:root {
    --primary-color: #0f766e;
    --primary-hover: #115e59;
    --secondary-color: #64748b;
    --bg-color: #f5f7f4;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.10), transparent 28%),
        linear-gradient(180deg, #fcfdfb 0%, var(--bg-color) 100%);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
}

.calculator-card {
    background: var(--card-bg);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 24px 60px -32px rgba(15, 23, 42, 0.28);
    margin-bottom: 2rem;
    border: 1px solid rgba(15, 118, 110, 0.08);
}

h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-color);
}

.intro-section {
    background: linear-gradient(135deg, #ecfeff 0%, #f8fafc 100%);
    border: 1px solid #bfdbfe;
    border-radius: 1.25rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.intro-section h2 {
    font-size: 1.5rem;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.intro-section p {
    color: var(--text-muted);
    max-width: 56ch;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    background: rgba(15, 118, 110, 0.10);
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.grid-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

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

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-main);
}

.helper-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.legal-helper {
    margin-top: 1rem;
}

.input-group input[type="time"],
.input-group input[type="number"],
.input-group input[type="month"],
.input-group input[type="date"],
.input-group input[type="text"] {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.2s;
    background: white;
}

.input-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.flags-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.flag-option {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1rem 1.1rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    background: #fff;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.flag-option input[type="checkbox"] {
    width: 1.05rem;
    height: 1.05rem;
    margin-top: 0.15rem;
    accent-color: var(--primary-color);
    flex: 0 0 auto;
}

.flag-option strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.flag-option span {
    display: block;
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.4;
}

.flag-option-highlight {
    background: linear-gradient(180deg, #f8fafc 0%, #eefbf8 100%);
    border-color: rgba(16, 185, 129, 0.35);
}

.flag-option.is-active {
    border-color: var(--primary-color);
    box-shadow: 0 12px 24px -22px rgba(15, 118, 110, 0.7);
    background: #f8fffe;
}

.month-selector {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.action-bar {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1rem 1.25rem;
}

.action-copy strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.action-copy span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

.days-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
    padding: 1.25rem 1.5rem;
    border-radius: 1rem 1rem 0 0;
    border: 1px solid var(--border-color);
    font-weight: 700;
    color: var(--text-main);
}

.days-panel-header span {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.days-panel-header small {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
}

.table-responsive-open {
    border-top: none;
    border-radius: 0 0 1rem 1rem;
}

.table-responsive {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 1rem 1rem;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 780px;
    background: white;
}

th {
    background: #f8fafc;
    text-align: left;
    padding: 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.day-row input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
}

.day-row.is-weekend {
    background: #fcfcfd;
}

.day-row.is-holiday {
    background: #fffbeb;
}

.day-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.day-name {
    font-weight: 600;
}

.holiday-label {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    background: #fef3c7;
    color: #92400e;
    font-size: 0.75rem;
    font-weight: 700;
}

.daily-amount {
    display: inline-block;
    min-width: 92px;
    padding: 0.5rem 0.7rem;
    border-radius: 0.75rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    background: #ecfeff;
    color: #155e75;
    border: 1px solid #bae6fd;
}

.daily-amount.filled {
    background: #ecfeff;
    color: #155e75;
    border-color: #bae6fd;
}

.daily-amount.bank {
    background: #eef2ff;
    color: #4338ca;
    border-color: #c7d2fe;
}

.daily-amount.holiday {
    background: #fef3c7;
    color: #92400e;
    border-color: #fcd34d;
}

.daily-amount.empty {
    background: #f8fafc;
    color: #94a3b8;
    border-color: #e2e8f0;
}

.btn-clear {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #334155;
    cursor: pointer;
    min-width: 72px;
    height: 36px;
    padding: 0 0.85rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-clear:hover {
    background: #e2e8f0;
    border-color: #94a3b8;
}

.summary-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.result-card {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    padding: 1.75rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s;
    box-shadow: 0 12px 30px -28px rgba(15, 23, 42, 0.5);
}

.result-card.highlight {
    background: linear-gradient(135deg, #ecfeff 0%, #eff6ff 100%);
    border-color: var(--primary-color);
    border-width: 2px;
}

.result-card .label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.result-card .value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
}

.result-card.highlight .value {
    color: var(--primary-color);
}

.result-card-wide {
    grid-column: 1 / -1;
}

.result-card-wide .value {
    font-size: 2.4rem;
}

.calculation-memory {
    background: #0f172a;
    color: #f8fafc;
    padding: 2rem;
    border-radius: 1.25rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.memory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.memory-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.calculation-memory h4 {
    color: #38bdf8;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-export-memory {
    background: #38bdf8;
    color: #082f49;
    border: none;
    border-radius: 0.75rem;
    padding: 0.7rem 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, filter 0.2s;
}

.btn-export-memory:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
}

.btn-export-memory-secondary {
    background: #1e293b;
    color: #e2e8f0;
    border: 1px solid #475569;
}

.memory-content {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    line-height: 1.7;
}

.memory-line {
    border-bottom: 1px solid #1e293b;
    padding: 0.75rem 0;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.memory-line:last-child {
    border-bottom: none;
}

.memory-divider {
    margin-top: 1rem;
    color: #38bdf8;
    border-bottom: 2px solid #38bdf8;
    padding-bottom: 0.35rem;
}

.memory-note span:first-child {
    color: #cbd5e1;
}

.memory-total {
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid #38bdf8;
    font-size: 1rem;
}

.memory-total span:last-child {
    color: #38bdf8;
}

.memory-line span:last-child {
    font-weight: 700;
    color: #f1f5f9;
}

footer .seo-article {
    background: white;
    padding: 3rem;
    border-radius: 1.25rem;
    margin-top: 4rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.seo-article h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.seo-article h3 {
    font-size: 1.25rem;
    margin: 2rem 0 1rem;
}

.seo-article p {
    color: #475569;
    margin-bottom: 1.25rem;
}

.copyright {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-bottom: 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .calculator-card {
        padding: 1.25rem;
    }

    .grid-inputs {
        grid-template-columns: 1fr 1fr;
    }

    .month-selector {
        flex-direction: column;
        align-items: stretch;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .flags-panel {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .grid-inputs {
        grid-template-columns: 1fr;
    }

    .days-panel-header span {
        font-size: 0.875rem;
    }

    .intro-section h2 {
        font-size: 1.3rem;
    }

    .btn-clear {
        min-width: 64px;
    }
}