:root {
    --bg: #0f0a1a;
    --bg-soft: rgba(18, 13, 35, 0.8);
    --panel: rgba(24, 18, 43, 0.82);
    --panel-strong: rgba(31, 24, 55, 0.96);
    --text: #f9f5ff;
    --muted: #b7b1ca;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #ff6a3d;
    --accent-2: #ff2d7a;
    --accent-3: #ffd166;
    --good: #31d0aa;
    --danger: #ff607f;
    --shadow: 0 28px 90px rgba(5, 3, 12, 0.42);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-theme="inferno"] {
    --bg: #0f0918;
    --bg-soft: rgba(19, 11, 28, 0.82);
    --panel: rgba(21, 16, 35, 0.86);
    --panel-strong: rgba(26, 19, 44, 0.97);
    --text: #fff6f1;
    --muted: #d9b8ad;
    --line: rgba(255, 255, 255, 0.11);
    --accent: #ff6a3d;
    --accent-2: #ff2d7a;
    --accent-3: #ffb347;
    --good: #4ed0b3;
    --danger: #ff658b;
}

html[data-theme="midnight"] {
    --bg: #07131f;
    --bg-soft: rgba(7, 19, 31, 0.82);
    --panel: rgba(10, 28, 45, 0.86);
    --panel-strong: rgba(10, 33, 54, 0.98);
    --text: #eef7ff;
    --muted: #9fb9cf;
    --line: rgba(255, 255, 255, 0.09);
    --accent: #4d9dff;
    --accent-2: #7b61ff;
    --accent-3: #6ee7ff;
    --good: #3ad0bf;
    --danger: #ff6d92;
}

html[data-theme="aurora"] {
    --bg: #081a16;
    --bg-soft: rgba(8, 26, 22, 0.82);
    --panel: rgba(9, 33, 28, 0.86);
    --panel-strong: rgba(11, 41, 34, 0.98);
    --text: #f0fff9;
    --muted: #abd3c6;
    --line: rgba(255, 255, 255, 0.09);
    --accent: #37d39a;
    --accent-2: #2dd4bf;
    --accent-3: #c6ff7f;
    --good: #8cffb0;
    --danger: #ff6f9f;
}

html[data-theme="paper"] {
    --bg: #f4efe7;
    --bg-soft: rgba(255, 250, 244, 0.86);
    --panel: rgba(255, 255, 255, 0.92);
    --panel-strong: rgba(255, 255, 255, 0.98);
    --text: #23181b;
    --muted: #6c5c66;
    --line: rgba(35, 24, 27, 0.1);
    --accent: #d4512d;
    --accent-2: #7c4dff;
    --accent-3: #efb74d;
    --good: #178f68;
    --danger: #d9486e;
    --shadow: 0 20px 70px rgba(69, 47, 56, 0.12);
}

* {
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 36%, transparent), transparent 26%),
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent-2) 24%, transparent), transparent 34%),
        linear-gradient(180deg, color-mix(in srgb, var(--bg) 92%, black), var(--bg));
}

button,
input,
select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

.backdrop {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 12% 10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 28%),
        radial-gradient(circle at 88% 8%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent 22%),
        radial-gradient(circle at 60% 100%, color-mix(in srgb, var(--accent-3) 10%, transparent), transparent 24%);
    opacity: 0.95;
}

.shell {
    position: relative;
    width: min(1200px, calc(100% - 1.2rem));
    margin: 0 auto;
    padding: 1rem 0 2.25rem;
}

.shell-narrow {
    width: min(900px, calc(100% - 1.2rem));
}

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.glass {
    background: color-mix(in srgb, var(--panel) 80%, transparent);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 1rem;
    margin-bottom: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    min-width: 0;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 1rem;
}

.brand small {
    color: var(--muted);
    font-size: 0.78rem;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 14px 28px color-mix(in srgb, var(--accent) 28%, transparent);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.theme-picker {
    display: inline-flex;
    gap: 0.45rem;
    padding: 0.35rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--panel-strong) 72%, transparent);
    border: 1px solid var(--line);
}

.theme-swatch {
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 999px;
    border: 0;
    cursor: pointer;
    position: relative;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.theme-swatch:nth-child(1) { background: linear-gradient(135deg, #ff7a45, #ff2f74); }
.theme-swatch:nth-child(2) { background: linear-gradient(135deg, #5bb6ff, #5a62ff); }
.theme-swatch:nth-child(3) { background: linear-gradient(135deg, #39db9d, #b0ff7a); }
.theme-swatch:nth-child(4) { background: linear-gradient(135deg, #ebd6c5, #fffef8); border: 1px solid rgba(0,0,0,0.08); }
.theme-swatch:hover,
.theme-swatch:focus-visible {
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
    outline: none;
}

.theme-swatch.is-active::after {
    content: "";
    position: absolute;
    inset: -0.18rem;
    border-radius: 999px;
    border: 2px solid color-mix(in srgb, var(--text) 75%, transparent);
}

.hero-panel {
    display: grid;
    gap: 1rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    overflow: hidden;
    position: relative;
}

.hero-panel::before {
    content: "";
    position: absolute;
    inset: auto -30% -35% auto;
    width: 15rem;
    height: 15rem;
    border-radius: 999px;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 38%, transparent), transparent 72%);
    opacity: 0.65;
}

.hero-copy,
.hero-stats {
    position: relative;
    z-index: 1;
}

.section-kicker {
    color: var(--accent-3);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.72rem;
    font-weight: 700;
    margin-bottom: 0.7rem;
}

.hero-panel h1,
.share-panel h1,
.login-panel h1,
.admin-hero h1,
.upload-panel h2,
.help-panel h2,
#progress-card h2,
#result-card h2,
.admin-share-card h2 {
    margin: 0;
    line-height: 1.05;
}

.hero-panel h1 {
    font-size: clamp(2.1rem, 5vw, 4.2rem);
    max-width: 10.5ch;
}

.lead {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 64ch;
}

.chip-row,
.summary-pills,
.result-actions,
.action-row,
.selection-toolbar,
.meta-grid,
.progress-line,
.section-heading,
.share-head {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.chip,
.mini-pill,
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.52rem 0.82rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
    border: 1px solid var(--line);
    color: var(--text);
    font-size: 0.8rem;
}

.status-pill {
    background: color-mix(in srgb, var(--accent) 18%, var(--panel-strong));
}

.hero-stats {
    display: grid;
    gap: 0.85rem;
}

.stat-card,
.mini-card,
.queue-summary,
.notice,
.file-card,
.admin-share-card,
.empty-card,
.subtle-panel {
    background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
}

.stat-card {
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
}

.stat-card span,
.meta-grid span,
.small,
.muted {
    color: var(--muted);
}

.stat-card strong {
    display: block;
    margin-top: 0.3rem;
    font-size: 1.15rem;
}

.stat-card small {
    display: block;
    margin-top: 0.35rem;
    color: var(--muted);
}

.notice {
    display: grid;
    gap: 0.45rem;
    padding: 0.95rem 1rem;
    margin-bottom: 1rem;
}

.notice-warning {
    border-left: 4px solid var(--accent-3);
}

.notice-error {
    border-left: 4px solid var(--danger);
}

.main-grid,
.mini-card-grid,
.admin-list,
.step-list,
.share-file-list,
.queue-list,
.upload-log {
    display: grid;
    gap: 1rem;
}

.upload-panel,
.help-panel,
#progress-card,
#result-card,
.share-panel,
.login-panel,
.admin-hero {
    padding: 1.1rem;
}

.stack {
    display: grid;
    gap: 1rem;
}

.compact-form {
    max-width: 28rem;
}

.field-grid {
    display: grid;
    gap: 0.9rem;
}

.field {
    display: grid;
    gap: 0.45rem;
}

.field span {
    font-size: 0.86rem;
    color: var(--muted);
}

input[type="text"],
input[type="password"],
select {
    width: 100%;
    padding: 0.92rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
    color: var(--text);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

input::placeholder {
    color: color-mix(in srgb, var(--muted) 80%, transparent);
}

input:focus,
select:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--accent) 72%, white 6%);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}

.field-static {
    padding: 0.82rem 1rem;
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
    border: 1px solid var(--line);
}

.static-value {
    font-weight: 700;
    font-size: 1.02rem;
}

.button {
    appearance: none;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.82rem 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 2.9rem;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
    outline: none;
}

.button-primary,
.button:not(.button-ghost):not(.button-danger) {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 30%, transparent);
}

.button-ghost {
    background: color-mix(in srgb, var(--panel-strong) 82%, transparent);
    border-color: var(--line);
    color: var(--text);
}

.button-danger {
    background: color-mix(in srgb, var(--danger) 14%, var(--panel-strong));
    border-color: color-mix(in srgb, var(--danger) 26%, transparent);
    color: var(--text);
}

.selection-toolbar {
    justify-content: flex-start;
}

.toolbar-note {
    color: var(--muted);
    font-size: 0.85rem;
}

.dropzone {
    position: relative;
    display: grid;
    gap: 0.45rem;
    padding: 1.2rem;
    border-radius: var(--radius-xl);
    border: 1.5px dashed color-mix(in srgb, var(--accent) 45%, var(--line));
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--panel-strong) 70%, transparent), color-mix(in srgb, var(--panel-strong) 96%, transparent)),
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent 42%);
    min-height: 12rem;
    place-content: center;
    text-align: center;
    cursor: pointer;
    overflow: hidden;
}

.dropzone.dragging {
    border-color: var(--accent-3);
    box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent-3) 35%, transparent), 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}

.dropzone::after {
    content: "";
    position: absolute;
    inset: auto -20% -42% auto;
    width: 11rem;
    height: 11rem;
    border-radius: 999px;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 24%, transparent), transparent 64%);
}

.drop-eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.72rem;
    color: var(--accent-3);
}

.drop-title {
    font-size: clamp(1.45rem, 4vw, 2.15rem);
    font-weight: 800;
}

.drop-subtitle {
    color: var(--muted);
    line-height: 1.5;
}

.queue-summary,
.result-box,
.progress-wrap {
    padding: 0.95rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
}

.queue-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.queue-list {
    min-height: 5rem;
}

.queue-item,
.file-card,
.step-item,
.log-row {
    display: flex;
    gap: 0.85rem;
    align-items: center;
    justify-content: space-between;
    padding: 0.95rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
}

.queue-item > div,
.file-card > div {
    min-width: 0;
}

.queue-item strong,
.file-card strong,
.admin-share-card h2 {
    display: block;
    overflow-wrap: anywhere;
}

.queue-item .path,
.file-card .small {
    overflow-wrap: anywhere;
}

.item-type {
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 70%, black 6%), color-mix(in srgb, var(--accent-2) 64%, black 6%));
    color: white;
    font-size: 0.82rem;
    font-weight: 800;
    flex-shrink: 0;
}

.item-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.icon-button {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--text);
    cursor: pointer;
}

.icon-button:hover,
.icon-button:focus-visible {
    outline: none;
    border-color: color-mix(in srgb, var(--danger) 50%, transparent);
    background: color-mix(in srgb, var(--danger) 14%, transparent);
}

.step-list {
    margin-top: 0.5rem;
}

.step-item {
    align-items: flex-start;
}

.step-item span {
    width: 2.3rem;
    height: 2.3rem;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--accent) 16%, transparent);
    color: var(--accent-3);
    font-weight: 800;
    flex-shrink: 0;
}

.step-item strong,
.mini-card strong,
.queue-summary strong,
.result-box input,
.meta-grid strong {
    display: block;
}

.step-item small,
.mini-card p,
.muted {
    line-height: 1.55;
}

.mini-card-grid {
    grid-template-columns: 1fr;
}

.mini-card {
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
}

.progress-bar {
    width: 100%;
    height: 0.9rem;
    border-radius: 999px;
    overflow: hidden;
    background: color-mix(in srgb, var(--panel-strong) 72%, black 10%);
    margin-bottom: 0.75rem;
}

#progress-bar-fill {
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    transition: width 0.18s ease;
}

.log-row {
    padding: 0.75rem 0.9rem;
    font-size: 0.88rem;
}

.result-box {
    display: grid;
    gap: 0.85rem;
}

.result-box input {
    background: transparent;
    border: 1px solid var(--line);
    padding: 0.9rem 1rem;
    border-radius: var(--radius-md);
}

.help-panel .section-heading,
.upload-panel .section-heading,
.share-panel .section-heading,
.admin-hero .section-heading,
.login-panel .section-heading,
#progress-card .section-heading,
#result-card .section-heading {
    margin-bottom: 1rem;
}

.section-heading.tight {
    margin-bottom: 0.75rem;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
}

.meta-grid div {
    padding: 0.95rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
}

.admin-list {
    margin-top: 1rem;
}

.admin-share-card,
.share-panel,
.login-panel {
    display: grid;
    gap: 1rem;
}

.share-file-list {
    margin-top: 1rem;
}

.login-panel,
.share-panel,
.admin-hero {
    margin-bottom: 1rem;
}

.hidden {
    display: none !important;
}

code {
    font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
    background: color-mix(in srgb, var(--panel-strong) 72%, transparent);
    padding: 0.18rem 0.42rem;
    border-radius: 0.45rem;
    border: 1px solid var(--line);
}

@media (max-width: 700px) {
    .topbar,
    .queue-item,
    .file-card,
    .step-item,
    .log-row {
        align-items: stretch;
    }

    .topbar,
    .queue-item,
    .file-card,
    .step-item,
    .action-row,
    .selection-toolbar,
    .queue-summary,
    .result-actions {
        flex-direction: column;
    }

    .topbar-actions,
    .action-row {
        width: 100%;
    }

    .topbar-actions > *,
    .action-row > *,
    .result-actions > *,
    .selection-toolbar > * {
        width: 100%;
    }

    .button {
        width: 100%;
    }

    .theme-picker {
        justify-content: center;
        width: 100%;
    }

    .hero-panel h1 {
        max-width: 11ch;
    }

    .queue-summary,
    .meta-grid {
        grid-template-columns: 1fr;
    }

    .meta-grid {
        display: grid;
    }
}

@media (min-width: 760px) {
    .shell {
        width: min(1200px, calc(100% - 2.2rem));
        padding-top: 1.3rem;
        padding-bottom: 3rem;
    }

    .hero-panel {
        grid-template-columns: 1.3fr 0.9fr;
        align-items: stretch;
        padding: 1.5rem;
    }

    .hero-stats,
    .mini-card-grid,
    .step-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .main-grid {
        grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
        align-items: start;
    }

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

    .field-grid.three-up {
        grid-template-columns: 1fr 1fr minmax(180px, 0.8fr);
    }

    .result-box {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
    }

    .upload-panel,
    .help-panel,
    #progress-card,
    #result-card,
    .share-panel,
    .login-panel,
    .admin-hero {
        padding: 1.35rem;
    }
}

@media (min-width: 1100px) {
    .hero-panel,
    .upload-panel,
    .help-panel,
    #progress-card,
    #result-card,
    .share-panel,
    .login-panel,
    .admin-hero {
        padding: 1.6rem;
    }

    .hero-panel h1 {
        max-width: 9.5ch;
    }

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