:root,
[data-theme="dark"] {
    --bg: #0b0f1a;
    --bg-card: rgba(22, 28, 45, 0.72);
    --border: rgba(255, 255, 255, 0.08);
    --text: #f3f6ff;
    --text-muted: #9aa6c3;
    --accent: #6c8cff;
    --accent-2: #9b6dff;
    --success: #3dd68c;
    --danger: #ff6b8a;
    --warning: #ffb347;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    --radius: 16px;
    --btn-bg: rgba(255, 255, 255, 0.04);
    --btn-hover-bg: rgba(108, 140, 255, 0.12);
    --input-bg: rgba(255, 255, 255, 0.04);
    --chart-legend: #d7def3;
    --chart-tick: #9aa6c3;
    --chart-grid: rgba(255, 255, 255, 0.05);
    --banner-bg: rgba(255, 179, 71, 0.12);
    --banner-text: #ffd9a0;
    --skeleton: rgba(255, 255, 255, 0.06);
    --skeleton-highlight: rgba(255, 255, 255, 0.12);
}

[data-theme="light"] {
    --bg: #eef2f9;
    --bg-card: rgba(255, 255, 255, 0.94);
    --border: rgba(15, 23, 42, 0.1);
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #4f6ef7;
    --accent-2: #7c4dff;
    --success: #16a34a;
    --danger: #e11d48;
    --warning: #d97706;
    --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
    --btn-bg: rgba(15, 23, 42, 0.04);
    --btn-hover-bg: rgba(79, 110, 247, 0.1);
    --input-bg: rgba(255, 255, 255, 0.95);
    --chart-legend: #334155;
    --chart-tick: #64748b;
    --chart-grid: rgba(15, 23, 42, 0.08);
    --banner-bg: rgba(217, 119, 6, 0.12);
    --banner-text: #92400e;
    --skeleton: rgba(15, 23, 42, 0.06);
    --skeleton-highlight: rgba(15, 23, 42, 0.1);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, system-ui, -apple-system, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 10% 10%, rgba(108, 140, 255, 0.18), transparent 30%),
        radial-gradient(circle at 90% 0%, rgba(155, 109, 255, 0.15), transparent 28%),
        var(--bg);
}

[data-theme="light"] body {
    background:
        radial-gradient(circle at 10% 10%, rgba(79, 110, 247, 0.12), transparent 32%),
        radial-gradient(circle at 90% 0%, rgba(124, 77, 255, 0.08), transparent 28%),
        var(--bg);
}

.app {
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
    flex-wrap: nowrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.brand__logo {
    min-width: 48px;
    height: 48px;
    padding: 0 10px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: var(--shadow);
}

.brand h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.brand__sub {
    margin: 4px 0 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.header__controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    flex: 1;
    min-width: 0;
    flex-wrap: wrap;
}

.sync-label {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
    white-space: nowrap;
}

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

.preset-btn,
.btn {
    border: 1px solid var(--border);
    background: var(--btn-bg);
    color: var(--text);
    border-radius: 12px;
    padding: 10px 14px;
    cursor: pointer;
    font: inherit;
    transition: 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn--ghost {
    background: transparent;
}

.btn--primary {
    border-color: var(--accent);
    background: rgba(108, 140, 255, 0.22);
    width: 100%;
}

.preset-btn:hover,
.btn:hover {
    border-color: rgba(108, 140, 255, 0.5);
    background: var(--btn-hover-bg);
}

.btn--icon {
    width: 42px;
    height: 42px;
    padding: 0;
}

.theme-toggle__icon {
    display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun,
[data-theme="light"] .theme-toggle__icon--moon {
    display: block;
}

.preset-btn.is-active {
    border-color: var(--accent);
    background: rgba(108, 140, 255, 0.18);
}

.date-input {
    min-width: 240px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    border-radius: 12px;
    padding: 10px 14px;
    font: inherit;
}

.banner {
    margin-bottom: 20px;
    padding: 14px 18px;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 179, 71, 0.35);
    background: var(--banner-bg);
    color: var(--banner-text);
}

.banner--hidden {
    display: none;
}

.section {
    margin-bottom: 32px;
}

.section__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.section__title {
    margin: 0 0 16px;
    font-size: 1.125rem;
    font-weight: 600;
}

.section__head .section__title {
    margin-bottom: 0;
}

.grid {
    display: grid;
    gap: 16px;
}

.grid--6 {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.grid--5 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
    position: relative;
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    opacity: 0.7;
}

.card__label {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card__value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.1;
}

.card__badge {
    position: absolute;
    top: 14px;
    right: 14px;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(61, 214, 140, 0.15);
    color: var(--success);
    border: 1px solid rgba(61, 214, 140, 0.35);
}

.card.skeleton .card__value {
    color: transparent;
    background: linear-gradient(90deg, var(--skeleton), var(--skeleton-highlight), var(--skeleton));
    background-size: 200% 100%;
    animation: shimmer 1.2s infinite;
    border-radius: 8px;
    min-height: 28px;
}

.card--error {
    border-color: rgba(255, 107, 138, 0.35);
}

.card__value--error {
    font-size: 0.95rem !important;
    line-height: 1.4;
    font-weight: 500 !important;
}

.btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.loss-reasons {
    margin-top: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    overflow: hidden;
}

.loss-reasons__title {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.loss-reasons__row {
    display: flex;
    justify-content: space-between;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border);
}

.loss-reasons__row:last-child {
    border-bottom: none;
}

.metric-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.metric-picker label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--btn-bg);
    font-size: 0.8125rem;
    cursor: pointer;
}

.metric-picker input {
    accent-color: var(--accent);
}

.chart-wrap {
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    min-height: 360px;
}

@media (max-width: 768px) {
    .app {
        padding: 16px;
    }

    .header {
        flex-wrap: wrap;
    }

    .header__controls {
        width: 100%;
        justify-content: flex-start;
    }

    .card__value {
        font-size: 1.6rem;
    }
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 32px 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    box-shadow: var(--shadow);
}

.login-card__logo {
    margin-bottom: 16px;
}

.login-card__title {
    margin: 0 0 8px;
    font-size: 1.5rem;
}

.login-card__sub {
    margin: 0 0 24px;
    color: var(--text-muted);
}

.login-card__error {
    margin-bottom: 16px;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 107, 138, 0.35);
    background: rgba(255, 107, 138, 0.12);
    color: #ffb3c1;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-form__field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.login-form__field input {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border-radius: 12px;
    padding: 12px 14px;
    font: inherit;
}

.login-form__field input:focus {
    outline: none;
    border-color: rgba(108, 140, 255, 0.55);
}

.login-form__submit {
    margin-top: 8px;
}