/* =========================================
   ISYARATKU - PRAKTIK GESTURE
   COMPLETE CSS + LIGHTING + PERFORMANCE
   ========================================= */

/* =========================================
   1. GLOBAL
   ========================================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: var(--color-navy);
    --gray: var(--color-muted);
    --light: var(--color-bg);
    --white: var(--color-surface);
    --border: var(--color-border);
    --camera-bg: var(--color-mint);
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--font-sans);
    background: var(--light);
    color: var(--black);
    line-height: 1.5;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =========================================
   2. HEADER
   ========================================= */

.practice-header {
    height: 72px;
    padding: 0 5.5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    border-bottom: 1px solid var(--border);
}

.practice-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--black);
    font-size: 15px;
    font-weight: 700;
}

.brand-icon {
    width: 31px;
    height: 31px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: 9px;
    font-size: 12px;
    font-weight: 700;
}

.practice-nav {
    display: flex;
    align-items: center;
    gap: 7px;
}

.practice-nav a {
    padding: 9px 15px;
    border-radius: 25px;
    text-decoration: none;
    color: var(--color-navy);
    font-size: 14px;
    transition: 0.2s ease;
    font-weight: 600;
}

.practice-nav a:hover {
    background: var(--color-mint);
    color: var(--color-navy);
}

.practice-nav a.active {
    background: var(--color-primary);
    color: var(--color-surface);
}

/* =========================================
   3. MAIN
   ========================================= */

.practice-main {
    width: 100%;
    max-width: 1500px;
    margin: 0 auto;
    padding: 55px 5.5% 75px;
    flex: 1;
}

/* =========================================
   4. INTRO
   ========================================= */

.practice-intro {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 32px;
}

.intro-copy {
    max-width: 750px;
}

.intro-copy h1 {
    font-size: clamp(34px, 3.5vw, 49px);
    line-height: 1.1;
    letter-spacing: -1.8px;
    font-weight: 800;
}

.intro-copy p {
    max-width: 730px;
    margin-top: 13px;
    color: var(--gray);
    font-size: 15px;
    line-height: 1.8;
}

.privacy-notice {
    max-width: 290px;
    min-width: 230px;
    padding: 14px 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    border: 1px solid transparent;
    border-radius: 13px;
    background: var(--color-mint);
}

.privacy-notice span {
    font-size: 20px;
    color: var(--color-primary);
}

.privacy-notice p {
    color: var(--color-navy);
    font-size: 13px;
    line-height: 1.6;
}

/* =========================================
   5. WORKSPACE
   ========================================= */

.practice-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(290px, 1fr);
    gap: 25px;
    align-items: start;
}

/* =========================================
   6. CAMERA
   ========================================= */

.camera-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: var(--camera-bg);
    border: 1px solid var(--color-border);
    border-radius: 22px;
    overflow: hidden;
}

.camera-container::after {
    content: "";
    position: absolute;
    inset: 13px;
    border: 2px dashed rgba(8, 127, 140, 0.35);
    border-radius: 16px;
    pointer-events: none;
    z-index: 2;
}

#webcam,
#overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

#webcam {
    object-fit: contain;
    background: transparent;
    transform: scaleX(-1);
    z-index: 0;
}

#overlay {
    object-fit: contain;
    pointer-events: none;
    transform: scaleX(-1);
    z-index: 1;
}

/* =========================================
   7. CAMERA PLACEHOLDER
   ========================================= */

.camera-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 25px;
    pointer-events: none;
    z-index: 1;
}

.hand-guide {
    width: 165px;
    height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-border-strong);
    border-radius: 48%;
    color: var(--color-primary);
}

.hand-guide svg {
    width: 120px;
    height: 145px;
}

.camera-placeholder p {
    color: var(--color-navy);
    font-size: 14px;
    font-weight: 600;
}

.camera-status,
.ai-status {
    position: absolute;
    top: 22px;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 28px;
    padding: 6px 11px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.camera-status {
    left: 22px;
    background: white;
    color: var(--color-navy);
    box-shadow: 0 1px 3px rgba(23, 49, 58, 0.15);
}

.ai-status {
    right: 22px;
    background: var(--black);
    color: white;
}

/* Status sistem belum diketahui: badge tidak ditampilkan */
.ai-status[hidden] {
    display: none;
}

.ai-status.is-ready {
    background: var(--color-success);
}

.ai-status.is-error {
    background: var(--color-danger);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-border-strong);
}

/* =========================================
   8. CAMERA CONTROLS
   ========================================= */

.camera-controls {
    margin-top: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

.control-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button {
    min-height: 46px;
    padding: 0 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: 0.2s ease;
}

.primary-button {
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: white;
}

.primary-button:hover {
    background: var(--color-primary-strong);
    border-color: var(--color-primary-strong);
}

.secondary-button {
    border: 1px solid var(--color-border-strong);
    background: white;
    color: var(--color-navy);
}

.secondary-button:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-strong);
}

/* =========================================
   9. LIGHTING STATUS
   ========================================= */

.lighting-status {
    display: block;
    min-height: 18px;
    margin-top: 12px;
    padding: 12px 15px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--color-navy);
    background: var(--color-surface-muted);
}

.lighting-status:empty {
    display: none;
}

.lighting-status[data-status="normal"] {
    color: var(--color-success);
    background: var(--color-success-bg);
}

.lighting-status[data-status="gelap"] {
    color: var(--color-warning);
    background: var(--color-warning-bg);
}

.lighting-status[data-status="terang"] {
    color: var(--color-warning);
    background: var(--color-warning-bg);
}

/* =========================================
   10. CAMERA ERROR
   ========================================= */

.camera-error {
    margin-top: 10px;
    padding: 12px 15px;
    background: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    border-radius: 10px;
    color: var(--color-danger);
    font-size: 13px;
    line-height: 1.6;
    font-weight: 600;
}

.camera-error[hidden] {
    display: none;
}

/* =========================================
   11. PERFORMANCE MONITORING
   ========================================= */

.performance-panel {
    width: 100%;
    margin-top: 16px;
    padding: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    box-shadow: none;
}

.performance-panel summary {
    cursor: pointer;
    color: var(--color-navy);
    font-size: 15px;
    font-weight: 700;
}

.performance-panel[open] summary {
    margin-bottom: 16px;
}

/* summary tidak tercakup aturan fokus di theme.css */
.performance-panel summary:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
    border-radius: 4px;
}

.performance-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.performance-empty {
    display: none;
    color: var(--color-muted);
    font-size: 13px;
}

/* Kamera belum aktif: satu pesan, bukan empat kotak berisi "—".
   Browser tanpa :has() tetap menampilkan kotak seperti sebelumnya. */
.camera-section:not(:has(.camera-active)) .performance-grid {
    display: none;
}

.camera-section:not(:has(.camera-active)) .performance-empty {
    display: block;
}

.performance-item {
    min-width: 0;
    padding: 15px 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.performance-item span {
    display: block;
    margin-bottom: 8px;
    color: var(--color-muted);
    font-size: 12px;
    line-height: 1.4;
}

.performance-item strong {
    display: block;
    color: var(--color-navy);
    font-size: 16px;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.performance-note {
    margin-top: 13px;
    padding-left: 18px;
    color: var(--color-muted);
    font-size: 12px;
    line-height: 1.6;
}

/* =========================================
   12. RIGHT PANEL
   ========================================= */

.result-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-card {
    padding: 22px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: var(--shadow-card);
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.result-header h2 {
    font-size: 18px;
    font-weight: 800;
}

/* =========================================
   13. PREDICTION DISPLAY
   ========================================= */

.prediction-display {
    margin-top: 20px;
    padding: 18px;
    min-height: 125px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-radius: 20px;
    background: var(--black);
    color: white;
}

.prediction-letter {
    width: 83px;
    height: 83px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    background: white;
    color: var(--color-primary);
    font-size: 56px;
    font-weight: 800;
}

.prediction-details {
    flex: 1;
    min-width: 0;
}

.prediction-details[hidden] {
    display: none;
}

.prediction-details strong {
    display: block;
    font-size: 14px;
    line-height: 1.4;
}

.prediction-details > span {
    display: block;
    margin-top: 8px;
    color: var(--color-on-dark-muted);
    font-size: 12px;
}

.confidence-track {
    width: 100%;
    height: 6px;
    margin-top: 10px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 20px;
    overflow: hidden;
}

.confidence-fill {
    width: 0%;
    height: 100%;
    background: var(--color-accent);
    border-radius: 20px;
    transition: width 0.25s ease;
}

.prediction-message {
    margin-top: 18px;
    color: var(--color-navy);
    font-size: 13px;
    line-height: 1.7;
}

.selected-letter-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    color: var(--color-muted);
    font-size: 13px;
}

.selected-letter-info strong {
    padding: 5px 10px;
    background: var(--color-mint);
    border-radius: 15px;
    color: var(--color-primary-strong);
}

/* =========================================
   14. RESULT ACTIONS
   ========================================= */

.result-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    flex-wrap: wrap;
}

/* Switch suara (TTS) ON/OFF */
.sound-switch {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 0 16px 0 10px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: 24px;
    color: var(--color-navy);
    font-size: 13px;
    font-weight: 600;
    transition:
        border-color 0.2s ease,
        background-color 0.2s ease,
        color 0.2s ease;
}

.sound-switch:hover:not(:disabled) {
    border-color: var(--color-primary);
}

.sound-switch-track {
    position: relative;
    flex: none;
    width: 40px;
    height: 22px;
    background: var(--color-border-strong);
    border-radius: 11px;
    transition: background-color 0.2s ease;
}

.sound-switch-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: var(--color-surface);
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(23, 49, 58, 0.25);
    transition: transform 0.2s ease;
}

.sound-switch[aria-checked="true"] {
    background: var(--color-mint);
    border-color: var(--color-primary);
    color: var(--color-primary-strong);
}

.sound-switch[aria-checked="true"] .sound-switch-track {
    background: var(--color-primary);
}

.sound-switch[aria-checked="true"] .sound-switch-thumb {
    transform: translateX(18px);
}

.sound-hint {
    margin-top: 10px;
    color: var(--color-muted);
    font-size: 12px;
    line-height: 1.6;
}

.sound-hint:empty {
    display: none;
}

.retry-button {
    min-height: 44px;
    padding: 0 10px;
    background: transparent;
    border: none;
    color: var(--color-primary-strong);
    font-size: 13px;
    font-weight: 600;
}

.retry-button:hover {
    text-decoration: underline;
}

/* =========================================
   15. TIPS
   ========================================= */

.tips-card {
    padding: 22px;
    border-radius: 22px;
    background: var(--color-mint);
}

.tips-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 14px;
}

.tips-card ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
    list-style: none;
}

.tips-card li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-navy);
    font-size: 13px;
    line-height: 1.4;
}

.tip-check {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    font-size: 11px;
}

/* =========================================
   16. FOOTER
   ========================================= */

.practice-footer {
    min-height: 125px;
    padding: 25px 5.5%;
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 45px;
    background: var(--black);
    color: white;
}

.footer-about strong {
    font-size: 14px;
}

.footer-about p {
    max-width: 290px;
    margin-top: 7px;
    color: var(--color-on-dark-muted);
    font-size: 13px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.footer-links a {
    color: var(--color-on-dark-muted);
    text-decoration: none;
    font-size: 13px;
}

.footer-links a:hover {
    color: var(--color-surface);
}

.practice-footer > span {
    color: var(--color-on-dark-muted);
    font-size: 12px;
}

/* =========================================
   17. CAMERA INTERACTIVE STATES
   ========================================= */

.camera-container.camera-active .camera-placeholder {
    display: none;
}

.camera-container.camera-active {
    background: var(--color-camera);
}

.camera-container.camera-active #webcam {
    background: var(--color-camera);
}

.camera-status.is-active .status-dot {
    background: var(--color-success);
}

.camera-status.is-pending .status-dot {
    background: var(--color-pending);
}

/* =========================================
   18. MODAL PILIH HURUF
   ========================================= */

.letter-dialog {
    position: fixed;
    inset: 0;
    width: min(520px, calc(100% - 30px));
    max-height: min(80vh, 700px);
    margin: auto;
    padding: 25px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background: white;
    color: var(--color-navy);
    box-shadow: 0 24px 80px rgba(23, 49, 58, 0.25);
    overflow-y: auto;
}

.letter-dialog::backdrop {
    background: rgba(23, 49, 58, 0.55);
}

.dialog-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
}

.dialog-heading h2 {
    font-size: 23px;
    letter-spacing: -0.5px;
}

.dialog-heading p {
    margin-top: 8px;
    font-size: 13px;
    color: var(--color-muted);
}

.dialog-close {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: var(--color-mint);
    font-size: 22px;
    cursor: pointer;
    color: var(--color-navy);
}

.letter-picker-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 9px;
    margin-top: 25px;
}

.letter-option {
    aspect-ratio: 1;
    border: 1px solid var(--color-border);
    border-radius: 11px;
    background: var(--color-bg);
    color: var(--color-navy);
    font-size: 19px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s ease;
}

.letter-option:hover,
.letter-option.is-selected {
    background: var(--color-mint);
    color: var(--color-primary-strong);
    border-color: var(--color-primary);
}

.letter-option.is-selected {
    background: var(--color-primary);
    color: var(--color-surface);
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 25px;
}

.dialog-actions button {
    padding: 11px 17px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    min-height: 44px;
    font-weight: 600;
}

#clearLetterButton {
    border: 1px solid var(--color-border-strong);
    background: white;
    color: var(--color-navy);
}

#doneLetterButton {
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: white;
}

button:focus-visible,
a:focus-visible,
.letter-option:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

/* =========================================
   19. RESPONSIVE TABLET
   ========================================= */

@media (max-width: 1050px) {

    .practice-workspace {
        grid-template-columns: 1fr;
    }

    .result-section {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .practice-footer {
        grid-template-columns: 1fr auto;
    }

    .practice-footer > span {
        grid-column: 1 / -1;
    }
}

/* =========================================
   20. RESPONSIVE MOBILE
   ========================================= */

@media (max-width: 700px) {

    .practice-header {
        height: auto;
        padding: 15px 5%;
        flex-direction: column;
        gap: 15px;
    }

    .practice-nav {
        justify-content: center;
        flex-wrap: wrap;
    }

    .practice-main {
        padding: 35px 5% 50px;
    }

    .practice-intro {
        flex-direction: column;
        align-items: flex-start;
    }

    .intro-copy h1 {
        font-size: 36px;
    }

    .privacy-notice {
        max-width: 100%;
    }

    .result-section {
        display: flex;
    }

    .camera-controls {
        flex-direction: column;
        align-items: flex-start;
    }

    .performance-panel {
        padding: 16px;
    }

    .performance-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .performance-item {
        padding: 13px 11px;
    }

    .performance-item strong {
        font-size: 15px;
    }

    .practice-footer {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .practice-footer > span {
        grid-column: auto;
    }
}

/* =========================================
   21. RESPONSIVE SMALL MOBILE
   ========================================= */

@media (max-width: 450px) {

    .practice-nav a {
        padding: 9px 10px;
        font-size: 12px;
    }

    .intro-copy h1 {
        font-size: 32px;
    }

    .camera-container {
        aspect-ratio: 4 / 5;
    }

    .hand-guide {
        width: 115px;
        height: 140px;
    }

    .hand-guide svg {
        width: 85px;
        height: 105px;
    }

    .camera-placeholder p {
        max-width: 160px;
        text-align: center;
        line-height: 1.5;
    }

    .camera-status,
    .ai-status {
        top: 18px;
        font-size: 9px;
        padding: 6px 8px;
    }

    .camera-status {
        left: 18px;
    }

    .ai-status {
        right: 18px;
    }

    .result-card {
        padding: 17px;
    }

    .result-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .prediction-letter {
        width: 70px;
        height: 70px;
        font-size: 45px;
    }

    .prediction-display {
        padding: 13px;
    }

    .letter-dialog {
        padding: 18px;
    }

    .letter-picker-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
        gap: 7px;
    }

    .letter-option {
        font-size: 16px;
    }

    .selected-letter-info {
        flex-wrap: wrap;
    }
}

/* =========================================
   22. REDUCED MOTION
   ========================================= */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}

/* =========================================
   REVISI UI: HURUF TARGET + BERHASIL
   Tanpa 3D dan tanpa animasi berat agar
   kamera dan inferensi tidak terganggu.
   ========================================= */

.target-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: white;
    box-shadow: var(--shadow-card);
}

.target-card img {
    flex: none;
    width: 76px;
    height: 76px;
    border-radius: 14px;
    background: var(--color-mint);
    object-fit: cover;
}

.target-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.target-copy span {
    color: var(--color-muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.target-copy strong {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.05;
}

.target-copy a {
    color: var(--color-primary-strong);
    font-size: 13px;
    font-weight: 700;
}

.target-card .status-badge {
    margin-left: auto;
    align-self: flex-start;
}

.practice-success {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 6px 12px;
    margin-top: 14px;
    padding: 14px;
    border: 1px solid #A6E0C0;
    border-radius: 16px;
    background: var(--color-success-bg);
    animation: success-in 0.3s ease-out;
}

.practice-success strong {
    display: block;
    color: var(--color-success);
    font-size: 15px;
}

.practice-success div span {
    color: var(--color-navy);
    font-size: 13px;
}

.success-icon {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-success);
    color: white;
    font-weight: 800;
}

.practice-success .btn {
    grid-column: 1 / -1;
    min-height: 42px;
    font-size: 14px;
}

.target-card[hidden],
.practice-success[hidden] {
    display: none;
}

@keyframes success-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}

.site-footer p {
    margin-top: 4px;
}