/* Xikho — extends shared webapp.css (same look as app.php) */

.hidden { display: none !important; }

/* Screens with bottom nav need padding */
.xikho-screen {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding-bottom: 72px;
}

/* Onboarding (splash-style like app.php) */
.xikho-onboarding {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-align: center;
}

.xikho-onboarding-inner {
    width: 100%;
    max-width: 400px;
}

.xikho-brand-logo {
    width: 108px;
    height: 108px;
    object-fit: contain;
    border-radius: 24px;
    margin: 0 auto 14px;
    display: block;
    background: rgba(255, 255, 255, 0.96);
    padding: 10px;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.28), 0 14px 34px rgba(255, 159, 67, 0.42);
}

.xikho-onboarding h1 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 6px;
}

.xikho-onboarding .tagline {
    opacity: 0.92;
    margin-bottom: 22px;
    font-size: 15px;
}

.xikho-onboarding-card {
    background: white;
    color: var(--text);
    border-radius: 20px;
    padding: 22px 20px;
    text-align: left;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.xikho-onboarding-card h2 {
    color: var(--primary);
    font-size: 18px;
    margin-bottom: 6px;
}

.xikho-onboarding-card .sub {
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.4;
}

.xikho-start-btn {
    width: 100%;
    margin-top: 8px;
}

.xikho-hint {
    margin-top: 12px;
    font-size: 11px;
    color: var(--muted);
    line-height: 1.4;
    text-align: center;
}

.xikho-label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--muted);
    margin: 10px 0 6px;
}

.xikho-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ddd;
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}

.xikho-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(123, 31, 162, 0.2);
}

.xikho-district-line {
    font-size: 12px;
    color: var(--muted);
    font-weight: 600;
    margin: -8px 0 12px;
    padding: 0 2px;
}

.xikho-section-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin: 16px 0 10px;
}

.xikho-subject-hint {
    font-size: 13px;
    color: var(--muted);
    margin: -4px 0 10px;
    line-height: 1.4;
}

.xikho-subject-hint.picked {
    color: var(--primary);
    font-weight: 700;
}

.xikho-subject-empty {
    background: white;
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    color: var(--muted);
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* Header with back button */
.xikho-header-back {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 8px;
}

.xikho-back-btn {
    border: none;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    font-size: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.xikho-header-titles {
    min-width: 0;
    text-align: center;
}

.xikho-header-title {
    font-weight: 800;
    font-size: 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.xikho-header-sub {
    font-size: 11px;
    opacity: 0.85;
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.xikho-header-spacer {
    visibility: hidden;
    min-width: 40px;
}

/* Subject cards use .webapp-card from JS */
.webapp-card.subject-picked {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Chapter list */
.xikho-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.xikho-chapter-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    border: none;
    width: 100%;
    text-align: left;
    font-family: inherit;
    transition: transform 0.15s;
}

.xikho-chapter-row:active {
    transform: scale(0.98);
}

.xikho-chapter-idx {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(123, 31, 162, 0.1);
    color: var(--primary);
    font-weight: 800;
    flex-shrink: 0;
}

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

.xikho-chapter-name {
    font-weight: 800;
    font-size: 15px;
    color: var(--text);
}

.xikho-chapter-tick {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(46, 204, 113, 0.15);
    color: #27ae60;
    font-weight: 800;
    flex-shrink: 0;
}

.xikho-chapter-row-wrap {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.xikho-chapter-row-wrap .xikho-chapter-row {
    flex: 1;
    min-width: 0;
}

.xikho-chapter-quiz-btn {
    flex-shrink: 0;
    width: 54px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent), #e040fb);
    color: white;
    font-weight: 800;
    font-size: 13px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(255, 159, 67, 0.35);
    font-family: inherit;
}

.xikho-chapter-quiz-btn:active {
    transform: scale(0.97);
}

.xikho-chapter-ppt-btn {
    flex-shrink: 0;
    width: 54px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, #5c6bc0, #3949ab);
    color: white;
    font-weight: 800;
    font-size: 13px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(57, 73, 171, 0.35);
    font-family: inherit;
}

.xikho-chapter-ppt-btn:active {
    transform: scale(0.97);
}

.xikho-quiz-pick-row.is-disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.xikho-ppt-main {
    padding-bottom: 24px;
}

.xikho-ppt-viewer-wrap {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    min-height: 60vh;
}

.xikho-ppt-frame {
    width: 100%;
    height: 70vh;
    border: none;
    display: block;
}

.xikho-ppt-frame.hidden {
    display: none;
}

/* PDF slide presentation (PDF.js) */
.xikho-pdf-viewer {
    display: flex;
    flex-direction: column;
    min-height: 60vh;
    background: #2a2038;
}

.xikho-pdf-viewer.hidden {
    display: none;
}

.xikho-pdf-canvas-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: 12px;
    min-height: 52vh;
}

#pdf-slide-canvas {
    max-width: 100%;
    height: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
    border-radius: 4px;
    background: #fff;
}

.xikho-pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 12px 16px 16px;
    background: rgba(0, 0, 0, 0.25);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.xikho-pdf-nav {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #7b1fa2, #9c27b0);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(123, 31, 162, 0.45);
}

.xikho-pdf-nav:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.xikho-pdf-page-label {
    font-weight: 700;
    font-size: 15px;
    color: #f5f6fa;
    min-width: 72px;
    text-align: center;
}

.xikho-pptx-host {
    width: 100%;
    min-height: 55vh;
    max-height: 72vh;
    overflow: auto;
    background: #fff;
    padding: 8px;
    box-sizing: border-box;
}

.xikho-pptx-host canvas,
.xikho-pptx-host img {
    max-width: 100%;
    height: auto;
}

.xikho-ppt-loading {
    text-align: center;
    padding: 20px 12px;
    font-weight: 600;
    color: #555;
    margin: 0;
}

.xikho-ppt-download-text {
    margin-bottom: 14px;
    font-weight: 600;
    line-height: 1.5;
}

.xikho-quiz-pick-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    border: none;
    width: 100%;
    text-align: left;
    font-family: inherit;
    transition: transform 0.15s;
}

.xikho-quiz-pick-row:active {
    transform: scale(0.98);
}

.xikho-quiz-pick-row .xikho-chapter-info {
    flex: 1;
}

.xikho-quiz-pick-meta {
    font-size: 12px;
    color: var(--muted);
    font-weight: 600;
    margin-top: 4px;
}

.xikho-quiz-pick-go {
    flex-shrink: 0;
    padding: 8px 12px;
    border-radius: 20px;
    background: var(--primary);
    color: white;
    font-size: 12px;
    font-weight: 700;
}

/* Lesson */
.xikho-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.xikho-btn-inline {
    flex: 1;
    min-width: 120px;
    padding: 12px 16px;
    font-size: 14px;
}

.xikho-btn-secondary {
    background: white !important;
    color: var(--primary) !important;
    border: 2px solid var(--primary) !important;
}

.xikho-lesson-sections {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.xikho-lesson-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.xikho-lesson-head {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px;
    border: none;
    background: white;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
}

.xikho-lesson-icon {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: rgba(123, 31, 162, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.xikho-lesson-title {
    flex: 1;
    font-weight: 800;
    font-size: 15px;
    color: var(--primary);
}

.xikho-speak-btn {
    border: none;
    background: rgba(255, 159, 67, 0.2);
    color: #c56a00;
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 12px;
    cursor: pointer;
    flex-shrink: 0;
}

.xikho-lesson-chevron {
    color: var(--primary);
    font-weight: 800;
    transition: transform 0.2s;
}

.xikho-lesson-card.is-open .xikho-lesson-chevron {
    transform: rotate(180deg);
}

.xikho-lesson-body {
    display: none;
    padding: 0 14px 14px;
    border-top: 1px solid #eee;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
}

.xikho-lesson-card.is-open .xikho-lesson-body {
    display: block;
}

/* Quiz */
.xikho-progress-track {
    height: 8px;
    background: rgba(123, 31, 162, 0.12);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 14px;
}

.xikho-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    transition: width 0.25s ease;
}

.xikho-quiz-question {
    font-weight: 800;
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 4px;
}

.xikho-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}

.xikho-opt-btn {
    padding: 14px;
    border-radius: 14px;
    border: 2px solid #e8e8e8;
    background: white;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.xikho-opt-btn:active {
    transform: scale(0.99);
}

.xikho-opt-btn.correct {
    background: rgba(46, 204, 113, 0.15);
    border-color: #2ecc71;
    color: #1e6b3a;
}

.xikho-opt-btn.wrong {
    background: rgba(231, 76, 60, 0.12);
    border-color: #e74c3c;
    color: #922b21;
}

.xikho-opt-btn:disabled {
    cursor: not-allowed;
}

.xikho-explain {
    margin-top: 12px;
    padding: 12px;
    background: rgba(123, 31, 162, 0.08);
    border-radius: 12px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.5;
    font-size: 14px;
}

.xikho-quiz-next {
    width: 100%;
    margin-top: 14px;
}

.xikho-finish {
    margin-top: 14px;
    text-align: center;
    font-weight: 700;
}

.xikho-card-heading {
    font-size: 16px;
    color: var(--primary);
    margin-bottom: 10px;
}

.xikho-summary {
    font-weight: 700;
    line-height: 1.6;
    color: var(--text);
}

/* Bottom nav */
.xikho-bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 500;
    display: flex;
    gap: 6px;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    background: white;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
}

.xikho-nav-btn {
    flex: 1;
    border: none;
    background: transparent;
    border-radius: 12px;
    padding: 8px 4px;
    cursor: pointer;
    color: var(--muted);
    font-weight: 700;
    font-size: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-family: inherit;
}

.xikho-nav-btn span {
    font-size: 10px;
}

.xikho-nav-btn.active {
    background: rgba(123, 31, 162, 0.12);
    color: var(--primary);
}

/* Spinner */
.xikho-spinner-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.xikho-spinner-card {
    background: white;
    border-radius: 16px;
    padding: 18px 22px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    text-align: center;
}

.xikho-spinner {
    width: 36px;
    height: 36px;
    border: 4px solid rgba(123, 31, 162, 0.15);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: xikho-spin 0.9s linear infinite;
    margin: 0 auto 10px;
}

.xikho-spinner-text {
    font-weight: 700;
    color: var(--primary);
    font-size: 13px;
}

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

/* App modal (phone / alerts) — dark theme */
#webapp-modal {
    z-index: 1100;
}

#webapp-modal .xikho-app-modal {
    background: linear-gradient(160deg, #1e1530 0%, #120c1c 100%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
    color: var(--text-light, #f5f6fa);
    max-width: 360px;
}

#webapp-modal .xikho-app-modal h3 {
    color: #e040fb;
    font-size: 18px;
    margin-bottom: 10px;
}

#webapp-modal .xikho-app-modal p {
    color: #c5c8e0;
    line-height: 1.55;
    margin-bottom: 16px;
}

#webapp-modal .xikho-app-modal input {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #fff;
    border-radius: 12px;
    font-size: 18px;
    letter-spacing: 0.05em;
}

#webapp-modal .xikho-app-modal input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

#webapp-modal .xikho-app-modal input:focus {
    outline: none;
    border-color: #e040fb;
    box-shadow: 0 0 0 3px rgba(224, 64, 251, 0.25);
}

#webapp-modal .webapp-modal-primary {
    background: linear-gradient(135deg, #7b1fa2, #9c27b0);
    color: #fff;
}

#webapp-modal .webapp-modal-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #e0e0e0;
}

#webapp-modal .webapp-modal-primary.xikho-modal-danger {
    background: linear-gradient(135deg, #c62828, #e53935);
    box-shadow: 0 4px 14px rgba(198, 40, 40, 0.45);
}

#webapp-modal .webapp-modal-actions {
    gap: 10px;
}

#webapp-modal .webapp-modal-actions button {
    flex: 1;
    min-height: 46px;
    font-size: 15px;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    border: none;
}

/* Chat modal */
.webapp-modal-overlay.show {
    display: flex;
}

#chat-modal.show {
    display: flex;
}

.xikho-chat-modal {
    max-width: 420px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}

.xikho-chat-messages {
    max-height: 40vh;
    overflow-y: auto;
    margin: 12px 0;
    padding: 10px;
    background: var(--bg);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.xikho-chat-bubble {
    padding: 10px 12px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    max-width: 92%;
}

.xikho-chat-bubble.ai {
    background: rgba(123, 31, 162, 0.1);
    color: var(--primary);
    align-self: flex-start;
}

.xikho-chat-bubble.user {
    background: rgba(255, 159, 67, 0.2);
    color: #8a4b00;
    align-self: flex-end;
}

.xikho-chat-input {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.xikho-chat-input .xikho-input {
    flex: 1;
    margin: 0;
}

.xikho-chat-send {
    flex-shrink: 0;
    padding: 12px 16px;
    white-space: nowrap;
}

/* Google login + admin messages */
.xikho-google-wrap {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    min-height: 44px;
}

.xikho-messages-screen {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
}

.xikho-messages-screen .webapp-header {
    flex-shrink: 0;
}

.xikho-admin-msg-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: #e8e0f0;
}

.xikho-msg-placeholder {
    color: #7f8c8d;
    text-align: center;
    font-size: 14px;
}

.xikho-msg-bubble {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 14px;
    max-width: 85%;
    word-wrap: break-word;
    line-height: 1.45;
}

.xikho-msg-bubble.admin {
    background: #fff;
    align-self: flex-start;
    border-top-left-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

.xikho-msg-bubble.student {
    background: #dcf8c6;
    align-self: flex-end;
    border-top-right-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

.xikho-msg-meta {
    font-size: 11px;
    color: #7f8c8d;
    margin-top: 4px;
}

.xikho-chat-input-bar {
    flex-shrink: 0;
    background: #fff;
    padding: 8px 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-top: 1px solid #e0e0e0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
}

.xikho-chat-text-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 20px;
    font-size: 14px;
    outline: none;
    font-family: inherit;
}

.xikho-chat-send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--primary, #7b1fa2);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    flex-shrink: 0;
}