/* ===================================
   Calculadora de Tarifa Freelance
   Mobile-first CSS
   =================================== */

/* CSS Variables */
:root {
    --color-primary: #10B981;
    --color-primary-dark: #059669;
    --color-primary-light: #D1FAE5;
    --color-secondary: #3B82F6;
    --color-secondary-light: #DBEAFE;
    --color-background: #F9FAFB;
    --color-surface: #FFFFFF;
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-text-lighter: #9CA3AF;
    --color-border: #E5E7EB;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-error: #EF4444;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --transition-speed: 0.2s;
}

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Base */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
    min-height: 100dvh;
}

/* Container */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: 32px;
}

/* Header */
.header {
    text-align: center;
    padding: 24px 0 16px;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Main */
.main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Inputs Section */
.inputs-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--color-text-lighter);
}

/* Number Input with Prefix */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix {
    position: absolute;
    left: 16px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-light);
    pointer-events: none;
}

input[type="number"] {
    width: 100%;
    height: 52px;
    padding: 12px 16px 12px 36px;
    font-size: 1.125rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    -webkit-appearance: none;
    -moz-appearance: textfield;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

input[type="number"]::placeholder {
    color: var(--color-text-lighter);
    font-weight: 400;
}

/* Hide number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Slider Wrapper */
.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-wrapper output {
    min-width: 60px;
    text-align: right;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

/* Range Input */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--color-surface);
    transition: transform var(--transition-speed), background var(--transition-speed);
}

input[type="range"]::-webkit-slider-thumb:hover,
input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(1.1);
    background: var(--color-primary-dark);
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--color-surface);
}

/* Select */
select {
    width: 100%;
    height: 52px;
    padding: 12px 40px 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Results Section */
.results-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.results-section h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.result-card {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.result-card.result-main {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 24px;
}

.result-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.8;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.result-card.result-main .result-value {
    font-size: 2.5rem;
}

/* Comparison Card */
.comparison-card {
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 16px;
}

.comparison-card h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.comparison-country {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: 12px;
}

/* Market Ranges */
.market-ranges {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.market-range {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: background var(--transition-speed), transform var(--transition-speed);
}

.market-range.active {
    background: var(--color-primary);
    color: white;
    transform: scale(1.02);
}

.range-label {
    font-weight: 500;
}

.range-values {
    font-weight: 600;
    color: var(--color-text-light);
}

.market-range.active .range-values {
    color: white;
}

/* Your Position */
.your-position {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--color-primary);
}

.position-indicator {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.position-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.your-position.below-market {
    border-left-color: var(--color-warning);
}

.your-position.below-market .position-indicator {
    color: var(--color-warning);
}

.your-position.above-market {
    border-left-color: var(--color-secondary);
}

.your-position.above-market .position-indicator {
    color: var(--color-secondary);
}

/* Share Button */
.btn-share {
    width: 100%;
    height: 52px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    background: var(--color-primary-light);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background var(--transition-speed), transform var(--transition-speed);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn-share:hover {
    background: var(--color-primary);
    color: white;
}

.btn-share:active {
    transform: scale(0.98);
}

/* Info Section */
.info-section {
    margin-top: 8px;
}

.info-accordion {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.info-accordion summary {
    padding: 16px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-accordion summary::-webkit-details-marker {
    display: none;
}

.info-accordion summary::after {
    content: '+';
    margin-left: auto;
    font-size: 1.25rem;
    color: var(--color-text-light);
    transition: transform var(--transition-speed);
}

.info-accordion[open] summary::after {
    transform: rotate(45deg);
}

.info-content {
    padding: 0 16px 16px;
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.info-content p {
    margin-bottom: 12px;
}

.info-content ul {
    margin-left: 20px;
    margin-bottom: 12px;
}

.info-content li {
    margin-bottom: 6px;
}

.info-content strong {
    color: var(--color-text);
}

.formula {
    background: var(--color-background);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--color-text);
    margin-top: 8px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px 0 8px;
    font-size: 0.8rem;
    color: var(--color-text-lighter);
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1000;
    white-space: nowrap;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive - Tablet and up */
@media (min-width: 480px) {
    .container {
        padding: 24px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .results-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .result-card.result-main {
        grid-column: 1 / -1;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }

    .inputs-section {
        padding: 28px;
    }

    .results-section {
        padding: 28px;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.result-card.result-main.calculating {
    animation: pulse 0.5s ease;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}