:root {
    --bg: linear-gradient(140deg, #f4f7fb 0%, #ecf3f2 48%, #e9eef8 100%);
    --card: #ffffff;
    --ink: #132238;
    --muted: #4f6076;
    --primary: #0f5c5e;
    --primary-hover: #0b4a4c;
    --danger: #9f2e2e;
    --border: #d4dde7;
    --success-bg: #eaf8ef;
    --success-ink: #216a3d;
    --error-bg: #fdecec;
    --error-ink: #8b1f1f;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.7)), url('/images/cover.jpg');
    background-size: 100% auto;
    background-repeat: repeat-y;
    background-position: top center;
    color: var(--ink);
    font-family: "Source Sans 3", "Trebuchet MS", sans-serif;
}

.page {
    max-width: 1500px;
    margin: 0 auto;
    padding: 2rem 1rem 4rem;
}

.hero {
    margin-bottom: 1rem;
}

h1, h2 {
    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
    margin: 0 0 0.8rem;
}

p {
    color: var(--muted);
}

.card {
    background: rgba(255, 255, 255, 0.84);
    backdrop-filter: blur(1.5px);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.2rem;
    margin-bottom: 1rem;
    box-shadow: 0 8px 30px rgba(20, 35, 52, 0.06);
}

.inline-form {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    align-items: center;
}

.grid {
    display: grid;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

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

label {
    display: flex;
    flex-direction: column;
    font-size: 0.95rem;
    gap: 0.3rem;
}

input, select, button, textarea {
    font: inherit;
}

input, select, textarea {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.52rem 0.6rem;
    background: #fff;
}

textarea {
    resize: vertical;
    min-height: 88px;
}

button {
    border: none;
    border-radius: 10px;
    padding: 0.55rem 0.85rem;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
}

button:hover {
    background: var(--primary-hover);
}

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

button.primary {
    margin-top: 0.8rem;
    font-weight: 700;
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    width: 100%;
    min-width: 720px;
}

th, td {
    border: 1px solid var(--border);
    padding: 0.5rem;
}

th {
    text-align: left;
    background: #eff4f9;
}

.actions-cell {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.option-block {
    margin-top: 0.9rem;
    margin-bottom: 0.9rem;
}

.check-label {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.period-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.period-inputs input {
    flex: 1;
}

.locked-vat {
    background: #f0f4f8;
}

.formats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.totals {
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 0.6rem 0.8rem;
    margin: 1rem 0;
}

.alert {
    margin: 0;
    padding: 0.7rem;
    border-radius: 8px;
}

.alert.error {
    color: var(--error-ink);
    background: var(--error-bg);
}

.alert.success {
    color: var(--success-ink);
    background: var(--success-bg);
}

.errors {
    color: var(--error-ink);
}

@media (max-width: 820px) {
    .grid.two {
        grid-template-columns: 1fr;
    }

    .period-inputs {
        flex-direction: column;
        align-items: stretch;
    }
}