/* Easy Padhai — Full-Screen Camera Scan & Solve */
.ai-fs-scanner {
    position: fixed;
    inset: 0;
    z-index: 999999;
    background: #000;
    color: #fff;
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    box-sizing: border-box;
    overflow: hidden;
}

.ai-fs-scanner[hidden] {
    display: none !important;
}

.ai-fs-scanner *,
.ai-fs-scanner *::before,
.ai-fs-scanner *::after {
    box-sizing: border-box;
}

body.ai-fs-scanner-open {
    overflow: hidden !important;
}

.ai-fs-scanner__screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: #0a0a0f;
}

.ai-fs-scanner__screen[hidden] {
    display: none !important;
}

/* Camera view */
.ai-fs-scanner__video-wrap {
    position: relative;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    background: #000;
}

.ai-fs-scanner__video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform-origin: center center;
    touch-action: none;
}

.ai-fs-scanner__grid {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px) 0 0 / 33.33% 33.33%,
        linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px) 0 0 / 33.33% 33.33%;
    opacity: 0.35;
}

.ai-fs-scanner__grid.is-off {
    display: none;
}

.ai-fs-scanner__doc-frame {
    position: absolute;
    inset: 8% 6%;
    border: 2px dashed rgba(245, 130, 32, 0.85);
    border-radius: 8px;
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.25);
}

.ai-fs-scanner__doc-frame::before,
.ai-fs-scanner__doc-frame::after {
    content: "";
    position: absolute;
    width: 24px;
    height: 24px;
    border: 3px solid #F58220;
}

.ai-fs-scanner__doc-frame::before {
    top: -2px;
    left: -2px;
    border-right: 0;
    border-bottom: 0;
}

.ai-fs-scanner__doc-frame::after {
    bottom: -2px;
    right: -2px;
    border-left: 0;
    border-top: 0;
}

.ai-fs-scanner__top-bar,
.ai-fs-scanner__bottom-bar {
    position: absolute;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: max(12px, env(safe-area-inset-top)) 16px 12px;
    background: linear-gradient(to bottom, rgba(0,0,0,.65), transparent);
    z-index: 5;
}

.ai-fs-scanner__bottom-bar {
    top: auto;
    bottom: 0;
    padding: 12px 16px max(20px, env(safe-area-inset-bottom));
    background: linear-gradient(to top, rgba(0,0,0,.75), transparent);
    justify-content: center;
    gap: 28px;
}

.ai-fs-scanner__top-left,
.ai-fs-scanner__top-right {
    display: flex;
    gap: 10px;
    align-items: center;
}

.ai-fs-scanner__title {
    font-size: 15px;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 1px 4px rgba(0,0,0,.5);
}

.ai-fs-scanner__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    min-height: 48px;
    padding: 10px 14px;
    border: 0;
    border-radius: 999px;
    background: rgba(255,255,255,.18);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.ai-fs-scanner__btn:active {
    transform: scale(0.96);
}

.ai-fs-scanner__btn.is-active {
    background: #F58220;
    color: #fff;
}

.ai-fs-scanner__btn--large {
    min-width: 56px;
    min-height: 56px;
    font-size: 22px;
}

.ai-fs-scanner__capture {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    border: 4px solid #fff;
    background: radial-gradient(circle at 30% 30%, #fff, #e0e0e0);
    box-shadow: 0 0 0 4px rgba(255,255,255,.25), 0 4px 20px rgba(0,0,0,.4);
    cursor: pointer;
    flex-shrink: 0;
}

.ai-fs-scanner__capture:active {
    transform: scale(0.94);
}

/* Preview */
.ai-fs-scanner__preview-img {
    flex: 1;
    min-height: 0;
    width: 100%;
    object-fit: contain;
    background: #111;
}

.ai-fs-scanner__toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(0,0,0,.85);
    justify-content: center;
}

.ai-fs-scanner__toolbar .ai-fs-scanner__btn {
    flex: 1 1 calc(20% - 8px);
    min-width: 72px;
    font-size: 12px;
    border-radius: 12px;
}

.ai-fs-scanner__scroll-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 12px;
    background: #f5f7fb;
    color: #182033;
}

/* Capture preview — Retake / Crop / Import */
.ai-fs-scanner__capture-actions {
    display: flex;
    gap: 10px;
    padding: 14px 12px;
    padding-bottom: max(14px, env(safe-area-inset-bottom));
    background: rgba(0, 0, 0, 0.88);
    justify-content: center;
}

.ai-fs-scanner__capture-actions--overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 10px;
    background: linear-gradient(to top, rgba(0,0,0,.85), transparent);
}

.ai-fs-scanner__capture-btn {
    flex: 1;
    min-height: 52px;
    border: 0;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.95);
    color: #1B4F9C;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
}

.ai-fs-scanner__capture-btn:nth-child(2) {
    background: linear-gradient(135deg, #1B4F9C, #F58220);
    color: #fff;
}

.ai-fs-scanner__preview-wrap {
    position: relative;
    margin-bottom: 12px;
    border-radius: 12px;
    overflow: hidden;
    background: #111;
    max-height: 38vh;
}

.ai-fs-scanner__screen[data-ai-fs-step="preview"] {
    flex-direction: column;
}

.ai-fs-scanner__screen[data-ai-fs-step="preview"] .ai-fs-scanner__preview-img {
    flex: 1;
    min-height: 0;
}


.ai-fs-scanner__preview-wrap img {
    width: 100%;
    max-height: 38vh;
    object-fit: contain;
    display: block;
}

.ai-fs-scanner__smart-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.ai-fs-scanner__chip {
    flex: 1 1 calc(33% - 8px);
    min-width: 100px;
    padding: 10px 8px;
    border: 2px solid #1B4F9C;
    border-radius: 12px;
    background: #fff;
    color: #1B4F9C;
    font-size: 12px;
    font-weight: 800;
    text-align: center;
    cursor: pointer;
}

.ai-fs-scanner__chip:nth-child(3n+2) { border-color: #F58220; color: #c45a00; }
.ai-fs-scanner__chip:nth-child(3n) { border-color: #2e7d32; color: #2e7d32; }

.ai-fs-scanner__input-wrap {
    position: relative;
    margin-bottom: 12px;
}

.ai-fs-scanner__input-wrap label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 800;
    color: #1B4F9C;
}

.ai-fs-scanner__question {
    width: 100%;
    min-height: 100px;
    padding: 14px 118px 14px 14px;
    border: 2px solid #1B4F9C;
    border-radius: 14px;
    font-size: 16px;
    line-height: 1.45;
    resize: vertical;
    background: #fff;
    color: #182033;
}

.ai-fs-scanner__mic.ai-study-voice-btn {
    position: absolute;
    right: 10px;
    bottom: 10px;
    width: auto;
    min-width: 44px;
    min-height: 44px;
    height: auto;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 800;
    box-shadow: 0 2px 10px rgba(27, 79, 156, 0.35);
    --voice-btn-bg: #312E81;
    --voice-btn-border: #A5B4FC;
    --voice-btn-text: #E0E7FF;
    --voice-btn-icon: #C7D2FE;
}

.ai-fs-scanner__mic.ai-study-voice-btn .ai-study-voice-btn__icon {
    color: inherit;
}

.ai-fs-scanner__mic.ai-study-voice-btn.is-listening {
    animation: ai-fs-pulse 1s infinite;
    background: #c62828 !important;
    border-color: #ef9a9a !important;
    color: #fff !important;
}

/* Legacy fallback if old emoji mic markup remains */
.ai-fs-scanner__mic:not(.ai-study-voice-btn) {
    position: absolute;
    right: 10px;
    bottom: 10px;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, #1B4F9C, #F58220);
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(27, 79, 156, 0.35);
}

.ai-fs-scanner__mic:not(.ai-study-voice-btn).is-listening {
    animation: ai-fs-pulse 1s infinite;
    background: #c62828;
}

@keyframes ai-fs-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(198, 40, 40, 0.5); }
    50% { box-shadow: 0 0 0 12px rgba(198, 40, 40, 0); }
}

.ai-fs-scanner__voice-status {
    margin-bottom: 10px;
    padding: 8px 12px;
    border-radius: 10px;
    background: #e3f2fd;
    color: #0d47a1;
    font-size: 13px;
    font-weight: 700;
}

.ai-fs-scanner__voice-status.is-error {
    background: #ffebee;
    color: #b71c1c;
}

.ai-fs-scanner__voice-status.is-success {
    background: #e8f5e9;
    color: #1b5e20;
}

.ai-fs-scanner__ocr-box label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 800;
    color: #2e7d32;
}

.ai-fs-scanner__ocr-text {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 2px solid #2e7d32;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    background: #fff;
    color: #182033;
}

.ai-fs-scanner__footer {
    display: flex;
    gap: 10px;
    padding: 12px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    background: #fff;
    border-top: 1px solid #dce4ec;
}

.ai-fs-scanner__footer .ai-fs-scanner__btn {
    flex: 1;
    min-height: 52px;
    border-radius: 14px;
    font-size: 15px;
}

.ai-fs-scanner__footer .ai-fs-scanner__btn--primary {
    background: linear-gradient(135deg, #1B4F9C, #F58220);
    color: #fff;
}

.ai-fs-scanner__footer .ai-fs-scanner__btn--secondary {
    background: #eef2f7;
    color: #1B4F9C;
}

.ai-fs-scanner__progress {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    padding: 20px 28px;
    border-radius: 16px;
    background: rgba(0,0,0,.82);
    text-align: center;
    min-width: 200px;
}

.ai-fs-scanner__progress[hidden] {
    display: none !important;
}

.ai-fs-scanner__progress-bar {
    height: 6px;
    margin-top: 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.2);
    overflow: hidden;
}

.ai-fs-scanner__progress-bar span {
    display: block;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #1B4F9C, #F58220);
    transition: width 0.3s ease;
}

.ai-fs-scanner__permission {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(0,0,0,.88);
    text-align: center;
}

.ai-fs-scanner__permission[hidden] {
    display: none !important;
}

.ai-fs-scanner__permission p {
    margin: 0 0 16px;
    font-size: 16px;
    line-height: 1.5;
    max-width: 320px;
}

/* Result + follow-up */
.ai-fs-scanner__result {
    padding: 14px;
    border-radius: 14px;
    background: #fff;
    border: 2px solid #2e7d32;
    margin-bottom: 12px;
    color: #182033;
    max-height: 45vh;
    overflow-y: auto;
}

.ai-fs-scanner__result .ai-study-output-block {
    color: #182033;
}

.ai-fs-scanner__tts-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.ai-fs-scanner__tts-bar .ai-fs-scanner__btn {
    flex: 1 1 auto;
    min-height: 44px;
    border-radius: 12px;
    background: #e8f5e9;
    color: #1b5e20;
    font-size: 13px;
}

.ai-fs-scanner__followup {
    margin-top: 8px;
}

@media (orientation: landscape) {
    .ai-fs-scanner__preview-wrap,
    .ai-fs-scanner__preview-wrap img {
        max-height: 55vh;
    }
}

@media (min-width: 768px) {
    .ai-fs-scanner__scroll-body {
        max-width: 720px;
        margin: 0 auto;
        width: 100%;
    }

    .ai-fs-scanner__chip {
        flex: 1 1 calc(25% - 8px);
    }
}