-items: flex-start; gap: 2px; width: 100%; }
    .pz-nav-user a { width: 100%; }
}

/* ---------- Footer ---------- */
.pz-site-footer {
    text-align: center;
    padding: 34px 6vw 40px;
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 60px;
}
.pz-site-footer a { color: var(--pz-blue); font-weight: 600; }

/* ---------- Courses / Subjects listing ---------- */
.pz-page-hero {
    padding: 50px 6vw 30px;
    max-width: 1100px;
    margin: 0 auto;
}
.pz-page-hero.pz-page-hero-wide { max-width: 1400px; }
.pz-page-hero h1 { font-size: 2.1rem; font-weight: 800; margin: 0 0 8px; }
.pz-page-hero p { color: var(--muted); font-size: 1.02rem; margin: 0; }

.pz-container { max-width: 1100px; margin: 0 auto; padding: 10px 6vw 60px; }
.pz-container-wide { max-width: 1400px; }

.pz-subject-block { margin-bottom: 46px; }
.pz-subject-block h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0 0 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.pz-subject-block .subject-desc { color: var(--muted); font-size: 0.92rem; margin: 0 0 18px; }

.pz-filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.pz-filter-pill {
    background: #fff; border: 1.5px solid var(--border); color: var(--ink);
    padding: 7px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600;
    cursor: pointer; transition: all 0.15s ease; display: inline-flex; align-items: center; gap: 6px;
}
.pz-filter-pill:hover { border-color: var(--pz-blue-light); }
.pz-filter-pill.active { background: var(--pz-blue); border-color: var(--pz-blue); color: #fff; }
.pz-filter-pill .count { font-size: 0.72rem; opacity: 0.75; }

.pz-course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
}
.pz-course-grid-wide { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.pz-course-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
    display: block;
}
.pz-course-card:hover { box-shadow: 0 14px 30px -12px rgba(8,89,198,0.25); transform: translateY(-2px); }
.pz-course-card .top-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; gap: 8px; }
.pz-course-card .level-badge {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--pz-blue);
    background: var(--pz-blue-soft);
    padding: 3px 9px;
    border-radius: 5px;
}
.pz-course-card .subject-tag {
    font-size: 0.72rem; font-weight: 600; color: var(--muted);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 55%;
}
.pz-course-card h3 { font-size: 1.08rem; font-weight: 700; margin: 0 0 8px; }
.pz-course-card p { font-size: 0.87rem; color: var(--muted); margin: 0 0 14px; line-height: 1.5; }
.pz-course-card .meta { font-size: 0.8rem; color: var(--muted); display: flex; gap: 14px; }

.pz-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
}

/* ---------- Course detail page ---------- */
.pz-course-header {
    background: var(--pz-blue-soft);
    padding: 40px 6vw;
}
.pz-course-header-inner { max-width: 1100px; margin: 0 auto; }
.pz-breadcrumb { font-size: 0.85rem; color: var(--muted); margin-bottom: 14px; }
.pz-breadcrumb a { color: var(--pz-blue); font-weight: 600; }
.pz-course-header h1 { font-size: 1.9rem; font-weight: 800; margin: 0 0 10px; }
.pz-course-header p { color: var(--muted); max-width: 640px; margin: 0; }

.pz-chapter-list { max-width: 800px; margin: 34px auto; padding: 0 6vw; }
.pz-chapter-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 14px;
    overflow: hidden;
}
.pz-chapter-card summary {
    padding: 16px 20px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
}
.pz-chapter-card summary::-webkit-details-marker { display: none; }
.pz-chapter-card summary .chevron { color: var(--muted); transition: transform 0.15s ease; }
.pz-chapter-card[open] summary .chevron { transform: rotate(90deg); }
.pz-chapter-card .lesson-count { font-size: 0.78rem; color: var(--muted); font-weight: 500; }
.pz-lesson-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    font-size: 0.92rem;
}
.pz-lesson-row:hover { background: #f8fafc; }
.pz-lesson-row i { color: var(--pz-blue); width: 16px; }
.pz-lesson-row .duration { margin-left: auto; font-size: 0.78rem; color: var(--muted); }

/* ---------- Course video + summary + chapter grid (replaces old accordion) ---------- */
.pz-video-wrap {
    position: relative; width: 100%; padding-top: 56.25%; /* 16:9 */
    border-radius: 14px; overflow: hidden; margin: 24px 0; background: #000;
    box-shadow: 0 20px 40px -20px rgba(8,89,198,0.25);
}
.pz-video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.pz-course-summary { margin: 24px 0; }
.pz-course-summary h2 { font-size: 1.15rem; font-weight: 700; margin: 0 0 10px; }
.pz-course-summary p { color: #374151; line-height: 1.7; font-size: 0.95rem; }

.pz-chapter-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 40px;
}
.pz-chapter-tile {
    text-align: left; background: #fff; border: 1px solid var(--border); border-radius: 12px;
    padding: 18px; cursor: pointer; font-family: 'Poppins', sans-serif; display: flex; flex-direction: column; gap: 6px;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.pz-chapter-tile:hover { box-shadow: 0 12px 26px -14px rgba(8,89,198,0.3); transform: translateY(-2px); border-color: var(--pz-blue-light); }
.pz-chapter-tile .num { font-family: 'JetBrains Mono', monospace; font-size: 0.7rem; font-weight: 700; color: var(--pz-blue); text-transform: uppercase; letter-spacing: 0.05em; }
.pz-chapter-tile .title { font-weight: 700; font-size: 0.98rem; color: var(--ink); line-height: 1.3; }
.pz-chapter-tile .meta { font-size: 0.78rem; color: var(--muted); }
.pz-chapter-tile .progress-track { background: #eef2f7; border-radius: 20px; height: 6px; overflow: hidden; margin-top: 4px; }
.pz-chapter-tile .progress-fill { background: var(--pz-blue); height: 100%; }
.pz-chapter-tile .progress-label { font-size: 0.72rem; color: var(--muted); }
.pz-chapter-tile.final { background: #fffbeb; border-color: #fde68a; }
.pz-chapter-tile.final .num { color: #b45309; }

.pz-modal-overlay {
    display: none; position: fixed; inset: 0; background: rgba(15,23,42,0.55); z-index: 100;
    align-items: center; justify-content: center; padding: 20px;
}
.pz-modal-overlay.open { display: flex; }
.pz-modal-box {
    background: #fff; border-radius: 16px; max-width: 480px; width: 100%; max-height: 80vh;
    display: flex; flex-direction: column; overflow: hidden; box-shadow: 0 30px 60px -20px rgba(0,0,0,0.3);
}
.pz-modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 20px; border-bottom: 1px solid var(--border);
}
.pz-modal-header h3 { font-size: 1.05rem; font-weight: 700; margin: 0; }
.pz-modal-close {
    background: #f1f5f9; border: none; width: 30px; height: 30px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--ink);
}
.pz-modal-body { overflow-y: auto; padding-bottom: 6px; }

@media (max-width: 600px) {
    .pz-chapter-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
    .pz-chapter-grid { grid-template-columns: 1fr; }
}

/* ---------- FAQ Chatbot Widget ---------- */
.pz-chat-fab {
    position: fixed; bottom: 22px; right: 22px; width: 56px; height: 56px; border-radius: 50%;
    background: var(--pz-blue); color: #fff; border: none; font-size: 1.3rem; cursor: pointer;
    box-shadow: 0 10px 25px -8px rgba(8,89,198,0.5); z-index: 200;
    display: flex; align-items: center; justify-content: center;
    transition: transform 0.15s ease;
}
.pz-chat-fab:hover { transform: scale(1.06); }

.pz-chat-panel {
    display: none; position: fixed; bottom: 90px; right: 22px; width: 340px; max-width: calc(100vw - 32px);
    height: 460px; max-height: calc(100vh - 130px); background: #fff; border-radius: 16px;
    box-shadow: 0 24px 50px -15px rgba(0,0,0,0.25); z-index: 200; flex-direction: column; overflow: hidden;
    border: 1px solid var(--border);
}
.pz-chat-panel.open { display: flex; }

.pz-chat-header {
    background: var(--pz-blue); color: #fff; padding: 14px 16px;
    display: flex; align-items: center; justify-content: space-between;
}
.pz-chat-header-sub { font-size: 0.72rem; opacity: 0.85; margin-top: 2px; }
.pz-chat-close { background: rgba(255,255,255,0.15); border: none; color: #fff; width: 26px; height: 26px; border-radius: 50%; cursor: pointer; }

.pz-chat-messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; background: #f8fafc; }
.pz-chat-bubble { max-width: 85%; padding: 9px 13px; border-radius: 14px; font-size: 0.86rem; line-height: 1.5; }
.pz-chat-bubble.bot { background: #fff; border: 1px solid var(--border); align-self: flex-start; border-bottom-left-radius: 4px; }
.pz-chat-bubble.user { background: var(--pz-blue); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.pz-chat-bubble.pz-chat-typing { color: var(--muted); font-style: italic; }

.pz-chat-whatsapp-btn {
    display: inline-flex; align-items: center; gap: 6px; margin-top: 8px;
    background: #25D366; color: #fff !important; padding: 7px 14px; border-radius: 20px;
    font-size: 0.8rem; font-weight: 600; text-decoration: none;
}

.pz-chat-input-row { display: flex; border-top: 1px solid var(--border); padding: 10px; gap: 8px; }
.pz-chat-input-row input {
    flex: 1; min-width: 0; border: 1px solid var(--border); border-radius: 20px; padding: 8px 14px; font-size: 0.86rem;
    font-family: 'Poppins', sans-serif;
}
.pz-chat-input-row input:focus { outline: none; border-color: var(--pz-blue); }
.pz-chat-input-row button {
    background: var(--pz-blue); color: #fff; border: none; width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
    flex-shrink: 0;
}

@media (max-width: 420px) {
    .pz-chat-panel { right: 16px; bottom: 84px; width: calc(100vw - 32px); }
    .pz-chat-fab { right: 16px; bottom: 16px; }
}

/* ---------- Lesson reading page ---------- */
.pz-lesson-shell { display: grid; grid-template-columns: 280px 1fr; max-width: 1200px; margin: 0 auto; }
.pz-lesson-sidebar {
    border-right: 1px solid var(--border);
    padding: 26px 18px;
    height: fit-content;
    position: sticky;
    top: 65px;
    max-height: calc(100vh - 65px);
    overflow-y: auto;
}
.pz-lesson-sidebar .course-name { font-size: 0.78rem; color: var(--muted); margin-bottom: 4px; }
.pz-lesson-sidebar .chapter-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--pz-blue);
    margin: 18px 0 8px;
}
.pz-lesson-sidebar .chapter-title:first-child { margin-top: 0; }
.pz-lesson-sidebar a.lesson-link {
    display: block;
    padding: 7px 10px;
    border-radius: 7px;
    font-size: 0.87rem;
    color: var(--ink);
    margin-bottom: 2px;
}
.pz-lesson-sidebar a.lesson-link:hover { background: var(--pz-blue-soft); }
.pz-lesson-sidebar a.lesson-link.active { background: var(--pz-blue); color: #fff; font-weight: 600; }

.pz-lesson-main { padding: 34px 5vw 60px; max-width: 760px; }
.pz-lesson-main .pz-breadcrumb { margin-bottom: 14px; }
.pz-lesson-main h1 { font-size: 1.8rem; font-weight: 800; margin: 0 0 22px; }
.pz-lesson-content { font-size: 1rem; line-height: 1.75; color: #1e293b; }
.pz-lesson-content h2 { font-size: 1.3rem; font-weight: 700; margin: 28px 0 12px; }
.pz-lesson-content h3 { font-size: 1.1rem; font-weight: 700; margin: 22px 0 10px; }
.pz-lesson-content p { margin: 0 0 16px; }
.pz-lesson-content pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 16px 18px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.86rem;
    margin: 0 0 18px;
}
.pz-lesson-content code {
    font-family: 'JetBrains Mono', monospace;
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.88em;
}
.pz-lesson-content pre code { background: none; padding: 0; }
.pz-lesson-content ul, .pz-lesson-content ol { margin: 0 0 16px; padding-left: 24px; }
.pz-lesson-content img { max-width: 100%; border-radius: 8px; }

.pz-read-aloud-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--pz-blue-soft); color: var(--pz-blue); border: none;
    padding: 9px 18px; border-radius: 8px; font-size: 0.85rem; font-weight: 600;
    cursor: pointer; margin-bottom: 16px;
}
.pz-read-aloud-btn:hover { filter: brightness(0.97); }
.pz-read-word.pz-reading-active {
    background: #fef08a;
    border-radius: 3px;
    padding: 0 1px;
    transition: background 0.1s ease;
}
.pz-audio-bar {
    display: none; position: fixed; bottom: 90px; right: 22px;
    background: #0f172a; color: #fff; padding: 12px 18px; border-radius: 30px;
    align-items: center; gap: 12px; z-index: 300;
    box-shadow: 0 10px 25px -8px rgba(0,0,0,0.4); font-size: 0.85rem;
}
.pz-audio-bar.show { display: flex; }
.pz-audio-bar button {
    background: rgba(255,255,255,0.15); border: none; color: #fff;
    width: 30px; height: 30px; border-radius: 50%; cursor: pointer;
}
@media (max-width: 420px) { .pz-audio-bar { right: 16px; bottom: 84px; } }

.pz-lesson-nav {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.pz-nav-btn {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 18px;
    font-size: 0.88rem;
    font-weight: 600;
    flex: 1;
    max-width: 47%;
}
.pz-nav-btn:hover { border-color: var(--pz-blue); color: var(--pz-blue); }
.pz-nav-btn.next { text-align: right; margin-left: auto; }
.pz-nav-btn .label { display: block; font-size: 0.72rem; color: var(--muted); font-weight: 500; margin-bottom: 2px; }

/* ---------- Practice questions (read-only preview) ---------- */
.pz-practice-block {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}
.pz-practice-block h2 { font-size: 1.2rem; font-weight: 700; margin: 0 0 16px; }
.pz-question-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 14px;
}
.pz-question-card .qtext { font-weight: 600; margin-bottom: 10px; }
.pz-question-card .qcode {
    background: var(--code-bg);
    color: var(--code-text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84rem;
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 12px;
    white-space: pre-wrap;
}
.pz-option-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 6px;
    font-size: 0.88rem;
    cursor: pointer;
}
.pz-option-row:hover { border-color: var(--pz-blue-light); }
.pz-option-row.revealed-correct { border-color: #16a34a; background: #f0fdf4; }
.pz-reveal-btn {
    font-size: 0.8rem;
    color: var(--pz-blue);
    font-weight: 600;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    margin-top: 4px;
}
.pz-explanation {
    display: none;
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--muted);
    background: #f8fafc;
    padding: 10px 14px;
    border-radius: 8px;
}
.pz-login-hint {
    background: var(--pz-blue-soft);
    color: var(--pz-blue);
    font-size: 0.78rem;
    padding: 8px 14px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 18px;
}

/* ---------- Auth pages (login/register) ---------- */
.pz-auth-wrap {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}
.pz-auth-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px 36px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 50px -20px rgba(8,89,198,0.15);
}
.pz-auth-card h1 { font-size: 1.4rem; font-weight: 800; margin: 0 0 6px; text-align: center; }
.pz-auth-card .sub { text-align: center; color: var(--muted); font-size: 0.88rem; margin: 0 0 24px; }
.pz-form-group { margin-bottom: 16px; }
.pz-form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.pz-form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 9px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.92rem;
}
.pz-form-group input:focus { outline: none; border-color: var(--pz-blue); }
.pz-auth-btn {
    width: 100%;
    background: var(--pz-blue);
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 6px;
    cursor: pointer;
}
.pz-auth-btn:hover { background: var(--pz-blue-light); }
.pz-alert-error {
    background: #fef2f2;
    color: #b91c1c;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 16px;
}
.pz-alert-success {
    background: #f0fdf4;
    color: #15803d;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 16px;
}
.pz-auth-switch { text-align: center; font-size: 0.85rem; color: var(--muted); margin: 18px 0 0; }
.pz-auth-switch a { color: var(--pz-blue); font-weight: 600; }

/* ---------- Nav auth state ---------- */
.pz-nav-user {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}
.pz-nav-user .chip {
    background: var(--pz-blue-soft);
    color: var(--pz-blue);
    padding: 5px 12px;
    border-radius: 20px;
}
.pz-nav-user a.logout { color: var(--muted); }
.pz-nav-user a.logout:hover { color: var(--pz-blue); }

/* ---------- Dashboard ---------- */
.pz-dashboard-hero { padding: 40px 6vw 10px; max-width: 1100px; margin: 0 auto; }
.pz-dashboard-hero h1 { font-size: 1.7rem; font-weight: 800; margin: 0 0 4px; }
.pz-dashboard-hero p { color: var(--muted); margin: 0; }

.pz-progress-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 16px;
}
.pz-progress-card .top-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.pz-progress-card h3 { font-size: 1.05rem; font-weight: 700; margin: 0; }
.pz-progress-bar-track { background: #eef2f7; border-radius: 20px; height: 10px; overflow: hidden; margin-bottom: 10px; }
.pz-progress-bar-fill { background: linear-gradient(90deg, var(--pz-blue), var(--pz-blue-light)); height: 100%; border-radius: 20px; }
.pz-progress-meta { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--muted); }
.pz-continue-btn {
    display: inline-block;
    margin-top: 12px;
    background: var(--pz-blue);
    color: #fff;
    padding: 9px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}
.pz-continue-btn:hover { background: var(--pz-blue-light); }

/* ---------- Lesson completion + quiz submission (Phase 3) ---------- */
.pz-mark-complete-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--pz-blue-soft);
    color: var(--pz-blue);
    border: none;
    padding: 9px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    margin: 18px 0;
}
.pz-mark-complete-btn.completed { background: #dcfce7; color: #15803d; }
.pz-mark-complete-btn:hover { filter: brightness(0.97); }

.pz-sidebar .lesson-link { position: relative; }
.pz-lesson-sidebar a.lesson-link .check { color: #16a34a; margin-right: 4px; }

.pz-quiz-submit-btn {
    background: var(--pz-blue);
    color: #fff;
    border: none;
    padding: 10px 22px;
    border-radius: 9px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    margin-top: 6px;
}
.pz-quiz-submit-btn:hover { background: var(--pz-blue-light); }
.pz-quiz-score-banner {
    background: var(--pz-blue-soft);
    color: var(--pz-blue);
    padding: 14px 18px;
    border-radius: 10px;
    font-weight: 700;
    margin-bottom: 16px;
    display: none;
}
.pz-option-row input[type="radio"] { margin-right: 4px; }

.pz-search-form {
    position: relative;
    max-width: 480px;
    margin-top: 18px;
}
.pz-search-form i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
}
.pz-search-form input {
    width: 100%;
    padding: 12px 16px 12px 42px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
}
.pz-search-form input:focus { outline: none; border-color: var(--pz-blue); }

.pz-search-result-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 8px;
}
.pz-search-result-row:hover { border-color: var(--pz-blue-light); background: #f8fafc; }
.pz-search-result-row i { color: var(--pz-blue); }

.pz-sidebar-toggle-btn { display: none; }
.pz-sidebar-overlay { display: none; }
.pz-sidebar-close-btn { display: none; }

.pz-bookmark-btn {
    background: none;
    border: none;
    color: var(--muted);
    font-size: 1.1rem;
    cursor: pointer;
    vertical-align: middle;
    margin-left: 8px;
    padding: 4px 8px;
    border-radius: 6px;
}
.pz-bookmark-btn:hover { background: var(--pz-blue-soft); }
.pz-bookmark-btn.active { color: var(--pz-blue); }

@media (max-width: 900px) {
    .pz-lesson-shell { grid-template-columns: 1fr; }
    .pz-lesson-main { order: 1; padding-top: 20px; }
    .pz-sidebar-toggle-btn {
        display: flex; align-items: center; gap: 8px;
        background: var(--pz-blue-soft); color: var(--pz-blue); border: none;
        padding: 10px 16px; border-radius: 8px; font-weight: 600; font-size: 0.85rem;
        margin: 16px 5vw 0; cursor: pointer;
    }
    .pz-sidebar-overlay {
        display: none;
        position: fixed; inset: 0; background: rgba(15,23,42,0.5);
        z-index: 40; opacity: 0; transition: opacity 0.2s ease;
    }
    .pz-sidebar-overlay.open { display: block; opacity: 1; }
    .pz-lesson-sidebar {
        position: fixed; top: 0; left: 0; bottom: 0; width: 82%; max-width: 320px;
        background: #fff; z-index: 50; max-height: 100vh; overflow-y: auto;
        border-right: 1px solid var(--border);
        transform: translateX(-100%); transition: transform 0.25s ease;
        padding: 20px 18px;
    }
    .pz-lesson-sidebar.open { transform: translateX(0); }
    .pz-sidebar-close-btn {
        display: flex; align-items: center; justify-content: center;
        width: 32px; height: 32px; border-radius: 50%; border: none;
        background: #f1f5f9; color: var(--ink); font-size: 1rem;
        margin-bottom: 14px; cursor: pointer;
    }
}