/**
 * Hashtpa Ads Calculator Frontend Stylesheet
 *
 * Implements isolated, responsive, and modern dark-navy styling for [hashtpa_calculator] shortcode.
 *
 * @package HashtpaAdsCalculator
 * @version 1.0.0
 * @author  AI Assistant (AGENT-08-CODER)
 * @license GPL-2.0-or-later
 */

:root {
    --hashtpa-bg-navy: #0d1b3e;
    --hashtpa-card-bg: #ffffff;
    --hashtpa-accent-blue: #0d6efd;
    --hashtpa-accent-blue-hover: #0b5ed7;
    --hashtpa-accent-red: #dc3545;
    --hashtpa-text-dark: #1e293b;
    --hashtpa-text-muted: #64748b;
    --hashtpa-border-color: #e2e8f0;
    --hashtpa-bg-light: #f8fafc;
}

.hashtpa-calc-container {
    direction: rtl;
    text-align: right;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2.5rem 1.5rem;
    background-color: var(--hashtpa-bg-navy);
    border-radius: 1.5rem;
    color: var(--hashtpa-text-dark);
    font-family: inherit;
    box-shadow: 0 10px 30px rgba(13, 27, 62, 0.15);
}

.hashtpa-calc-container *,
.hashtpa-calc-container *::before,
.hashtpa-calc-container *::after {
    box-sizing: border-box;
}

.hashtpa-calc-inner {
    width: 100%;
}

.tabular-nums {
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Currency Tabs (Pills)
   ========================================================================== */
.hashtpa-calc-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.hashtpa-calc-container .hashtpa-calc-tabs button.hashtpa-calc-tab {
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 9999px;
    padding: 0.65rem 1.75rem;
    color: #94a3b8 !important;
    background: rgba(15, 23, 42, 0.65) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.16) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.25s ease-in-out;
    outline: none;
    user-select: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-shadow: none;
    line-height: 1.4;
}

.hashtpa-calc-container .hashtpa-calc-tabs button.hashtpa-calc-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.12) !important;
    border-color: rgba(255, 255, 255, 0.35) !important;
    color: #f8fafc !important;
    transform: translateY(-2px);
}

.hashtpa-calc-container .hashtpa-calc-tabs button.hashtpa-calc-tab.active,
.hashtpa-calc-container .hashtpa-calc-tabs button.hashtpa-calc-tab[aria-selected="true"] {
    background: linear-gradient(135deg, #0d6efd 0%, #0052cc 100%) !important;
    color: #ffffff !important;
    border-color: #38bdf8 !important;
    box-shadow: 0 4px 18px rgba(13, 110, 253, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.25) !important;
    font-weight: 800;
    transform: translateY(-2px) scale(1.02);
}

/* ==========================================================================
   Rate Banner
   ========================================================================== */
.hashtpa-calc-rate-banner {
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 1rem 1.5rem;
    margin-bottom: 2.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: #f1f5f9;
}

.hashtpa-calc-rate-banner .hashtpa-rate-highlight {
    color: #38bdf8;
    margin-right: 0.5rem;
}

.hashtpa-calc-rate-banner.hashtpa-rate-error {
    background: rgba(220, 53, 69, 0.15);
    border-color: rgba(220, 53, 69, 0.3);
    color: #fca5a5;
}

/* ==========================================================================
   Packages Grid (3-column desktop, 2-column tablet, 1-column mobile)
   ========================================================================== */
.hashtpa-calc-grid-section {
    margin-bottom: 3rem;
}

.hashtpa-calc-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.hashtpa-calc-card {
    background: var(--hashtpa-card-bg);
    border-radius: 1.25rem;
    padding: 2rem 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--hashtpa-border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.hashtpa-calc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    border-color: var(--hashtpa-accent-blue);
}

.hashtpa-calc-card-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--hashtpa-accent-blue);
    margin: 0 0 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--hashtpa-border-color);
    text-align: center;
}

.hashtpa-calc-card-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.hashtpa-calc-card-detail-label {
    color: var(--hashtpa-text-muted);
    font-weight: 600;
}

.hashtpa-calc-card-detail-value {
    color: var(--hashtpa-text-dark);
    font-weight: 700;
}

.hashtpa-calc-card-price {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--hashtpa-border-color);
    text-align: center;
}

.hashtpa-calc-card-price-label {
    color: var(--hashtpa-text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.hashtpa-calc-card-price-value {
    color: var(--hashtpa-accent-blue);
    font-size: 1.6rem;
    font-weight: 900;
}

.hashtpa-calc-card-price-unit {
    font-size: 0.9rem;
    color: var(--hashtpa-text-muted);
    margin-right: 0.25rem;
}

.hashtpa-calc-card-btn {
    display: block;
    width: 100%;
    margin-top: 1.25rem;
    padding: 0.85rem 1rem;
    background-color: var(--hashtpa-accent-blue);
    color: #ffffff !important;
    text-decoration: none;
    text-align: center;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 0.75rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.15s ease;
}

.hashtpa-calc-card-btn:hover {
    background-color: var(--hashtpa-accent-blue-hover);
    transform: translateY(-2px);
}

.hashtpa-calc-empty-grid {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1rem;
    color: #94a3b8;
    font-weight: 600;
    font-size: 1.1rem;
}

/* ==========================================================================
   Interactive Custom Calculation Section
   ========================================================================== */
.hashtpa-calc-custom {
    background: #ffffff;
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.hashtpa-calc-custom-header {
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--hashtpa-border-color);
    padding-bottom: 1rem;
}

.hashtpa-calc-custom-title {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--hashtpa-text-dark);
}

.hashtpa-calc-custom-body {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2.5rem;
    align-items: start;
}

.hashtpa-calc-field-group {
    margin-bottom: 1.75rem;
}

.hashtpa-calc-label {
    display: block;
    font-weight: 700;
    color: var(--hashtpa-text-dark);
    margin-bottom: 0.65rem;
    font-size: 1rem;
}

.hashtpa-calc-input-wrapper {
    display: flex;
    align-items: center;
    border: 2px solid var(--hashtpa-border-color);
    border-radius: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: #ffffff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.hashtpa-calc-input-wrapper:focus-within {
    border-color: var(--hashtpa-accent-blue);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.hashtpa-calc-input {
    width: 100%;
    border: none;
    outline: none;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--hashtpa-text-dark);
    background: transparent;
    font-family: inherit;
    text-align: right;
    direction: ltr;
}

.hashtpa-calc-unit {
    margin-right: 0.75rem;
    font-weight: 700;
    color: var(--hashtpa-text-muted);
    font-size: 1rem;
    white-space: nowrap;
}

/* ==========================================================================
   Range Slider
   ========================================================================== */
.hashtpa-calc-slider-wrapper {
    margin-bottom: 2rem;
    padding: 0 0.25rem;
}

.hashtpa-calc-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 6px;
    background: #cbd5e1;
    outline: none;
    cursor: pointer;
    margin: 0.5rem 0;
    transition: background 0.2s ease;
}

.hashtpa-calc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--hashtpa-accent-blue);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.4);
    transition: transform 0.15s ease, background-color 0.15s ease;
}

.hashtpa-calc-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    background: var(--hashtpa-accent-blue-hover);
}

.hashtpa-calc-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--hashtpa-accent-blue);
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.4);
    transition: transform 0.15s ease, background-color 0.15s ease;
}

.hashtpa-calc-slider::-moz-range-thumb:hover {
    transform: scale(1.15);
    background: var(--hashtpa-accent-blue-hover);
}

.hashtpa-calc-slider-labels {
    display: flex;
    justify-content: space-between;
    color: var(--hashtpa-text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    direction: ltr;
}

/* ==========================================================================
   Financial Breakdown Summary Box
   ========================================================================== */
.hashtpa-calc-summary {
    background: var(--hashtpa-bg-light);
    border: 1px solid var(--hashtpa-border-color);
    border-radius: 1.25rem;
    padding: 2rem 1.5rem;
}

.hashtpa-calc-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--hashtpa-border-color);
    font-size: 1rem;
}

.hashtpa-calc-summary-label {
    color: var(--hashtpa-text-muted);
    font-weight: 600;
}

.hashtpa-calc-summary-value {
    color: var(--hashtpa-text-dark);
    font-weight: 700;
}

.hashtpa-calc-total-box {
    margin-top: 1.5rem;
    padding-top: 1rem;
    text-align: center;
}

.hashtpa-calc-total-label {
    display: block;
    color: var(--hashtpa-text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hashtpa-calc-total-val {
    color: var(--hashtpa-accent-blue);
    font-size: 2.25rem;
    font-weight: 900;
    line-height: 1.2;
}

.hashtpa-calc-total-unit {
    display: block;
    font-size: 0.95rem;
    color: var(--hashtpa-text-muted);
    font-weight: 600;
    margin-top: 0.25rem;
}

.hashtpa-calc-btn {
    display: block;
    width: 100%;
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    background-color: var(--hashtpa-accent-blue);
    color: #ffffff !important;
    text-decoration: none;
    text-align: center;
    font-weight: 800;
    font-size: 1.1rem;
    border-radius: 0.85rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
    transition: background-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.hashtpa-calc-btn:hover {
    background-color: var(--hashtpa-accent-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(13, 110, 253, 0.4);
}

.hashtpa-calc-btn.disabled,
.hashtpa-calc-card-btn.disabled {
    opacity: 0.5;
    pointer-events: none;
    background-color: #94a3b8;
    box-shadow: none;
    cursor: not-allowed;
}

.hashtpa-calc-notice {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    background-color: #fef2f2;
    color: var(--hashtpa-accent-red);
    border: 1px solid #fecaca;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 991px) {
    .hashtpa-calc-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hashtpa-calc-custom-body {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 767px) {
    .hashtpa-calc-container {
        padding: 1.5rem 1rem;
        margin: 1rem auto;
        border-radius: 1rem;
    }

    .hashtpa-calc-grid {
        grid-template-columns: 1fr;
    }

    .hashtpa-calc-tab {
        padding: 0.5rem 1.25rem;
        font-size: 0.95rem;
    }

    .hashtpa-calc-custom {
        padding: 1.5rem 1rem;
    }

    .hashtpa-calc-total-val {
        font-size: 1.85rem;
    }
}