:root {
    color-scheme: light;
    --bg: #f4f6f1;
    --bg-accent: radial-gradient(circle at 20% 20%, #e0ecd8 0%, #f4f6f1 35%), radial-gradient(circle at 80% 0%, #d9ecf7 0%, transparent 40%);
    --surface: #ffffff;
    --surface-2: #f8fbff;
    --text: #112031;
    --muted: #4e5f73;
    --border: #d4dfeb;
    --shadow: 0 14px 40px rgba(35, 62, 90, 0.12);
    --primary: #146c94;
    --primary-2: #0f4f6f;
    --secondary: #2f855a;
    --danger: #b42318;
    --success: #177245;
    --focus: #1d9bf0;
    --btn-tint-strength: 40%;
}

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

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f1724;
    --bg-accent: radial-gradient(circle at 20% 20%, #1f2b3a 0%, #0f1724 45%), radial-gradient(circle at 80% 0%, #25384a 0%, transparent 45%);
    --surface: #192434;
    --surface-2: #1e2c3f;
    --text: #edf4ff;
    --muted: #b4c7df;
    --border: #2f4359;
    --shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
    --primary: #41b3ff;
    --primary-2: #1382d8;
    --secondary: #34c37b;
    --danger: #f97066;
    --success: #42d392;
    --focus: #7cc8ff;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        color-scheme: dark;
        --bg: #0f1724;
        --bg-accent: radial-gradient(circle at 20% 20%, #1f2b3a 0%, #0f1724 45%), radial-gradient(circle at 80% 0%, #25384a 0%, transparent 45%);
        --surface: #192434;
        --surface-2: #1e2c3f;
        --text: #edf4ff;
        --muted: #b4c7df;
        --border: #2f4359;
        --shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
        --primary: #41b3ff;
        --primary-2: #1382d8;
        --secondary: #34c37b;
        --danger: #f97066;
        --success: #42d392;
        --focus: #7cc8ff;
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Outfit", "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg-accent), var(--bg);
    min-height: 100vh;
    line-height: 1.45;
}

.topbar {
    max-width: 1200px;
    margin: 1.25rem auto 0;
    padding: 0 1rem;
    display: flex;
    gap: 1rem;
    justify-content: flex-start;
    align-items: center;
}

.brand-block h1 {
    font-family: "Space Grotesk", "Outfit", sans-serif;
    margin: 0.2rem 0;
    font-size: clamp(1.5rem, 4vw, 2.4rem);
    letter-spacing: -0.02em;
}

.kicker {
    margin: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.subhead {
    margin: 0;
    color: var(--muted);
    max-width: 52ch;
}

.theme-fab {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 999;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    border-radius: 10px;
    padding: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow);
}

.theme-option {
    border: 1px solid transparent;
    border-radius: 8px;
    width: 2.1rem;
    height: 2.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-option:hover {
    color: var(--text);
    background: var(--surface-2);
}

.theme-option.active {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(120deg, var(--primary), var(--primary-2));
}

.theme-option:focus-visible,
.btn:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--focus) 50%, transparent);
    outline-offset: 2px;
}

.page-wrap {
    max-width: 1200px;
    margin: 1rem auto 2rem;
    padding: 0 1rem;
    display: grid;
    gap: 1rem;
}

.panel {
    background: color-mix(in srgb, var(--surface) 95%, transparent);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.helper-panel details {
    padding: 0.9rem 1rem;
}

.helper-panel summary {
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.helper-panel summary::-webkit-details-marker {
    display: none;
}

.helper-content {
    margin-top: 0.8rem;
    color: var(--muted);
}

.helper-content h3 {
    margin: 0.7rem 0 0.35rem;
    color: var(--text);
    font-size: 1rem;
}

.helper-content p,
.helper-content ul {
    margin: 0 0 0.45rem;
}

.table-shell {
    width: 100%;
    overflow-x: auto;
}

#expenseTable {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

#expenseTable th,
#expenseTable td {
    border-bottom: 1px solid var(--border);
    padding: 0.65rem;
    vertical-align: middle;
}

#expenseTable th {
    text-align: left;
    font-size: 0.88rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    background: var(--surface-2);
}

#expenseTable input[type="text"],
#expenseTable input[type="number"],
#expenseTable select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    padding: 0.55rem 0.6rem;
    font: inherit;
}

#expenseTable input.input-invalid {
    border-color: #c63d2f;
    background: color-mix(in srgb, #c63d2f 10%, var(--surface));
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    padding: 0.9rem;
}

.btn {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.58rem 0.95rem;
    color: var(--text);
    cursor: pointer;
    font-family: "Space Grotesk", "Outfit", sans-serif;
    font-weight: 700;
    font-size: 0.88rem;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    transition: transform 0.15s ease, filter 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    filter: none;
    border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
}

.btn-primary {
    background: color-mix(in srgb, var(--primary) var(--btn-tint-strength), var(--surface));
}

.btn-secondary {
    background: color-mix(in srgb, #2f855a var(--btn-tint-strength), var(--surface));
}

.btn-success {
    background: color-mix(in srgb, #0f9960 var(--btn-tint-strength), var(--surface));
}

.btn-reset,
.btn-danger {
    background: color-mix(in srgb, #cc3f32 var(--btn-tint-strength), var(--surface));
}

.rowdelete {
    width: 2.1rem;
    height: 2.1rem;
    padding: 0;
    border-radius: 7px;
    font-size: 0.78rem;
    justify-content: center;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
    align-items: start;
}

.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    box-shadow: var(--shadow);
}

.result-card h2 {
    margin: 0.2rem 0 0.7rem;
    font-family: "Space Grotesk", "Outfit", sans-serif;
    font-size: 1.14rem;
}

.result-card ul {
    margin: 0;
    padding-left: 1.2rem;
}

@media (max-width: 900px) {
}

@media (max-width: 640px) {
    .action-row {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }
}