/**
 * WooCommerce Square Meter Calculator - Frontend Styles
 *
 * Uses CSS custom properties (variables) for theming.
 * Override these in your theme to customize colors.
 */

/* ============================================
   CSS Custom Properties (Color Variables)
   ============================================ */
.wsmc-calculator {
    --wsmc-base: #F8F7F5;
    --wsmc-primary: #2A403A;
    --wsmc-secondary: #5D4037;
    --wsmc-accent: #D97D54;

    /* Derived colors */
    --wsmc-accent-hover: #c56a43;
    --wsmc-border: #e0e0e0;
    --wsmc-input-bg: #ffffff;
    --wsmc-unit-bg: #f0f0f0;
    --wsmc-error-bg: #fff0f0;
    --wsmc-error-border: #ffcdd2;
    --wsmc-error-text: #c62828;
}

/* ============================================
   Accessibility
   ============================================ */
.wsmc-calculator .screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Calculator Container
   ============================================ */
.wsmc-calculator {
    background-color: var(--wsmc-base);
    border-radius: 8px;
    padding: 24px;
    max-width: 400px;
    font-family: inherit;
    box-sizing: border-box;
}

.wsmc-calculator *,
.wsmc-calculator *::before,
.wsmc-calculator *::after {
    box-sizing: border-box;
}

/* ============================================
   Header
   ============================================ */
.wsmc-calculator__header {
    margin-bottom: 20px;
    text-align: center;
}

.wsmc-calculator__title {
    color: var(--wsmc-primary);
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.wsmc-calculator__subtitle {
    color: var(--wsmc-secondary);
    font-size: 14px;
    margin: 0;
    opacity: 0.85;
    line-height: 1.4;
}

/* ============================================
   Body / Form
   ============================================ */
.wsmc-calculator__body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ============================================
   Input Group
   ============================================ */
.wsmc-calculator__input-group {
    display: flex;
    align-items: center;
    background: var(--wsmc-input-bg);
    border: 2px solid var(--wsmc-border);
    border-radius: 6px;
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.wsmc-calculator__input-group:focus-within {
    border-color: var(--wsmc-primary);
}

.wsmc-calculator__input {
    flex: 1;
    border: none;
    padding: 14px 16px;
    font-size: 16px;
    color: var(--wsmc-primary);
    background: transparent;
    outline: none;
    min-width: 0;
    width: 100%;
}

.wsmc-calculator__input::placeholder {
    color: #999;
    opacity: 1;
}

.wsmc-calculator__input:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
    color: #999;
}

.wsmc-calculator__unit {
    padding: 14px 16px;
    background: var(--wsmc-unit-bg);
    color: var(--wsmc-secondary);
    font-weight: 500;
    font-size: 14px;
    flex-shrink: 0;
}

/* ============================================
   Calculate Button
   ============================================ */
.wsmc-calculator__button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    background-color: var(--wsmc-accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    line-height: 1;
}

.wsmc-calculator__button:hover:not(:disabled) {
    background-color: var(--wsmc-accent-hover);
}

.wsmc-calculator__button:focus {
    outline: 2px solid var(--wsmc-primary);
    outline-offset: 2px;
}

.wsmc-calculator__button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.wsmc-calculator__button-text {
    display: inline;
}

.wsmc-calculator__spinner {
    display: none;
    line-height: 0;
}

.wsmc-calculator__spinner svg {
    animation: wsmc-spin 1s linear infinite;
}

/* Loading state */
.wsmc-calculator__button--loading .wsmc-calculator__button-text {
    display: none;
}

.wsmc-calculator__button--loading .wsmc-calculator__spinner {
    display: inline-block;
}

@keyframes wsmc-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   Variation Notice
   ============================================ */
.wsmc-calculator__notice {
    text-align: center;
    color: var(--wsmc-secondary);
    font-size: 14px;
    font-style: italic;
    margin: 0;
    padding: 8px 12px;
    background: rgba(93, 64, 55, 0.1);
    border-radius: 4px;
    line-height: 1.4;
}

.wsmc-calculator__notice--hidden {
    display: none;
}

/* ============================================
   Result Display
   ============================================ */
.wsmc-calculator__result {
    display: none;
    text-align: center;
    padding: 16px;
    background: rgba(42, 64, 58, 0.08);
    border-radius: 6px;
}

.wsmc-calculator__result--visible {
    display: block;
}

.wsmc-calculator__result-label {
    display: block;
    color: var(--wsmc-secondary);
    font-size: 14px;
    margin-bottom: 4px;
    line-height: 1.4;
}

.wsmc-calculator__result-value {
    display: block;
    color: var(--wsmc-primary);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.2;
}

/* ============================================
   Error Display
   ============================================ */
.wsmc-calculator__error {
    display: none;
    text-align: center;
    padding: 12px;
    background: var(--wsmc-error-bg);
    border: 1px solid var(--wsmc-error-border);
    border-radius: 6px;
    color: var(--wsmc-error-text);
    font-size: 14px;
    line-height: 1.4;
}

.wsmc-calculator__error--visible {
    display: block;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 480px) {
    .wsmc-calculator {
        padding: 16px;
        border-radius: 6px;
    }

    .wsmc-calculator__title {
        font-size: 16px;
    }

    .wsmc-calculator__subtitle {
        font-size: 13px;
    }

    .wsmc-calculator__input,
    .wsmc-calculator__unit {
        padding: 12px;
    }

    .wsmc-calculator__button {
        padding: 12px 20px;
    }

    .wsmc-calculator__result-value {
        font-size: 20px;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .wsmc-calculator {
        border: 1px solid #ccc;
        box-shadow: none;
    }

    .wsmc-calculator__button {
        display: none;
    }
}