:root {
    --sm-dark-blue: #0B2545;
    --sm-light-blue: #00B4D8;
    --sm-white: #FFFFFF;
    --sm-border: #D8E2EC;
    --sm-border-soft: #EAF0F5;
    --sm-text: #0B2545;
    --sm-muted: #6E8094;
    --sm-hover: #EDF9FD;
    --sm-shadow: 0 14px 32px rgba(11, 37, 69, 0.18);
    --sm-radius: 14px;
}

.sm-date-picker {
    position: relative;
    display: inline-block;
    z-index: 100;
}

.sm-date-trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 14px;
    border: 1px solid var(--sm-border);
    border-radius: 10px;
    background: var(--sm-white);
    color: var(--sm-dark-blue);
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(11, 37, 69, 0.05);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.sm-date-trigger:hover,
.sm-date-trigger:focus {
    border-color: var(--sm-light-blue);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.12);
    outline: none;
}

.sm-date-trigger-caret {
    font-size: 12px;
    color: var(--sm-dark-blue);
}

.sm-date-popup {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    width: 340px;
    background: var(--sm-white);
    border: 1px solid var(--sm-border);
    border-radius: var(--sm-radius);
    box-shadow: var(--sm-shadow);
    padding: 14px;
}

.sm-date-header {
    display: grid;
    grid-template-columns: 40px 1fr 40px;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.sm-date-controls {
    display: grid;
    grid-template-columns: 1fr 110px;
    gap: 8px;
    align-items: center;
}

.sm-date-select {
    width: 100%;
    height: 40px;
    border: 1px solid var(--sm-border);
    border-radius: 10px;
    background: var(--sm-white);
    color: var(--sm-dark-blue);
    font-size: 15px;
    font-weight: 700;
    padding: 0 12px;
    cursor: pointer;
    outline: none;
}

.sm-date-select:focus {
    border-color: var(--sm-light-blue);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.12);
}

.sm-date-nav {
    width: 40px;
    height: 40px;
    border: 1px solid var(--sm-border);
    border-radius: 10px;
    background: var(--sm-white);
    color: var(--sm-light-blue);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sm-date-nav:hover,
.sm-date-nav:focus {
    background: var(--sm-hover);
    border-color: var(--sm-light-blue);
    color: var(--sm-dark-blue);
    outline: none;
}

.sm-date-nav.is-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.sm-date-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    margin-bottom: 6px;
}

.sm-date-weekdays div {
    text-align: center;
    font-size: 12px;
    font-weight: 800;
    color: var(--sm-muted);
    padding: 6px 0;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.sm-date-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    border-top: 1px solid var(--sm-border-soft);
    border-left: 1px solid var(--sm-border-soft);
}

.sm-date-day {
    height: 44px;
    border-right: 1px solid var(--sm-border-soft);
    border-bottom: 1px solid var(--sm-border-soft);
    background: var(--sm-white);
    color: var(--sm-dark-blue);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transition: background 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
}

.sm-date-day:hover {
    background: var(--sm-hover);
}

.sm-date-day.is-other-month {
    color: #B8C3CF;
}

.sm-date-day.is-today {
    box-shadow: inset 0 0 0 2px var(--sm-light-blue);
}

.sm-date-day.is-selected {
    background: var(--sm-light-blue);
    color: var(--sm-white);
    box-shadow: inset 0 0 0 2px var(--sm-dark-blue);
}

.sm-date-day.is-disabled {
    color: #D1D9E2;
    background: #FAFCFE;
    cursor: not-allowed;
}

.sm-date-day.is-disabled:hover {
    background: #FAFCFE;
}

.sm-date-footer {
    display: flex;
    justify-content: center;
    padding-top: 14px;
}

.sm-date-footer-btn {
    min-width: 110px;
    height: 36px;
    border: 1px solid var(--sm-light-blue);
    border-radius: 10px;
    background: var(--sm-light-blue);
    color: var(--sm-white);
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.sm-date-footer-btn:hover,
.sm-date-footer-btn:focus {
    background: var(--sm-dark-blue);
    border-color: var(--sm-dark-blue);
    outline: none;
}

@media (max-width: 640px) {
    .sm-date-popup {
        width: 320px;
        max-width: calc(100vw - 24px);
    }

    .sm-date-controls {
        grid-template-columns: 1fr 96px;
    }
}