:root {
    color-scheme: dark;
    --bg-0: #030507;
    --bg-1: #071015;
    --bg-2: #0a141a;
    --surface: rgba(10, 17, 22, 0.88);
    --surface-raised: rgba(17, 27, 34, 0.94);
    --surface-soft: rgba(6, 13, 17, 0.72);
    --surface-hover: rgba(18, 34, 39, 0.92);
    --text: #f3f8f7;
    --text-muted: #9eb1b0;
    --text-faint: #708382;
    --border: rgba(179, 214, 210, 0.12);
    --border-strong: rgba(153, 246, 228, 0.27);
    --edge-highlight: rgba(255, 255, 255, 0.065);
    --primary: #0f8f82;
    --primary-hover: #13a596;
    --primary-active: #0b746a;
    --primary-text: #ffffff;
    --accent: #54d6c4;
    --accent-strong: #7ce8d8;
    --accent-soft: rgba(35, 180, 163, 0.10);
    --accent-glow: rgba(32, 192, 172, 0.18);
    --secondary-glow: rgba(91, 111, 168, 0.12);
    --danger: #ff7b89;
    --danger-bg: rgba(116, 29, 44, 0.26);
    --danger-hover: rgba(142, 34, 52, 0.36);
    --success: #69d49a;
    --focus: #8df2e2;
    --shadow-card: 0 26px 72px rgba(0, 0, 0, 0.42), 0 2px 10px rgba(0, 0, 0, 0.22);
    --shadow-control: 0 12px 34px rgba(0, 0, 0, 0.24);
    --radius-xl: 26px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 11px;
    --content-width: 1120px;
    --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html[data-theme="light"] {
    color-scheme: light;
    --bg-0: #e9efef;
    --bg-1: #f3f7f6;
    --bg-2: #ffffff;
    --surface: rgba(255, 255, 255, 0.90);
    --surface-raised: rgba(249, 252, 252, 0.98);
    --surface-soft: rgba(239, 246, 245, 0.82);
    --surface-hover: rgba(233, 244, 242, 0.98);
    --text: #142322;
    --text-muted: #526866;
    --text-faint: #728683;
    --border: rgba(29, 73, 68, 0.14);
    --border-strong: rgba(15, 118, 110, 0.30);
    --edge-highlight: rgba(255, 255, 255, 0.84);
    --primary: #0f766e;
    --primary-hover: #0b665f;
    --primary-active: #09564f;
    --primary-text: #ffffff;
    --accent: #087f74;
    --accent-strong: #065f58;
    --accent-soft: rgba(15, 118, 110, 0.08);
    --accent-glow: rgba(15, 118, 110, 0.10);
    --secondary-glow: rgba(76, 91, 132, 0.08);
    --danger: #b52b43;
    --danger-bg: rgba(181, 43, 67, 0.08);
    --danger-hover: rgba(181, 43, 67, 0.14);
    --success: #187a42;
    --focus: #087f74;
    --shadow-card: 0 24px 70px rgba(35, 58, 55, 0.14), 0 2px 10px rgba(35, 58, 55, 0.07);
    --shadow-control: 0 12px 30px rgba(35, 58, 55, 0.10);
}

* {
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    min-height: 100%;
    background: var(--bg-0);
}

body {
    position: relative;
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    background:
        radial-gradient(ellipse 70% 48% at 8% -6%, var(--accent-glow), transparent 70%),
        radial-gradient(ellipse 58% 42% at 94% 8%, var(--secondary-glow), transparent 72%),
        radial-gradient(ellipse 46% 32% at 52% 112%, rgba(31, 124, 112, 0.10), transparent 72%),
        linear-gradient(156deg, var(--bg-0) 0%, var(--bg-1) 52%, var(--bg-0) 100%);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -2;
    content: "";
    pointer-events: none;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(235, 255, 252, 0.22) 0.55px, transparent 0.7px),
        linear-gradient(115deg, transparent 0%, rgba(121, 237, 219, 0.025) 46%, transparent 62%);
    background-size: 5px 5px, 100% 100%;
    opacity: 0.19;
    mask-image: linear-gradient(to bottom, black 0%, rgba(0, 0, 0, 0.72) 62%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 0%, rgba(0, 0, 0, 0.72) 62%, transparent 100%);
}

body::after {
    position: fixed;
    inset: -16vh -12vw auto;
    z-index: -1;
    height: 64vh;
    content: "";
    pointer-events: none;
    background:
        repeating-radial-gradient(ellipse at 50% 0%, transparent 0 44px, rgba(111, 226, 209, 0.028) 45px 46px),
        radial-gradient(ellipse at center top, rgba(40, 167, 150, 0.07), transparent 68%);
    filter: blur(0.15px);
    opacity: 0.88;
    transform: perspective(900px) rotateX(58deg) translateY(-23%);
    transform-origin: center top;
    mask-image: radial-gradient(ellipse at center top, black 0%, transparent 72%);
    -webkit-mask-image: radial-gradient(ellipse at center top, black 0%, transparent 72%);
}

html[data-theme="light"] body::before {
    background-image:
        radial-gradient(circle at 1px 1px, rgba(19, 77, 70, 0.22) 0.5px, transparent 0.68px),
        linear-gradient(115deg, transparent 0%, rgba(15, 118, 110, 0.03) 46%, transparent 62%);
    opacity: 0.12;
}

button,
input,
select {
    font: inherit;
}

button,
select,
input[type="number"] {
    min-height: 46px;
}

button {
    touch-action: manipulation;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
[role="button"]:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

button:disabled,
select:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.52;
}

.site-shell {
    position: relative;
    width: min(100%, var(--content-width));
    margin: 0 auto;
    padding: clamp(1rem, 3vw, 2.7rem);
}

.site-shell::before {
    position: absolute;
    top: clamp(4.8rem, 10vw, 8.8rem);
    left: 50%;
    z-index: -1;
    width: min(92vw, 980px);
    height: 420px;
    content: "";
    pointer-events: none;
    background: radial-gradient(ellipse, rgba(32, 189, 169, 0.10), transparent 68%);
    filter: blur(42px);
    transform: translateX(-50%);
}

.site-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: clamp(1.1rem, 3vw, 1.6rem);
}

.brand-block {
    min-width: 0;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin: 0 0 0.42rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.73rem;
    font-weight: 760;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 22px;
    height: 1px;
    content: "";
    background: linear-gradient(90deg, transparent, var(--accent));
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0.42rem;
    font-size: clamp(2rem, 6vw, 3.65rem);
    font-weight: 820;
    line-height: 0.98;
    letter-spacing: -0.055em;
    text-wrap: balance;
}

.site-subtitle {
    max-width: 740px;
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: clamp(0.96rem, 2vw, 1.08rem);
    text-wrap: pretty;
}

.theme-toggle {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-width: 46px;
    padding: 0.66rem 0.86rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: linear-gradient(180deg, var(--surface-raised), var(--surface));
    color: var(--text);
    box-shadow: var(--shadow-control), inset 0 1px 0 var(--edge-highlight);
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.theme-toggle:hover {
    border-color: var(--border-strong);
    background: var(--surface-hover);
    transform: translateY(-1px);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.app-grid {
    display: grid;
    gap: clamp(0.9rem, 2vw, 1.15rem);
}

.card {
    position: relative;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 34%),
        var(--surface);
    box-shadow: var(--shadow-card), inset 0 1px 0 var(--edge-highlight);
    backdrop-filter: blur(22px) saturate(115%);
    -webkit-backdrop-filter: blur(22px) saturate(115%);
}

.card::after {
    position: absolute;
    inset: 0;
    content: "";
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(126deg, rgba(125, 239, 222, 0.035), transparent 33%, transparent 72%, rgba(119, 134, 181, 0.025));
}

.card > * {
    position: relative;
    z-index: 1;
}

.upload-card {
    padding: clamp(0.8rem, 2.3vw, 1.35rem);
}

.drop-zone {
    position: relative;
    display: grid;
    min-height: clamp(245px, 36vw, 330px);
    overflow: hidden;
    place-items: center;
    padding: clamp(1.35rem, 5vw, 3.35rem);
    border: 1px solid var(--border-strong);
    border-radius: calc(var(--radius-xl) - 7px);
    background:
        radial-gradient(circle at 50% 42%, var(--accent-soft), transparent 48%),
        radial-gradient(circle at 1px 1px, rgba(125, 232, 216, 0.105) 0.8px, transparent 0.9px),
        linear-gradient(145deg, var(--surface-soft), rgba(8, 18, 23, 0.42));
    background-size: auto, 21px 21px, auto;
    text-align: center;
    cursor: pointer;
    transition: border-color 170ms ease, background 170ms ease, transform 170ms ease, box-shadow 170ms ease;
}

html[data-theme="light"] .drop-zone {
    background:
        radial-gradient(circle at 50% 42%, var(--accent-soft), transparent 48%),
        radial-gradient(circle at 1px 1px, rgba(15, 118, 110, 0.13) 0.75px, transparent 0.9px),
        linear-gradient(145deg, var(--surface-soft), rgba(255, 255, 255, 0.62));
    background-size: auto, 21px 21px, auto;
}

.drop-zone::before {
    position: absolute;
    inset: 12px;
    content: "";
    pointer-events: none;
    border: 1px dashed rgba(122, 229, 213, 0.22);
    border-radius: calc(var(--radius-xl) - 13px);
}

.drop-zone::after {
    position: absolute;
    width: min(72%, 560px);
    height: 120px;
    content: "";
    pointer-events: none;
    background: radial-gradient(ellipse, rgba(61, 211, 190, 0.10), transparent 72%);
    filter: blur(22px);
    transform: translateY(35%);
}

.drop-zone:hover,
.drop-zone.is-dragging {
    border-color: var(--accent);
    background-color: var(--surface-hover);
    box-shadow: inset 0 0 0 1px rgba(119, 235, 218, 0.12), 0 18px 46px rgba(3, 12, 14, 0.22);
}

.drop-zone.is-dragging {
    transform: scale(0.996);
}

.upload-content {
    width: min(100%, 690px);
}

.upload-icon {
    display: inline-grid;
    width: 66px;
    height: 66px;
    margin-bottom: 1.05rem;
    place-items: center;
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    background: linear-gradient(155deg, var(--surface-raised), var(--surface-soft));
    color: var(--accent-strong);
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.22), inset 0 1px 0 var(--edge-highlight);
}

.upload-icon svg {
    width: 32px;
    height: 32px;
}

.upload-title {
    margin-bottom: 0.38rem;
    font-size: clamp(1.25rem, 3vw, 1.62rem);
    font-weight: 800;
    letter-spacing: -0.025em;
}

.upload-subtitle,
.field-help,
.status-text,
.result-summary,
.footer-note {
    color: var(--text-muted);
}

.upload-subtitle {
    margin-bottom: 0;
    font-size: 0.9rem;
    text-wrap: pretty;
}

.file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.file-summary {
    display: none;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    margin-top: 1rem;
    padding: 0.82rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-raised);
    box-shadow: inset 0 1px 0 var(--edge-highlight);
    text-align: left;
}

.file-summary.is-visible {
    display: grid;
}

.file-details {
    min-width: 0;
}

.file-name {
    display: block;
    overflow: hidden;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.84rem;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    display: block;
    margin-top: 0.2rem;
    color: var(--text-muted);
    font-size: 0.78rem;
}

.icon-button {
    display: inline-grid;
    width: 44px;
    min-height: 44px;
    padding: 0;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-soft);
    color: var(--danger);
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease;
}

.icon-button:hover {
    border-color: var(--danger);
    background: var(--danger-bg);
}

.icon-button svg {
    width: 18px;
    height: 18px;
}

.structure-status {
    min-height: 1.4rem;
    margin-top: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.77rem;
    overflow-wrap: anywhere;
}

.controls-card,
.progress-card,
.results-card {
    padding: clamp(1rem, 3vw, 1.55rem);
}

.controls-grid {
    display: grid;
    gap: 1rem;
}

.field-group {
    min-width: 0;
}

.field-label {
    display: block;
    margin-bottom: 0.42rem;
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 760;
}

select,
input[type="number"] {
    width: 100%;
    padding: 0.72rem 0.88rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--surface-raised);
    color: var(--text);
    box-shadow: inset 0 1px 0 var(--edge-highlight);
    transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

select:hover,
input[type="number"]:hover {
    border-color: var(--accent);
}

select:focus,
input[type="number"]:focus {
    background: var(--surface-hover);
    box-shadow: 0 0 0 4px rgba(83, 218, 198, 0.08);
}

.field-help {
    min-height: 1.2rem;
    margin: 0.36rem 0 0;
    font-size: 0.73rem;
    line-height: 1.4;
}

.action-row {
    display: grid;
    gap: 0.7rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    min-width: 0;
    padding: 0.74rem 1rem;
    border: 1px solid transparent;
    border-radius: 12px;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.015em;
    line-height: 1.2;
    text-align: center;
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.button:hover:not(:disabled) {
    transform: translateY(-1px);
}

.button-primary {
    border-color: rgba(131, 245, 228, 0.16);
    background: linear-gradient(135deg, var(--primary-active), var(--primary));
    color: var(--primary-text);
    box-shadow: 0 12px 28px rgba(13, 129, 117, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.button-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    box-shadow: 0 15px 34px rgba(13, 129, 117, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.button-primary:active:not(:disabled) {
    background: var(--primary-active);
    transform: translateY(0);
}

.button-secondary {
    border-color: var(--border-strong);
    background: linear-gradient(180deg, var(--surface-raised), var(--surface-soft));
    color: var(--text);
    box-shadow: inset 0 1px 0 var(--edge-highlight);
}

.button-secondary:hover:not(:disabled) {
    border-color: var(--accent);
    background: var(--surface-hover);
}

.button-danger {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger);
}

.button-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.is-hidden {
    display: none !important;
}

.progress-card h2,
.results-card h2 {
    margin-bottom: 0.2rem;
    font-size: 1.05rem;
    letter-spacing: -0.015em;
}

.progress-track {
    height: 11px;
    margin: 1rem 0 0.66rem;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-soft);
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.16);
}

.progress-bar {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary-active), var(--accent-strong));
    box-shadow: 0 0 18px rgba(66, 218, 196, 0.28);
    transition: width 120ms linear;
}

.progress-stats {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.progress-label {
    min-width: 0;
    overflow-wrap: anywhere;
}

.progress-percent {
    flex: 0 0 auto;
    color: var(--text);
    font-weight: 800;
}

.results-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.result-summary {
    margin-bottom: 0;
    font-size: 0.84rem;
}

.result-list {
    display: grid;
    gap: 0.65rem;
}

.result-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.7rem;
    align-items: center;
    padding: 0.82rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--surface-soft), rgba(19, 31, 37, 0.44));
    box-shadow: inset 0 1px 0 var(--edge-highlight);
}

html[data-theme="light"] .result-item {
    background: linear-gradient(145deg, var(--surface-soft), rgba(255, 255, 255, 0.62));
}

.result-main {
    min-width: 0;
}

.result-name {
    display: block;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 0.79rem;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.result-meta {
    display: block;
    margin-top: 0.2rem;
    color: var(--text-muted);
    font-size: 0.73rem;
}

.result-download {
    width: 100%;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    margin-top: 1rem;
}

.page-status {
    min-width: 7rem;
    color: var(--text-muted);
    font-size: 0.79rem;
    text-align: center;
}

.results-actions {
    display: grid;
    gap: 0.7rem;
    margin-top: 1rem;
}

.status-text {
    min-height: 1.4rem;
    margin: 0.8rem 0 0;
    font-size: 0.78rem;
    overflow-wrap: anywhere;
}

.toast-region {
    position: fixed;
    right: max(1rem, env(safe-area-inset-right));
    bottom: max(1rem, env(safe-area-inset-bottom));
    z-index: 50;
    display: grid;
    width: min(calc(100vw - 2rem), 420px);
    gap: 0.6rem;
    pointer-events: none;
}

.toast {
    padding: 0.9rem 1rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    background: var(--surface-raised);
    color: var(--text);
    box-shadow: var(--shadow-card);
    font-size: 0.82rem;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 160ms ease, transform 160ms ease;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.toast[data-type="error"] {
    border-color: var(--danger);
}

.toast[data-type="success"] {
    border-color: var(--success);
}

.site-footer {
    padding: 1.2rem 0 0.25rem;
    text-align: center;
}

.footer-note {
    margin-bottom: 0;
    font-size: 0.74rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (min-width: 560px) {
    .action-row,
    .results-actions {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .result-item {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .result-download {
        width: auto;
        min-width: 122px;
    }
}

@media (min-width: 760px) {
    .controls-grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .action-row {
        grid-column: 1 / -1;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 980px) {
    .controls-grid {
        grid-template-columns: minmax(220px, 1fr) minmax(180px, 0.72fr) minmax(420px, 1.42fr);
        align-items: end;
    }

    .action-row {
        grid-column: auto;
    }
}

@media (max-width: 559px) {
    .site-shell {
        padding-inline: max(0.8rem, env(safe-area-inset-left));
    }

    .card {
        border-radius: 21px;
    }

    .drop-zone {
        min-height: 235px;
        padding-inline: 1rem;
        border-radius: 15px;
    }

    .drop-zone::before {
        inset: 9px;
        border-radius: 11px;
    }

    .file-summary {
        align-items: start;
    }

    .button {
        min-height: 48px;
    }
}

@media (max-width: 480px) {
    .site-header {
        align-items: center;
    }

    .theme-toggle span {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
    }

    .progress-stats {
        display: grid;
        gap: 0.25rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}