/*
 * calculator.css — Shared styles for all calculator pages
 * (TDEE, BMI, TEF, and future calculators)
 *
 * Extracted from inline CSS in:
 *   deploy/tdee-calculator.php
 *   deploy/bmi-calculator.php
 *   deploy/tef-calculator.php
 *
 * Page-specific overrides live in pages/tdee.css, pages/bmi.css, pages/tef.css
 */

/* =============================================
   HERO SECTION
   ============================================= */

.calc-hero {
    padding-top: calc(80px + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    background: var(--gradient-hero);
    min-height: auto;
}
.calc-hero .container {
    max-width: 800px;
}
.calc-hero-title {
    font-size: var(--text-h1);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}
.calc-hero-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--text-body-lg);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* =============================================
   FORM CARD
   ============================================= */

.calc-form-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

/* =============================================
   GENDER TOGGLE (TDEE + BMI)
   ============================================= */

.calc-gender {
    display: flex;
    gap: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
}
.calc-gender-btn {
    flex: 1;
    padding: 14px;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--text-body);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-primary);
}
.calc-gender-btn.active {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
}
.calc-gender-btn:not(.active):hover {
    background: var(--color-bg-card-hover);
    color: var(--color-text-primary);
}

/* =============================================
   FORM GRID
   ============================================= */

.calc-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

/* =============================================
   INPUT GROUPS
   ============================================= */

.calc-input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.calc-input-group label {
    font-size: var(--text-small);
    font-weight: 600;
    color: var(--color-text-secondary);
}
.calc-input-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
}
.calc-input-row input {
    flex: 1;
    min-width: 0;
}
.calc-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: var(--text-body);
    font-family: var(--font-primary);
    transition: border-color var(--transition-fast);
    -moz-appearance: textfield;
}
.calc-input::-webkit-outer-spin-button,
.calc-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.calc-input:focus {
    outline: none;
    border-color: var(--color-accent-green);
}
.calc-input::placeholder {
    color: var(--color-text-tertiary);
}

/* =============================================
   UNIT TOGGLE (TDEE + BMI)
   ============================================= */

.calc-unit-toggle {
    display: flex;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--color-border);
    flex-shrink: 0;
}
.calc-unit-btn {
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    font-size: var(--text-caption);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-primary);
}
.calc-unit-btn.active {
    background: var(--color-accent-green);
    color: var(--color-text-primary);
}

/* =============================================
   HEIGHT IMPERIAL (TDEE + BMI)
   ============================================= */

.calc-height-imperial {
    display: none;
    gap: 8px;
    align-items: stretch;
    flex: 1;
}
.calc-height-imperial.visible {
    display: flex;
}
.calc-height-imperial input {
    flex: 1;
    min-width: 0;
}

/* =============================================
   CALCULATE BUTTON
   ============================================= */

.calc-submit {
    width: 100%;
    padding: 16px;
    font-size: var(--text-body-lg);
    font-weight: 700;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-normal);
    font-family: var(--font-primary);
}
.calc-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 80px rgba(76, 175, 80, 0.5);
}
.calc-submit:active {
    transform: translateY(0);
}

/* =============================================
   RESULTS SECTION
   ============================================= */

.calc-results {
    display: none;
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
}
.calc-results .container {
    max-width: 800px;
}
.calc-results.visible {
    display: block;
}

.calc-results-title {
    font-size: var(--text-h2);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* =============================================
   MAIN NUMBER CARDS (TDEE + BMI)
   ============================================= */

.calc-main-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.calc-main-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}
.calc-main-card.highlight {
    border-color: rgba(76, 175, 80, 0.3);
    background: rgba(76, 175, 80, 0.05);
}
.calc-card-label {
    font-size: var(--text-small);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 8px;
}
.calc-card-value {
    font-size: clamp(36px, 6vw, 48px);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}
.calc-main-card.highlight .calc-card-value {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.calc-card-unit {
    font-size: var(--text-small);
    color: var(--color-text-tertiary);
    font-weight: 400;
}
.calc-card-formula {
    font-size: var(--text-caption);
    color: var(--color-text-tertiary);
    margin-top: 4px;
}

/* =============================================
   DATA TABLE (TDEE + BMI)
   ============================================= */

.calc-targets-title {
    font-size: var(--text-h3);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}
.calc-table-wrap {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}
.calc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-small);
}
.calc-table thead th {
    background: rgba(76, 175, 80, 0.15);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border);
}
.calc-table tbody td {
    padding: 12px 16px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.calc-table tbody tr:last-child td { border-bottom: none; }
.calc-table tbody tr:hover { background: rgba(255, 255, 255, 0.03); }
.calc-table tbody td:first-child {
    font-weight: 500;
    color: var(--color-text-primary);
}

/* =============================================
   SAFETY WARNING (TDEE)
   ============================================= */

.calc-warning {
    display: none;
    background: rgba(255, 152, 0, 0.1);
    border: 1px solid rgba(255, 152, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--text-small);
    color: #FFB74D;
    line-height: 1.6;
}
.calc-warning.visible { display: block; }

/* =============================================
   CTA CARD
   ============================================= */

.calc-cta {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}
.calc-cta h2 {
    font-size: var(--text-h3);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}
.calc-cta p {
    color: var(--color-text-secondary);
    font-size: var(--text-body);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.calc-store-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}
.calc-store-badges img {
    height: 48px;
    width: auto;
    transition: opacity var(--transition-fast);
}
.calc-store-badges a:hover img { opacity: 0.8; }

/* =============================================
   SEO CONTENT
   ============================================= */

.calc-content {
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
    border-top: 1px solid var(--color-border);
}
.calc-content .container {
    max-width: 800px;
}
.calc-content h2 {
    font-size: var(--text-h3);
    font-weight: 700;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}
.calc-content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}
.calc-content p {
    color: var(--color-text-secondary);
    font-size: var(--text-body);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}
.calc-content a {
    color: var(--color-accent-green);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.calc-content a:hover { opacity: 0.8; }
.calc-content ul, .calc-content ol {
    color: var(--color-text-secondary);
    font-size: var(--text-body);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
}
.calc-content li { margin-bottom: 4px; }
.calc-content strong { color: var(--color-text-primary); }

/* =============================================
   FORMULA BOX
   ============================================= */

.calc-formula {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: var(--text-small);
    color: #66BB6A;
    line-height: 1.8;
    overflow-x: auto;
}

/* =============================================
   CONTENT TABLE
   ============================================= */

.calc-content-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-small);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.calc-content-table thead th {
    background: rgba(76, 175, 80, 0.15);
    padding: 10px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border);
}
.calc-content-table tbody td {
    padding: 10px 16px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.calc-content-table tbody tr:last-child td { border-bottom: none; }
.calc-content-table tbody tr:hover { background: rgba(255, 255, 255, 0.03); }

/* =============================================
   CALLOUT BOX
   ============================================= */

.calc-callout {
    background: var(--color-bg-card);
    border-left: 4px solid var(--color-accent-green);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}
.calc-callout p {
    margin-bottom: 0;
}

/* =============================================
   FAQ SECTION
   ============================================= */

.calc-faq {
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
}
.calc-faq .container {
    max-width: 800px;
}
.calc-faq-title {
    font-size: var(--text-h2);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* =============================================
   RESPONSIVE — SHARED
   ============================================= */

@media (max-width: 768px) {
    .calc-form-grid {
        grid-template-columns: 1fr;
    }
    .calc-main-cards {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 520px) {
    .calc-store-badges { flex-direction: column; }
}
@media (max-width: 480px) {
    .calc-form-card { padding: var(--spacing-md); }
    .calc-hero { padding-top: calc(70px + var(--spacing-lg)); }
    .calc-cta { padding: var(--spacing-lg); }
}