/* ============================================================
 * SCPM: Sidebar navigare curs pe lectii fara Learning Mode
 * 
 * Layout cu doua coloane: sidebar (stanga) + continut principal (dreapta)
 * Stiluri similare cu Sensei Learning Mode dar standalone.
 * ============================================================ */

/* === CSS Variables === */
:root {
    --scpm-sidebar-width: 300px;
    --scpm-sidebar-bg: #f9fafb;
    --scpm-sidebar-border: #e2e4e7;
    --scpm-primary-color: #101517;
    --scpm-progress-bar-bg: #dcdcde;
    --scpm-progress-bar-fill: #30968B;
    --scpm-text-color: #1e1e1e;
    --scpm-text-muted: #787c82;
    --scpm-locked-color: #646970;
    --scpm-link-color: #101517;
    --scpm-current-bg: rgba(48, 150, 139, 0.08);
    --scpm-hover-bg: rgba(0, 0, 0, 0.04);
}

/* === Layout: Two-column wrapper === */
.scpm-lesson-wrapper {
    display: flex;
    position: relative;
    width: 100%;
    min-height: 400px;
}

/* === Sidebar === */
.scpm-lesson-sidebar {
    position: sticky;
    top: 32px; /* sub admin bar daca exista */
    align-self: flex-start;
    width: var(--scpm-sidebar-width);
    min-width: var(--scpm-sidebar-width);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    background: var(--scpm-sidebar-bg);
    border-right: 1px solid var(--scpm-sidebar-border);
    border-radius: 8px 0 0 8px;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: rgba(155, 155, 155, 0.4) transparent;
}

.scpm-lesson-sidebar::-webkit-scrollbar {
    width: 6px;
}

.scpm-lesson-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.scpm-lesson-sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(155, 155, 155, 0.3);
    border-radius: 20px;
}

/* Admin bar offset */
.admin-bar .scpm-lesson-sidebar {
    top: 64px; /* 32px admin bar + 32px spacing */
    max-height: calc(100vh - 96px);
}

/* === Sidebar Header (progress) === */
.scpm-sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--scpm-sidebar-border);
}

/* === Progress Section === */
.scpm-progress-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.scpm-course-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--scpm-primary-color);
    text-decoration: none;
    line-height: 1.4;
    display: block;
}

.scpm-course-title:hover {
    text-decoration: underline;
    color: var(--scpm-progress-bar-fill);
}

.scpm-progress-counter {
    font-size: 0.8125rem;
    color: var(--scpm-text-muted);
    line-height: 1.4;
}

.scpm-progress-bar {
    height: 6px;
    background-color: var(--scpm-progress-bar-bg);
    border-radius: 3px;
    overflow: hidden;
}

.scpm-progress-bar-inner {
    height: 100%;
    background-color: var(--scpm-progress-bar-fill);
    border-radius: 3px;
    transition: width 0.3s ease;
    min-width: 0;
}

/* === Sidebar Navigation === */
.scpm-sidebar-nav {
    padding: 16px 12px 24px;
}

.scpm-course-navigation {
    font-size: 0.875rem;
    line-height: 1.4;
}

/* === Module & Lesson Lists === */
.scpm-nav-modules,
.scpm-nav-lessons,
.scpm-nav-module-lessons {
    margin: 0;
    padding: 0;
    list-style: none;
}

.scpm-nav-modules {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.scpm-nav-modules + .scpm-nav-lessons {
    margin-top: 16px;
}

/* === Module === */
.scpm-nav-module {
    list-style: none;
}

.scpm-nav-module-header {
    margin-bottom: 4px;
}

.scpm-module-toggle {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 12px;
    color: var(--scpm-primary-color);
    border-radius: 6px;
    transition: background-color 0.15s ease;
}

.scpm-module-toggle:hover {
    background-color: var(--scpm-hover-bg);
}

.scpm-nav-module-title {
    flex: 1;
    font-size: 0.9375rem;
    font-weight: 600;
    margin: 0;
    text-align: left;
    line-height: 1.33;
}

.scpm-chevron {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.scpm-module-toggle:not(.scpm-collapsed) .scpm-chevron {
    transform: rotate(180deg);
}

/* Module lessons collapse */
.scpm-nav-module-lessons.scpm-collapsed {
    display: none;
}

/* Module summary */
.scpm-nav-module-summary {
    font-size: 0.75rem;
    color: var(--scpm-text-muted);
    padding: 0 8px;
    margin-top: 2px;
}

.scpm-nav-module-summary.scpm-hidden {
    display: none;
}

/* === Lesson === */
.scpm-nav-lesson {
    list-style: none;
    display: flex;
    align-items: center;
    border-radius: 6px;
    transition: background-color 0.15s ease;
}

.scpm-nav-lesson + .scpm-nav-lesson {
    margin-top: 2px;
}

.scpm-nav-lesson:hover {
    background-color: var(--scpm-hover-bg);
}

/* Current lesson highlight */
.scpm-nav-lesson.scpm-current-lesson {
    background-color: var(--scpm-current-bg);
}

.scpm-nav-lesson.scpm-current-lesson .scpm-nav-lesson-title {
    font-weight: 700;
}

/* Lesson link */
.scpm-nav-lesson-link {
    display: flex;
    align-items: center;
    flex: 1;
    padding: 8px;
    text-decoration: none;
    color: var(--scpm-link-color);
    gap: 8px;
    border-radius: 6px;
    line-height: 1.3;
}

.scpm-nav-lesson-link:hover {
    text-decoration: none;
    color: var(--scpm-progress-bar-fill);
}

/* Status icon */
.scpm-status-icon {
    flex-shrink: 0;
    opacity: 0.8;
}

.scpm-icon-complete {
    opacity: 1;
}

/* Lesson title */
.scpm-nav-lesson-title {
    flex: 1;
    font-size: 0.8125rem;
}

/* Locked lessons */
.scpm-nav-lesson.scpm-status-locked {
    opacity: 0.6;
}

.scpm-nav-lesson.scpm-status-locked .scpm-nav-lesson-link {
    color: var(--scpm-locked-color);
    cursor: default;
}

/* Lesson extra (quiz/preview label) */
.scpm-nav-lesson-extra {
    font-size: 0.75rem;
    color: var(--scpm-text-muted);
    padding-right: 8px;
    text-decoration: none;
    white-space: nowrap;
}

.scpm-nav-lesson-extra:hover {
    text-decoration: underline;
    color: var(--scpm-progress-bar-fill);
}

/* === Main Content === */
.scpm-lesson-main-content {
    flex: 1;
    min-width: 0;
    padding: 0 0 0 32px;
    box-sizing: border-box;
}

/* === Mobile Toggle Button === */
.scpm-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 1000;
    height: 44px;
    padding: 0 16px 0 12px;
    border-radius: 22px;
    background: var(--scpm-progress-bar-fill);
    color: #fff;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scpm-sidebar-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.scpm-toggle-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    line-height: 1;
}

/* === Responsive: Tablet & Mobile === */
@media screen and (max-width: 991px) {
    :root {
        --scpm-sidebar-width: 260px;
    }
}

@media screen and (max-width: 782px) {
    .scpm-lesson-wrapper {
        display: block;
        position: relative;
    }

    .scpm-sidebar-toggle {
        display: flex;
    }

    .scpm-lesson-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 300px;
        max-width: 85vw;
        max-height: none;
        z-index: 10000;
        border-radius: 0;
        border-right: 1px solid var(--scpm-sidebar-border);
        transform: translateX(-100%);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        box-shadow: none;
    }

    .admin-bar .scpm-lesson-sidebar {
        top: 46px; /* mobile admin bar */
        max-height: none;
    }

    .scpm-lesson-sidebar.scpm-sidebar-open {
        transform: translateX(0);
        box-shadow: 4px 0 16px rgba(0, 0, 0, 0.15);
    }

    .scpm-sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 9999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }

    .scpm-sidebar-overlay.scpm-overlay-visible {
        opacity: 1;
        pointer-events: all;
    }

    .scpm-lesson-main-content {
        padding: 0;
        width: 100%;
    }
}

@media screen and (max-width: 480px) {
    .scpm-lesson-sidebar {
        width: 280px;
    }

    .scpm-sidebar-header {
        padding: 16px 16px 12px;
    }

    .scpm-sidebar-nav {
        padding: 12px 8px 20px;
    }
}