/**
 * Bymtel Enhanced Calculator Styles v2.0.0
 * Ethical Financing Calculator with Glassmorphism and Transparency
 *
 * Features:
 * - Glassmorphism design
 * - Frequency toggle buttons
 * - Term selection grid
 * - Expandable transparency section
 * - Teal/Cyan accent colors
 * - Accessibility focused
 */

/* ============================================
   CSS Custom Properties
   ============================================ */

.bymtel-calculator {
    --calc-primary: #41BAC8;
    --calc-primary-dark: #213667;
    --calc-accent: #2dd4bf;
    --calc-accent-dark: #14b8a6;
    --calc-bg: #F6F1F1;
    --calc-surface: rgba(255, 255, 255, 0.85);
    --calc-surface-hover: rgba(255, 255, 255, 0.95);
    --calc-text: #121211;
    --calc-text-secondary: #6b7280;
    --calc-border: rgba(65, 186, 200, 0.2);
    --calc-shadow: 0 8px 32px rgba(33, 54, 103, 0.1);
    --calc-shadow-hover: 0 12px 40px rgba(33, 54, 103, 0.15);
    --calc-glow: 0 0 20px rgba(45, 212, 191, 0.3);
    
    max-width: 480px;
    margin: 0 auto;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ============================================
   Header
   ============================================ */

.bymtel-calculator__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    background: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.bymtel-calculator__header:hover {
    background: var(--calc-surface-hover);
    box-shadow: var(--calc-shadow);
}

.bymtel-calculator.is-active .bymtel-calculator__header {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom-color: transparent;
}

.bymtel-calculator__title {
    margin: 0 0 0.25rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--calc-text);
    font-family: 'Orbitron', sans-serif;
}

.bymtel-calculator__subtitle {
    margin: 0;
    font-size: 0.875rem;
    color: var(--calc-text-secondary);
}

.bymtel-calculator__toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: linear-gradient(135deg, var(--calc-primary), var(--calc-accent));
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.bymtel-calculator__toggle-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--calc-glow);
}

.bymtel-calculator__toggle-btn svg {
    transition: transform 0.3s ease;
}

.bymtel-calculator.is-active .bymtel-calculator__toggle-btn svg {
    transform: rotate(180deg);
}

/* ============================================
   Collapsible Body
   ============================================ */

.bymtel-calculator__collapsible {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.bymtel-calculator.is-active .bymtel-calculator__collapsible {
    max-height: 2000px;
    transition: max-height 0.5s ease-in;
}

.bymtel-calculator__body {
    padding: 1.5rem;
    background: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-top: none;
    border-radius: 0 0 16px 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ============================================
   Form Fields
   ============================================ */

.bymtel-calculator__field {
    margin-bottom: 1.5rem;
}

.bymtel-calculator__field:last-of-type {
    margin-bottom: 0;
}

.bymtel-calculator__label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.bymtel-calculator__field label,
.bymtel-calculator__field .bymtel-calculator__label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--calc-text);
}

.bymtel-calculator__value-display {
    font-size: 1rem;
    font-weight: 700;
    color: var(--calc-primary-dark);
    font-family: 'Orbitron', sans-serif;
}

/* Slider */
.bymtel-calculator__slider {
    width: 100%;
    height: 8px;
    margin-bottom: 0.75rem;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--calc-primary), var(--calc-accent));
    border-radius: 4px;
    outline: none;
}

.bymtel-calculator__slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: white;
    border: 3px solid var(--calc-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.2s ease;
}

.bymtel-calculator__slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--calc-glow);
}

.bymtel-calculator__slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: white;
    border: 3px solid var(--calc-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Input Group */
.bymtel-calculator__input-group {
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid var(--calc-border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.bymtel-calculator__input-group:focus-within {
    border-color: var(--calc-accent);
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
}

.bymtel-calculator__prefix {
    padding: 0.75rem 0.5rem 0.75rem 1rem;
    font-weight: 600;
    color: var(--calc-text-secondary);
    background: rgba(65, 186, 200, 0.05);
}

.bymtel-calculator__input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 0.25rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--calc-text);
    border: none;
    background: transparent;
    outline: none;
    font-family: 'Inter', sans-serif;
}

.bymtel-calculator__error {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: #dc2626;
    background: rgba(220, 38, 38, 0.1);
    border-radius: 8px;
}

/* ============================================
   Frequency Toggle
   ============================================ */

.bymtel-calculator__field--frequency {
    margin-bottom: 1.5rem;
}

.bymtel-calculator__frequency-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.bymtel-calculator__frequency-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: white;
    border: 2px solid var(--calc-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bymtel-calculator__frequency-btn:hover {
    border-color: var(--calc-primary);
    transform: translateY(-2px);
}

.bymtel-calculator__frequency-btn.is-active {
    background: linear-gradient(135deg, var(--calc-primary), var(--calc-accent));
    border-color: var(--calc-accent);
    color: white;
}

.bymtel-calculator__frequency-btn.is-active .bymtel-calculator__frequency-note {
    color: rgba(255, 255, 255, 0.8);
}

.bymtel-calculator__frequency-btn span:first-child {
    font-weight: 700;
    font-size: 1rem;
}

.bymtel-calculator__frequency-note {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--calc-text-secondary);
}

/* ============================================
   Term Selection
   ============================================ */

.bymtel-calculator__term-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.bymtel-calculator__term-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0.5rem;
    background: white;
    border: 2px solid var(--calc-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bymtel-calculator__term-btn:hover {
    border-color: var(--calc-primary);
    transform: translateY(-2px);
}

.bymtel-calculator__term-btn.is-active {
    background: linear-gradient(135deg, var(--calc-primary), var(--calc-accent));
    border-color: var(--calc-accent);
    color: white;
    box-shadow: var(--calc-glow);
}

.bymtel-calculator__term-btn.is-active .bymtel-calculator__term-label {
    color: rgba(255, 255, 255, 0.9);
}

.bymtel-calculator__term-number {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Orbitron', sans-serif;
}

.bymtel-calculator__term-label {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--calc-text-secondary);
}

/* ============================================
   Result Section
   ============================================ */

.bymtel-calculator__result {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(65, 186, 200, 0.1), rgba(45, 212, 191, 0.05));
    border: 2px solid var(--calc-border);
    border-radius: 16px;
    text-align: center;
}

.bymtel-calculator__result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.bymtel-calculator__result-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--calc-text-secondary);
}

.bymtel-calculator__installment-count {
    font-size: 0.75rem;
    color: var(--calc-primary-dark);
    font-weight: 500;
}

.bymtel-calculator__result-value {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.bymtel-calculator__currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--calc-accent-dark);
    margin-top: 0.5rem;
}

.bymtel-calculator__result-value span:last-child {
    font-size: 3rem;
    font-weight: 700;
    color: var(--calc-text);
    font-family: 'Orbitron', sans-serif;
    line-height: 1;
}

.bymtel-calculator__result-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0;
    font-size: 0.75rem;
    color: var(--calc-text-secondary);
}

/* ============================================
   Transparency Section
   ============================================ */

.bymtel-calculator__transparency {
    margin-top: 1.5rem;
}

.bymtel-calculator__transparency-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1rem 1.25rem;
    background: white;
    border: 2px solid var(--calc-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bymtel-calculator__transparency-toggle:hover {
    border-color: var(--calc-primary);
    background: rgba(65, 186, 200, 0.05);
}

.bymtel-calculator__transparency-toggle.is-expanded {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom-color: transparent;
}

.bymtel-calculator__transparency-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--calc-primary-dark);
}

.bymtel-calculator__transparency-label svg {
    color: var(--calc-accent);
}

.bymtel-calculator__transparency-icon {
    color: var(--calc-text-secondary);
    transition: transform 0.3s ease;
}

.bymtel-calculator__transparency-toggle.is-expanded .bymtel-calculator__transparency-icon {
    transform: rotate(180deg);
}

.bymtel-calculator__transparency-content {
    padding: 1.25rem;
    background: white;
    border: 2px solid var(--calc-border);
    border-top: none;
    border-radius: 0 0 12px 12px;
}

.bymtel-calculator__transparency-content[hidden] {
    display: none;
}

.bymtel-calculator__transparency-grid {
    display: grid;
    gap: 0.75rem;
}

.bymtel-calculator__transparency-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--calc-border);
}

.bymtel-calculator__transparency-item:last-child {
    border-bottom: none;
}

.bymtel-calculator__transparency-item--interest .bymtel-calculator__transparency-value {
    color: #dc2626;
}

.bymtel-calculator__transparency-item--total {
    padding-top: 1rem;
    margin-top: 0.5rem;
    border-top: 2px solid var(--calc-border);
    border-bottom: none;
}

.bymtel-calculator__transparency-item--total .bymtel-calculator__transparency-term {
    font-weight: 700;
    color: var(--calc-text);
}

.bymtel-calculator__transparency-item--total .bymtel-calculator__transparency-value {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--calc-primary-dark);
}

.bymtel-calculator__transparency-item--apr {
    background: linear-gradient(135deg, rgba(65, 186, 200, 0.1), rgba(45, 212, 191, 0.1));
    padding: 1rem;
    border-radius: 8px;
    margin-top: 0.5rem;
}

.bymtel-calculator__transparency-item--apr .bymtel-calculator__transparency-term {
    font-weight: 600;
}

.bymtel-calculator__transparency-item--apr .bymtel-calculator__transparency-value {
    font-weight: 700;
    color: var(--calc-accent-dark);
    font-family: 'Orbitron', sans-serif;
}

.bymtel-calculator__transparency-term {
    font-size: 0.875rem;
    color: var(--calc-text-secondary);
}

.bymtel-calculator__transparency-value {
    font-weight: 600;
    color: var(--calc-text);
    font-family: 'Orbitron', sans-serif;
}

.bymtel-calculator__transparency-disclaimer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--calc-border);
}

.bymtel-calculator__transparency-disclaimer p {
    margin: 0;
    font-size: 0.75rem;
    color: var(--calc-text-secondary);
    font-style: italic;
}

/* ============================================
   CTA Section
   ============================================ */

.bymtel-calculator__cta {
    margin-top: 2rem;
    text-align: center;
}

.bymtel-calculator__cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--calc-accent), var(--calc-accent-dark));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(45, 212, 191, 0.4);
}

.bymtel-calculator__cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(45, 212, 191, 0.5);
}

.bymtel-calculator__cta-btn:active {
    transform: translateY(0);
}

.bymtel-calculator__cta-btn svg {
    transition: transform 0.2s ease;
}

.bymtel-calculator__cta-btn:hover svg {
    transform: translateX(4px);
}

.bymtel-calculator__cta-note {
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
    color: var(--calc-text-secondary);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 480px) {
    .bymtel-calculator__header {
        padding: 1.25rem;
    }
    
    .bymtel-calculator__title {
        font-size: 1.125rem;
    }
    
    .bymtel-calculator__body {
        padding: 1.25rem;
    }
    
    .bymtel-calculator__term-options {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .bymtel-calculator__term-btn {
        padding: 0.75rem 0.25rem;
    }
    
    .bymtel-calculator__term-number {
        font-size: 1.25rem;
    }
    
    .bymtel-calculator__term-label {
        font-size: 0.625rem;
    }
    
    .bymtel-calculator__frequency-toggle {
        gap: 0.5rem;
    }
    
    .bymtel-calculator__frequency-btn {
        padding: 0.75rem 0.5rem;
    }
    
    .bymtel-calculator__result-value span:last-child {
        font-size: 2.5rem;
    }
}

/* ============================================
   Dark Mode Support
   ============================================ */

@media (prefers-color-scheme: dark) {
    .bymtel-calculator {
        --calc-bg: #1a1a1a;
        --calc-surface: rgba(30, 30, 30, 0.9);
        --calc-surface-hover: rgba(40, 40, 40, 0.95);
        --calc-text: #f5f5f5;
        --calc-text-secondary: #a1a1aa;
        --calc-border: rgba(65, 186, 200, 0.3);
        --calc-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        --calc-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
    }
    
    .bymtel-calculator__input-group,
    .bymtel-calculator__frequency-btn,
    .bymtel-calculator__term-btn,
    .bymtel-calculator__transparency-toggle,
    .bymtel-calculator__transparency-content {
        background: #252525;
    }
    
    .bymtel-calculator__prefix {
        background: rgba(65, 186, 200, 0.1);
    }
    
    .bymtel-calculator__result {
        background: linear-gradient(135deg, rgba(65, 186, 200, 0.15), rgba(45, 212, 191, 0.1));
    }
}

/* ============================================
   Animation
   ============================================ */

@keyframes calcPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(45, 212, 191, 0);
    }
}

.bymtel-calculator.is-updating .bymtel-calculator__result-value {
    animation: calcPulse 0.3s ease;
}

/* Focus styles for accessibility */
.bymtel-calculator__frequency-btn:focus,
.bymtel-calculator__term-btn:focus,
.bymtel-calculator__transparency-toggle:focus,
.bymtel-calculator__cta-btn:focus {
    outline: 2px solid var(--calc-accent);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .bymtel-calculator__collapsible {
        transition: none;
    }
    
    .bymtel-calculator__header,
    .bymtel-calculator__slider::-webkit-slider-thumb,
    .bymtel-calculator__frequency-btn,
    .bymtel-calculator__term-btn,
    .bymtel-calculator__cta-btn {
        transition: none;
    }
}