html {
    --bg: #0d0f12;
    --surface: #16191e;
    --border: rgba(255, 255, 255, 0.08);
    --text: #f0f4f8;
    --text-secondary: #8a99ad;
    --muted: #525c6b;
    --green: #00ff87;
    --blue: #00e5ff;
    --amber: #ffb800;
    --glow-green: 0 0 15px rgba(0, 255, 135, 0.15);
    --header-bg: rgba(13, 15, 18, 0.8);
    --input-bg: #0d0f12;
    --chip-bg: #0d0f12;
    --btn-fg: #04140c;
    --ghost-bg: rgba(255, 255, 255, 0.05);
    --ghost-hover: rgba(0, 229, 255, 0.08);
    --drop-bg: rgba(0, 229, 255, 0.03);
    --drop-border: rgba(0, 229, 255, 0.35);
    --error: #ff6b6b;
    --hover-border: rgba(0, 255, 135, 0.25);
    --arrow: #00e5ff;
    --arrow-glow: 0 0 8px rgba(0, 229, 255, 0.55);
    --lock-bg: rgba(0, 255, 135, 0.12);
    --who-glow: 0 0 8px rgba(255, 184, 0, 0.7);
    --alert-border: rgba(255, 184, 0, 0.45);
    --alert-fill: rgba(255, 184, 0, 0.08);
    --radius: 12px;
    --font: "Inter", "Segoe UI", sans-serif;
    --mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
}

html[data-theme="light"] {
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-secondary: #64748b;
    --muted: #64748b;
    --green: #16a34a;
    --blue: #0284c7;
    --amber: #d97706;
    --glow-green: none;
    --header-bg: rgba(248, 250, 252, 0.92);
    --input-bg: #ffffff;
    --chip-bg: #f1f5f9;
    --btn-fg: #ffffff;
    --ghost-bg: #ffffff;
    --ghost-hover: #f0f9ff;
    --drop-bg: #f8fafc;
    --drop-border: #bae6fd;
    --error: #dc2626;
    --hover-border: #cbd5e1;
    --arrow: #0284c7;
    --arrow-glow: none;
    --lock-bg: #dcfce7;
    --who-glow: none;
    --alert-border: #fcd34d;
    --alert-fill: #fffbeb;
}

[hidden] {
    display: none !important;
}

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

html {
    color-scheme: dark;
}

html[data-theme="light"] {
    color-scheme: light;
}

body {
    font-family: var(--font);
    margin: 0;
    padding: 0;
    color: var(--text);
    background: var(--bg);
    line-height: 1.55;
    min-height: 100vh;
}

a {
    color: var(--blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1,
h2,
h3 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

code,
.mono,
[data-code],
table.db td:nth-child(3),
table.db td:nth-child(4) {
    font-family: var(--mono);
}

.top {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 14px 24px;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-weight: 700;
    letter-spacing: 0.04em;
    text-decoration: none;
    color: var(--text);
}

.logo:hover {
    color: var(--green);
    text-decoration: none;
}

nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 16px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
}

nav a:hover {
    color: var(--blue);
    text-decoration: none;
}

.who {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    font-size: 0.85em;
}

.who::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: var(--who-glow);
}

main {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 20px 24px;
}

body.wide main {
    max-width: 960px;
}

.card,
.stat-card,
.chain,
.step-card,
form.auth,
form.upload,
.privacy-lock,
.alert-amber {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.stat-card,
.chain,
.step-card,
.privacy-lock,
.alert-amber,
form.auth,
form.upload {
    padding: 18px 20px;
}

.stat-card,
.chain,
.step-card {
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover,
.chain:hover,
.step-card:hover {
    box-shadow: var(--glow-green);
    border-color: var(--hover-border);
}

.flashes {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
}

.flashes li {
    margin-bottom: 8px;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
}

.flashes .ok {
    color: var(--green);
}

.flashes .error {
    color: var(--error);
}

form.auth {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 400px;
}

form.auth label,
form.thresholds label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

input,
button {
    font: inherit;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
    padding: 8px 10px;
    color: var(--text);
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}

button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    width: fit-content;
    cursor: pointer;
    color: var(--btn-fg);
    background: var(--green);
    border: 0;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--glow-green);
}

button:hover,
.btn:hover {
    filter: brightness(1.05);
    text-decoration: none;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
    box-shadow: none;
}

.btn-ghost,
form.thresholds button,
.file-toolbar button,
.chain-actions .btn-ghost {
    color: var(--blue);
    background: var(--ghost-bg);
    border: 1px solid var(--blue);
    box-shadow: none;
}

.btn-ghost:hover,
form.thresholds button:hover,
.file-toolbar button:hover {
    background: var(--ghost-hover);
    box-shadow: none;
}

form.upload.has-files [data-file-submit]:not(:disabled) {
    box-shadow: var(--glow-green);
}

.lead {
    font-size: 1.15em;
    color: var(--text-secondary);
}

.ok {
    color: var(--green);
}

.warn {
    color: var(--error);
}

.money,
.stat-card .sum {
    font-family: var(--mono);
    color: var(--amber);
}

table.db {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

table.db th,
table.db td {
    border: 1px solid var(--border);
    padding: 8px 10px;
    text-align: left;
    vertical-align: top;
}

table.db th {
    color: var(--text-secondary);
    font-weight: 500;
}

form.upload {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 180px;
    padding: 28px 16px;
    text-align: center;
    color: var(--text-secondary);
    border: 1.5px dashed var(--drop-border);
    border-radius: var(--radius);
    background: var(--drop-bg);
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.dropzone:hover,
form.upload.drag .dropzone,
.dropzone:focus-visible {
    border-color: var(--blue);
    box-shadow: none;
    background: var(--ghost-hover);
}

.dropzone strong {
    color: var(--text);
}

form.upload input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
}

.file-toolbar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

form.upload.is-busy .dropzone {
    animation: oprf-pulse 1.4s ease-in-out infinite;
    border-color: var(--green);
}

@keyframes oprf-pulse {
    0%,
    100% {
        box-shadow: var(--glow-green);
    }
    50% {
        box-shadow: var(--glow-green);
    }
}

.privacy-lock {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: var(--text-secondary);
    font-size: 0.95em;
}

.privacy-lock .lock {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--lock-bg);
    color: var(--green);
    display: grid;
    place-items: center;
    font-size: 14px;
    box-shadow: var(--glow-green);
}

.privacy-lock strong {
    color: var(--green);
}

.status-oprf {
    font-family: var(--mono);
    font-size: 0.85em;
    color: var(--green);
}

body.wide {
    max-width: none;
}

form.thresholds {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    align-items: end;
    margin: 16px 0;
}

form.thresholds input {
    width: 8em;
}

.muted {
    color: var(--muted);
    font-size: 0.95em;
}

.chain {
    margin: 22px 0;
}

.chain h2 {
    margin-top: 0;
}

.chain-summary {
    margin: -8px 0 18px;
    font-size: 1.05em;
    color: var(--text-secondary);
}

.chain-summary .mono {
    color: var(--text);
}

.firm-report-filter {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: 28em;
    margin: 0 0 18px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.firm-report-filter[hidden] {
    display: none;
}

.firm-report-filter select {
    padding: 8px 10px;
    color: var(--text);
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    max-width: 100%;
}

.chain-path {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 6px;
    font-size: 0.92em;
}

.chain-path [data-code] {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--chip-bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
}

.chain-path .code-unknown,
table.db .code-unknown {
    font-family: var(--mono);
    color: var(--text-secondary);
}

.chain-arrow {
    color: var(--arrow);
    padding: 0 2px;
    font-size: 1.15em;
    font-weight: 600;
    text-shadow: var(--arrow-glow);
}

.ratio-high {
    color: var(--green);
    font-family: var(--mono);
}

.chain-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.home-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 20px 0;
}

.home-stats .label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85em;
}

.home-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0;
}

.home-actions .btn,
.chain-actions .btn,
a.btn {
    text-decoration: none;
}

a.btn:hover {
    text-decoration: none;
}

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 0;
    margin: 0;
    list-style: none;
}

@media (min-width: 720px) {
    .steps {
        grid-template-columns: 1fr 1fr;
    }

    .steps li:last-child {
        grid-column: 1 / -1;
    }
}

.step-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
}

.step-num {
    font-family: var(--mono);
    color: var(--green);
    font-size: 1.2em;
    line-height: 1;
}

.alert-amber {
    border-color: var(--alert-border);
    color: var(--text-secondary);
}

.alert-amber strong {
    color: var(--amber);
}

.step-card .alert-amber {
    margin-top: 10px;
    padding: 12px 14px;
    background: var(--alert-fill);
}

footer {
    max-width: 720px;
    margin: 48px auto 0;
    padding: 16px 20px 40px;
    border-top: 1px solid var(--border);
    font-size: 0.85em;
    color: var(--muted);
}

body.wide footer {
    max-width: 960px;
}

footer p {
    margin: 0 0 8px;
}

.foot-nav a {
    margin-right: 16px;
}

.page-back {
    margin-top: 36px;
}

.page-back .btn-ghost {
    font-weight: 500;
    font-size: 0.92em;
}

[data-upload-result] table.db {
    margin: 16px 0;
    background: var(--surface);
}

@media (max-width: 640px) {
    .home-stats {
        grid-template-columns: 1fr;
    }

    nav {
        width: 100%;
    }
}

form.settings {
    max-width: 440px;
}

form.settings fieldset {
    margin: 0 0 16px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

form.settings legend {
    padding: 0 6px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.settings-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.settings-options label {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    color: var(--text);
    font-size: 1em;
}

.settings-options select {
    padding: 8px 10px;
    color: var(--text);
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
}