/* Trang QR — màu bám design system [colors.css]: đỏ primary, vàng secondary, nâu chữ */
.qrcode-page-main {
    --qr-surface: #ffffff;
    --qr-surface-soft: linear-gradient(
        165deg,
        var(--color-background-primary) 0%,
        #ffffff 52%,
        var(--color-background-secondary) 100%
    );
    --qr-border-subtle: rgba(44, 24, 16, 0.1);
    --qr-border-input: rgba(139, 69, 19, 0.16);
    --qr-border-panel: rgba(230, 0, 38, 0.12);
    --qr-border-accent: rgba(184, 134, 11, 0.38);
    --qr-shadow-soft: rgba(44, 24, 16, 0.07);
    --qr-rail-top: var(--color-secondary);
    --qr-rail-mid: var(--color-text-accent);
    --qr-rail-deep: #4f2a1f;
    --qr-rail-glow: rgba(230, 0, 38, 0.08);

    min-height: 60vh;
    padding: 2rem 0 3rem;
    font-family: var(--font-body, "Nunito", sans-serif);
    color: var(--color-text-primary);
    background: var(--color-background-primary);
}

.qrcode-page-hero {
    text-align: center;
    margin-bottom: 2rem;
    padding: 0 1rem 0.25rem;
    position: relative;
}

.qrcode-page-hero::after {
    content: "";
    display: block;
    margin: 1.25rem auto 0;
    max-width: 20rem;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 215, 0, 0.35) 15%,
        var(--color-secondary) 45%,
        var(--color-text-accent) 55%,
        rgba(255, 215, 0, 0.35) 85%,
        transparent 100%
    );
    opacity: 0.95;
}

.qrcode-page-hero h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 800;
    color: var(--color-primary);
    margin: 0 0 0.5rem;
}

.qrcode-page-hero p {
    margin: 0 auto;
    max-width: 36rem;
    line-height: 1.55;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.qrcode-layout {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

@media (min-width: 900px) {
    .qrcode-layout {
        grid-template-columns: minmax(280px, 1fr) minmax(320px, 1.1fr);
        align-items: start;
    }

    .qrcode-preview-panel {
        align-self: start;
    }
}

.qrcode-panel {
    background: var(--qr-surface-soft);
    border-radius: 18px;
    padding: 1.35rem 1.25rem 1.45rem;
    box-shadow:
        0 2px 0 rgba(255, 255, 255, 0.95) inset,
        0 10px 36px var(--qr-shadow-soft);
    border: 1px solid var(--qr-border-panel);
    position: relative;
}

.qrcode-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 18px;
    pointer-events: none;
    box-shadow:
        0 0 0 1px rgba(255, 215, 0, 0.2) inset,
        0 0 0 1px rgba(255, 255, 255, 0.75) inset;
}

.qrcode-panel-title {
    font-size: 1.15rem;
    margin: 0 0 1.25rem;
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.qrcode-form-section {
    position: relative;
    margin-bottom: 1.25rem;
    padding: 1.05rem 1rem 1.15rem 1.15rem;
    border-radius: 14px;
    background: linear-gradient(
        145deg,
        rgba(255, 255, 255, 0.98) 0%,
        var(--color-background-primary) 42%,
        var(--qr-surface) 100%
    );
    border: 1px solid var(--qr-border-subtle);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.88) inset,
        0 6px 20px var(--qr-shadow-soft);
    overflow: hidden;
}

.qrcode-form-section::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    border-radius: 14px 0 0 14px;
    background: linear-gradient(
        180deg,
        var(--qr-rail-top) 0%,
        var(--qr-rail-mid) 48%,
        var(--qr-rail-deep) 100%
    );
    box-shadow: 2px 0 10px var(--qr-rail-glow);
}

.qrcode-form-section:last-of-type {
    margin-bottom: 0;
}

.qrcode-form-section-title {
    font-size: 0.74rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--color-text-primary);
    margin: 0 0 0.55rem;
    padding: 0 0 0.5rem 0.35rem;
    border-bottom: 1px solid var(--qr-border-accent);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.9);
}

.qrcode-section-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0 0 0.85rem;
    padding-left: 0.35rem;
    line-height: 1.55;
}

.qrcode-hint-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-accent);
    margin: 0.35rem 0 0.4rem;
    padding-left: 0.2rem;
}

.qrcode-chip-row {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.4rem;
    margin-bottom: 0.65rem;
    overflow-x: auto;
    padding-bottom: 0.15rem;
    scrollbar-width: thin;
}

.qrcode-chip-row--wrap {
    flex-wrap: wrap;
    overflow-x: visible;
}

.qrcode-chip {
    flex: 0 0 auto;
    appearance: none;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.45rem 0.65rem;
    border-radius: 999px;
    border: 1px solid var(--qr-border-subtle);
    background: var(--color-background-primary);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.qrcode-chip:hover {
    border-color: var(--qr-border-accent);
    color: var(--color-text-primary);
    background: var(--color-background-secondary);
}

.qrcode-chip:focus-visible {
    outline: 2px solid var(--color-text-accent);
    outline-offset: 2px;
}

.qrcode-chip.is-active {
    border-color: rgba(230, 0, 38, 0.35);
    background: linear-gradient(
        135deg,
        var(--color-background-primary) 0%,
        rgba(255, 215, 0, 0.22) 100%
    );
    color: var(--color-text-primary);
    box-shadow: 0 1px 4px var(--qr-rail-glow);
}

.qrcode-chip--ecc {
    min-width: 2.5rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.qrcode-select {
    width: 100%;
    box-sizing: border-box;
    min-height: 2.75rem;
    padding: 0.55rem 2.5rem 0.55rem 0.75rem;
    border: 1px solid var(--qr-border-subtle);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    font-weight: 500;
    color: var(--color-text-primary);
    background-color: var(--qr-surface);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238B4513' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.65rem center;
    background-size: 1rem;
    cursor: pointer;
    appearance: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.qrcode-select:hover {
    border-color: var(--qr-border-accent);
}

.qrcode-select:focus-visible {
    outline: none;
    border-color: rgba(230, 0, 38, 0.45);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.22);
}

.qrcode-select--compact {
    margin-top: 0.35rem;
    min-height: 2.4rem;
    font-size: 0.88rem;
    color: var(--color-text-secondary);
}

.qrcode-field-row-tight {
    margin-top: 0.5rem;
}

.qrcode-btn-inline {
    margin-top: 0.5rem;
}

@media (prefers-reduced-motion: reduce) {
    .qrcode-chip,
    .qrcode-select,
    .qrcode-btn {
        transition: none;
    }

    .qrcode-btn:active {
        transform: none;
    }
}

.qrcode-field {
    margin-bottom: 1rem;
}

.qrcode-field:last-child {
    margin-bottom: 0;
}

.qrcode-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--color-text-secondary);
}

.qrcode-field input[type="text"],
.qrcode-field input[type="url"],
.qrcode-field input[type="number"] {
    width: 100%;
    box-sizing: border-box;
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--qr-border-input);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-background-primary);
}

.qrcode-field input:focus {
    outline: 2px solid rgba(230, 0, 38, 0.35);
    outline-offset: 1px;
}

.qrcode-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Thanh trượt — track mảnh, tông kem; thumb vàng không viền đậm; không outline khi kéo */
.qrcode-page-main input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 1.25rem;
    margin: 0.15rem 0 0.1rem;
    background: transparent;
    accent-color: var(--color-secondary);
    cursor: pointer;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

/* Bỏ khung chữ nhật / chấm chấm của trình duyệt khi focus (đặc biệt Firefox) */
.qrcode-page-main input[type="range"]::-moz-focus-outer {
    border: 0;
}

.qrcode-page-main input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        rgba(44, 24, 16, 0.12) 0%,
        rgba(139, 69, 19, 0.18) 55%,
        rgba(184, 134, 11, 0.28) 100%
    );
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.85),
        inset 0 -1px 1px rgba(44, 24, 16, 0.06);
}

/* Chỉ khi điều hướng bằng bàn phím: nhấn nhẹ track, không vòng quanh thumb */
.qrcode-page-main input[type="range"]:focus-visible::-webkit-slider-runnable-track {
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.85),
        inset 0 -1px 1px rgba(44, 24, 16, 0.06),
        0 0 0 2px rgba(184, 134, 11, 0.35);
}

.qrcode-page-main input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    margin-top: -5px;
    border-radius: 50%;
    border: none;
    background: radial-gradient(
        circle at 30% 25%,
        #fffef5 0%,
        var(--color-secondary) 52%,
        #e6c200 100%
    );
    box-shadow:
        0 1px 3px rgba(44, 24, 16, 0.18),
        0 0 0 1px rgba(255, 255, 255, 0.65) inset,
        0 0 0 1px rgba(184, 134, 11, 0.25);
}

.qrcode-page-main input[type="range"]::-moz-range-track {
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        rgba(44, 24, 16, 0.12) 0%,
        rgba(139, 69, 19, 0.18) 55%,
        rgba(184, 134, 11, 0.28) 100%
    );
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.85),
        inset 0 -1px 1px rgba(44, 24, 16, 0.06);
}

.qrcode-page-main input[type="range"]:focus-visible::-moz-range-track {
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.85),
        inset 0 -1px 1px rgba(44, 24, 16, 0.06),
        0 0 0 2px rgba(184, 134, 11, 0.35);
}

.qrcode-page-main input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: none;
    background: radial-gradient(
        circle at 30% 25%,
        #fffef5 0%,
        var(--color-secondary) 52%,
        #e6c200 100%
    );
    box-shadow:
        0 1px 3px rgba(44, 24, 16, 0.18),
        0 0 0 1px rgba(255, 255, 255, 0.65) inset,
        0 0 0 1px rgba(184, 134, 11, 0.25);
}

.qrcode-range-value {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 0.2rem;
}

.qrcode-color-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.qrcode-color-row input[type="color"] {
    width: 44px;
    height: 36px;
    padding: 2px;
    border: 1px solid var(--qr-border-input);
    border-radius: 8px;
    cursor: pointer;
}

.qrcode-color-row input[type="text"] {
    flex: 1;
}

.qrcode-inline-check {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    font-weight: 500;
    margin: 0.35rem 0 0.5rem;
    cursor: pointer;
    color: var(--color-text-secondary);
}

.qrcode-inline-check input {
    width: auto;
    cursor: pointer;
}

.qrcode-field-section {
    padding-top: 0.25rem;
    border-top: 1px dashed var(--qr-border-input);
    margin-top: 0.25rem;
}

.qrcode-section-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.qrcode-sublabel {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin: 0.65rem 0 0.3rem;
    color: var(--color-text-secondary);
}

.qrcode-bg-color-row.is-disabled,
.qrcode-container-bg-row.is-disabled {
    opacity: 0.45;
    pointer-events: none;
}

.qrcode-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.qrcode-actions--below-qr {
    margin-top: 1.25rem;
    justify-content: center;
    width: 100%;
    max-width: 100%;
}

.qrcode-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.6rem 1rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.18s ease;
}

.qrcode-btn:active {
    transform: scale(0.98);
}

.qrcode-btn-primary {
    background: var(--color-button-primary);
    color: var(--color-text-header);
    box-shadow: 0 2px 12px var(--color-timer-shadow);
}

.qrcode-btn-primary:hover {
    box-shadow: 0 4px 16px rgba(230, 0, 38, 0.32);
    filter: brightness(1.03);
}

.qrcode-btn-secondary {
    background: var(--color-button-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--qr-border-accent);
}

.qrcode-btn-secondary:hover {
    filter: brightness(1.04);
    box-shadow: 0 1px 6px var(--qr-rail-glow);
}

.qrcode-error {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-event-lunar);
    display: none;
}

.qrcode-error.is-visible {
    display: block;
}

.qrcode-preview-panel {
    background: var(--qr-surface-soft);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow:
        0 2px 0 rgba(255, 255, 255, 0.92) inset,
        0 10px 32px var(--qr-shadow-soft);
    border: 1px solid var(--qr-border-panel);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: sticky;
    top: calc(80px + 0.75rem);
    z-index: 40;
    max-height: calc(100vh - 80px - 1.5rem);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.qrcode-preview-panel-title {
    font-size: 1.08rem;
    margin: 0 0 1rem;
    align-self: flex-start;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    padding-bottom: 0.35rem;
    border-bottom: 2px solid var(--qr-border-accent);
    width: 100%;
}

.qrcode-bg-wrap {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    border-style: solid;
    border-color: transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.qrcode-preview-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    width: 100%;
    box-sizing: border-box;
}

.qrcode-preview-inner.qrcode-preview-inner--checkered {
    background: repeating-conic-gradient(#ebebeb 0% 25%, #ffffff 0% 50%) 50% / 18px 18px;
}

.qrcode-qr-slot {
    position: relative;
    z-index: 1;
    line-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

#qr-canvas-container {
    line-height: 0;
    contain: layout;
}

#qr-canvas-container canvas,
#qr-canvas-container svg {
    max-width: 100%;
    height: auto;
    display: block;
}

.qrcode-empty-hint {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1rem 1.5rem;
    margin: 0;
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.45;
    pointer-events: none;
    z-index: 0;
}

.qrcode-empty-hint.is-hidden {
    display: none;
}

.qrcode-privacy-note {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 28rem;
    line-height: 1.45;
}

.qrcode-file-hint {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}