/* ════════════════════════════════════════════════
   LectureDigest — Study Plan Styles
   ════════════════════════════════════════════════ */

.sp-page {
    min-height: 100vh;
    padding: 24px 16px 80px;
    position: relative;
    z-index: 1;
}

.sp-inner {
    max-width: 900px;
    margin: 0 auto;
}

/* ── Header ── */
.sp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
}

.sp-header-center {
    text-align: center;
    flex: 1;
}

.sp-page-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary, #f1f5f9);
    margin: 0;
}

.sp-page-sub {
    font-size: 13px;
    color: var(--text-secondary, #94a3b8);
    margin: 4px 0 0;
}

.sp-header-actions {
    min-width: 100px;
    text-align: right;
}

.sp-regen-btn {
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: #a78bfa;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-regen-btn:hover {
    background: rgba(139, 92, 246, 0.25);
    border-color: rgba(139, 92, 246, 0.5);
}

/* ── Config Panel ── */
.sp-config {
    background: rgba(30, 30, 58, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.sp-config-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary, #f1f5f9);
    margin: 0 0 20px;
}

.sp-config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.sp-config-full {
    grid-column: 1 / -1;
}

.sp-config-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sp-config-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #94a3b8);
}

.sp-config-field input[type="range"] {
    width: 100%;
    accent-color: #8b5cf6;
}

.sp-config-field input[type="text"] {
    background: rgba(15, 15, 30, 0.5);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--text-primary, #f1f5f9);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.sp-config-field input[type="text"]:focus {
    border-color: rgba(139, 92, 246, 0.5);
}

.sp-range-val {
    font-size: 20px;
    font-weight: 800;
    color: #a78bfa;
    text-align: center;
}

.sp-generate-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-generate-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}

.sp-generate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ── Loading ── */
.sp-loading {
    text-align: center;
    padding: 60px 20px;
}

.sp-loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(139, 92, 246, 0.2);
    border-top-color: #8b5cf6;
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spSpin 0.8s linear infinite;
}

@keyframes spSpin {
    to { transform: rotate(360deg); }
}

.sp-loading-text {
    color: var(--text-secondary, #94a3b8);
    font-size: 14px;
}

/* ── Overview Card ── */
.sp-overview-card {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(59, 130, 246, 0.08));
    border: 1px solid rgba(139, 92, 246, 0.25);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.sp-overview-header {
    margin-bottom: 12px;
}

.sp-plan-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary, #f1f5f9);
    margin: 0 0 8px;
}

.sp-plan-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary, #94a3b8);
}

.sp-overview-text {
    font-size: 14px;
    color: var(--text-secondary, #cbd5e1);
    line-height: 1.6;
    margin: 0;
}

/* ── Priority Videos ── */
.sp-section {
    margin-bottom: 24px;
}

.sp-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary, #f1f5f9);
    margin: 0 0 12px;
}

.sp-priority-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sp-priority-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(30, 30, 58, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    transition: border-color 0.2s;
}

.sp-priority-item:hover {
    border-color: rgba(139, 92, 246, 0.3);
}

.sp-priority-high { border-left: 3px solid #f87171; }
.sp-priority-medium { border-left: 3px solid #fbbf24; }
.sp-priority-low { border-left: 3px solid #34d399; }

.sp-priority-icon {
    font-size: 18px;
}

.sp-priority-info {
    flex: 1;
}

.sp-priority-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #f1f5f9);
}

.sp-priority-reason {
    font-size: 12px;
    color: var(--text-secondary, #94a3b8);
    margin-top: 2px;
}

/* ── Week Tabs ── */
.sp-weeks-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.sp-week-tab {
    padding: 8px 18px;
    background: rgba(30, 30, 58, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    color: var(--text-secondary, #94a3b8);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.sp-week-tab:hover {
    border-color: rgba(139, 92, 246, 0.3);
    color: var(--text-primary, #f1f5f9);
}

.sp-week-tab.sp-week-active {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.5);
    color: #a78bfa;
}

/* ── Schedule ── */
.sp-week-theme {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 600;
    color: #a78bfa;
    margin-bottom: 16px;
}

.sp-day-card {
    background: rgba(30, 30, 58, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 12px;
    transition: border-color 0.2s;
}

.sp-day-card.sp-day-complete {
    border-color: rgba(52, 211, 153, 0.3);
    background: rgba(52, 211, 153, 0.05);
}

.sp-day-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.sp-day-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary, #f1f5f9);
}

.sp-day-badge {
    font-size: 12px;
    font-weight: 600;
    color: #34d399;
    background: rgba(52, 211, 153, 0.1);
    padding: 4px 10px;
    border-radius: 8px;
}

/* ── Tasks ── */
.sp-tasks {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sp-task {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(15, 15, 30, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-task:hover {
    background: rgba(139, 92, 246, 0.06);
    border-color: rgba(139, 92, 246, 0.2);
}

.sp-task.sp-task-done {
    opacity: 0.6;
    background: rgba(52, 211, 153, 0.04);
}

.sp-task.sp-task-done .sp-task-header,
.sp-task.sp-task-done .sp-task-desc {
    text-decoration: line-through;
}

.sp-task-check {
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.sp-task-body {
    flex: 1;
    min-width: 0;
}

.sp-task-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.sp-task-type {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #f1f5f9);
}

.sp-task-duration {
    font-size: 11px;
    color: var(--text-secondary, #94a3b8);
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 6px;
    white-space: nowrap;
}

.sp-task-desc {
    font-size: 12px;
    color: var(--text-secondary, #94a3b8);
    margin-top: 4px;
    line-height: 1.4;
}

.sp-task-priority {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #fbbf24;
    flex-shrink: 0;
    margin-top: 6px;
}

.sp-task-priority.sp-dot-high { background: #f87171; }
.sp-task-priority.sp-dot-low { background: #34d399; }

/* ── Milestones ── */
.sp-milestones {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sp-milestone {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(30, 30, 58, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
}

.sp-milestone-icon {
    font-size: 20px;
}

.sp-milestone-info {
    flex: 1;
}

.sp-milestone-target {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #f1f5f9);
}

.sp-milestone-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-secondary, #94a3b8);
    margin-top: 4px;
}

/* ── Recommendations ── */
.sp-recs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sp-rec-item {
    padding: 10px 14px;
    background: rgba(59, 130, 246, 0.06);
    border: 1px solid rgba(59, 130, 246, 0.12);
    border-radius: 10px;
    font-size: 13px;
    color: var(--text-secondary, #cbd5e1);
    line-height: 1.5;
}

/* ── Progress Bar ── */
.sp-progress-bar-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.sp-progress-bar {
    flex: 1;
    height: 10px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 5px;
    overflow: hidden;
}

.sp-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #8b5cf6, #6d28d9);
    border-radius: 5px;
    transition: width 0.4s ease;
}

.sp-progress-text {
    font-size: 14px;
    font-weight: 700;
    color: #a78bfa;
    min-width: 40px;
}

.sp-completed-tasks {
    font-size: 12px;
    color: var(--text-secondary, #94a3b8);
}

/* ── Empty State ── */
.sp-empty {
    text-align: center;
    padding: 60px 20px;
}

.sp-empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.sp-empty h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary, #f1f5f9);
    margin: 0 0 8px;
}

.sp-empty p {
    font-size: 14px;
    color: var(--text-secondary, #94a3b8);
    margin: 0 0 24px;
}

/* ── Dashboard Banner ── */
.sp-banner {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.sp-banner-create {
    background: rgba(139, 92, 246, 0.08);
    border: 1px dashed rgba(139, 92, 246, 0.3);
}

.sp-banner-create:hover {
    background: rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.5);
}

.sp-banner-active {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.sp-banner-active:hover {
    background: rgba(139, 92, 246, 0.12);
}

.sp-banner-icon {
    font-size: 24px;
}

.sp-banner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sp-banner-text strong {
    font-size: 14px;
    color: var(--text-primary, #f1f5f9);
}

.sp-banner-text span {
    font-size: 12px;
    color: var(--text-secondary, #94a3b8);
}

.sp-banner-progress {
    width: 60px;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}

.sp-banner-fill {
    height: 100%;
    background: #8b5cf6;
    border-radius: 3px;
    transition: width 0.3s;
}

.sp-banner-arrow {
    font-size: 18px;
    color: var(--text-secondary, #94a3b8);
}

/* ── Responsive ── */
@media (max-width: 640px) {
    .sp-config-grid {
        grid-template-columns: 1fr;
    }

    .sp-header {
        flex-wrap: nowrap;
        gap: 0;
    }

    .sp-header-center {
        flex: 1;
        text-align: center;
    }

    .sp-header-actions {
        min-width: auto;
    }

    .sp-plan-meta {
        justify-content: center;
    }

    .sp-task-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

/* ── Light mode ── */
.light-mode .sp-config,
.light-mode .sp-day-card,
.light-mode .sp-priority-item,
.light-mode .sp-milestone {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(0, 0, 0, 0.08);
}

.light-mode .sp-task {
    background: rgba(248, 250, 252, 0.8);
    border-color: rgba(0, 0, 0, 0.06);
}

.light-mode .sp-overview-card {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.06), rgba(59, 130, 246, 0.04));
    border-color: rgba(139, 92, 246, 0.15);
}

.light-mode .sp-banner-create {
    background: rgba(139, 92, 246, 0.04);
    border-color: rgba(139, 92, 246, 0.2);
}

.light-mode .sp-banner-active {
    background: rgba(139, 92, 246, 0.04);
    border-color: rgba(139, 92, 246, 0.15);
}


@media (max-width: 480px) {
    .sp-page-title { font-size: 18px; }
    .sp-regen-btn { font-size: 11px; padding: 6px 10px; }
    .sp-task-card { padding: 12px; }
    .sp-task-title { font-size: 13px; }
    .sp-week-nav { flex-wrap: wrap; gap: 6px; }
}

/* ── History Button ── */
.sp-header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.sp-history-btn {
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: #c4b5fd;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.sp-history-btn:hover {
    background: rgba(139, 92, 246, 0.25);
    border-color: rgba(139, 92, 246, 0.5);
    color: #e9d5ff;
}

/* ── History Overlay ── */
.sp-history-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: spHistFadeIn 0.2s ease;
}
.sp-history-overlay.hidden { display: none; }

@keyframes spHistFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.sp-history-modal {
    background: var(--bg-secondary, #1a1a2e);
    border-radius: 20px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    width: 100%;
    max-width: 640px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
}

.sp-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sp-history-title {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0;
}

.sp-history-close {
    background: rgba(255, 255, 255, 0.06);
    border: none;
    color: #94a3b8;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.sp-history-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.sp-history-list {
    overflow-y: auto;
    padding: 16px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ── History Item ── */
.sp-history-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: 16px;
    transition: all 0.2s;
}
.sp-history-item:hover {
    background: rgba(139, 92, 246, 0.06);
    border-color: rgba(139, 92, 246, 0.2);
}

.sp-history-item-header {
    margin-bottom: 10px;
}

.sp-history-item-title {
    font-size: 15px;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 6px;
}

.sp-history-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 12px;
    color: #64748b;
}

.sp-history-item-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.sp-history-bar-track {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 99px;
    overflow: hidden;
}

.sp-history-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #8b5cf6, #a78bfa);
    border-radius: 99px;
    transition: width 0.3s ease;
}

.sp-history-pct {
    font-size: 12px;
    color: #94a3b8;
    font-weight: 600;
    white-space: nowrap;
}

.sp-history-item-actions {
    display: flex;
    gap: 8px;
}

.sp-history-btn {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.sp-history-restore {
    background: rgba(16, 185, 129, 0.12);
    color: #6ee7b7;
    border-color: rgba(16, 185, 129, 0.3);
}
.sp-history-restore:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.5);
}

.sp-history-delete {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.2);
}
.sp-history-delete:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.4);
}

/* ── Empty History ── */
.sp-history-empty {
    text-align: center;
    padding: 40px 20px;
}

.sp-history-empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.sp-history-empty p {
    color: #94a3b8;
    font-size: 14px;
    margin: 4px 0;
}

.sp-history-empty-hint {
    color: #64748b !important;
    font-size: 13px !important;
}


/* ── Inline Delete Confirm ── */
.sp-delete-confirm {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 12px;
    padding: 10px 14px;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.25);
    border-radius: 10px;
    animation: spConfirmSlide 0.2s ease;
}

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

.sp-delete-confirm span {
    font-size: 13px;
    color: #fca5a5;
    font-weight: 500;
}

.sp-delete-confirm-btns {
    display: flex;
    gap: 8px;
}

.sp-delete-yes {
    padding: 5px 14px;
    border-radius: 7px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    background: #ef4444;
    color: #fff;
    transition: all 0.15s;
}
.sp-delete-yes:hover {
    background: #dc2626;
}

.sp-delete-no {
    padding: 5px 14px;
    border-radius: 7px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #94a3b8;
    transition: all 0.15s;
}
.sp-delete-no:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
}

.sp-history-item-confirming {
    border-color: rgba(239, 68, 68, 0.3);
}