/* ═══════════════════════════════════════════
   A FILA ANDOU — Design System
   Theme: Dark Premium com Gradientes Vibrantes
   Mobile-First
   ═══════════════════════════════════════════ */

:root {
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a28;
    --bg-input: #1e1e2e;
    --border: #2a2a3e;
    --border-focus: #6366f1;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #555570;
    --accent-1: #6366f1; /* Indigo */
    --accent-2: #8b5cf6; /* Violet */
    --accent-3: #ec4899; /* Pink */
    --gradient-main: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(236,72,153,0.08));
    --success: #10b981;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-glow: 0 0 60px rgba(99,102,241,0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */

.hero {
    position: relative;
    padding: 80px 0 60px;
    text-align: center;
    overflow: hidden;
}

.hero-bg-effect {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
    50% { opacity: 1; transform: translateX(-50%) scale(1.1); }
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-subtle);
    border: 1px solid rgba(99,102,241,0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-1);
    margin-bottom: 28px;
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.hero-subtitle strong {
    color: var(--text-primary);
}

.cta-hero {
    display: inline-block;
    padding: 16px 36px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 24px rgba(99,102,241,0.3);
}

.cta-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99,102,241,0.4);
}

/* ═══════════════════════════════════════════
   FORM SECTION
   ═══════════════════════════════════════════ */

.form-section {
    padding: 40px 0 80px;
}

.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    box-shadow: var(--shadow-glow);
}

.form-header {
    text-align: center;
    margin-bottom: 32px;
}

.form-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 6px;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Fields */
.field-group {
    margin-bottom: 24px;
}

.field-group > label:not(.chip):not(.aceite-label) {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.section-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

input[type="text"],
input[type="tel"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
    outline: none;
}

input[type="text"]:focus,
input[type="tel"]:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

input::placeholder {
    color: var(--text-muted);
}

/* Chips (Toggle Buttons) */
.chips-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.chips-areas {
    grid-template-columns: 1fr 1fr;
}

.chip {
    position: relative;
    cursor: pointer;
}

.chip input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.chip span {
    display: block;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.2s;
    user-select: none;
}

.chip-sm span {
    padding: 11px 12px;
    font-size: 0.85rem;
}

.chip input:checked + span {
    background: rgba(99,102,241,0.15);
    border-color: var(--accent-1);
    color: #fff;
    box-shadow: 0 0 12px rgba(99,102,241,0.1);
}

.chip:hover span {
    border-color: var(--text-muted);
}

.chip.shake span {
    animation: shake 0.4s ease-in-out;
}

/* Aceite */
.aceite-group {
    margin-top: 8px;
}

.aceite-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.aceite-label input[type="checkbox"] {
    margin-top: 3px;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-1);
    flex-shrink: 0;
}

/* Submit Button */
.btn-submit {
    width: 100%;
    padding: 16px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Inter', sans-serif;
    margin-top: 8px;
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(99,102,241,0.35);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.privacy-note {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 16px;
}

/* Success State */
.success-state {
    text-align: center;
    padding: 40px 20px;
}

.success-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    animation: pop 0.5s cubic-bezier(0.175, 0.885, 0.320, 1.275);
}

@keyframes pop {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

.success-state h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.success-state p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.success-share p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.btn-share {
    display: inline-block;
    padding: 12px 28px;
    background: #25d366;
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-share:hover {
    background: #1fb855;
    transform: translateY(-1px);
}

/* Error toast */
.error-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #ef4444;
    color: #fff;
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 9999;
    transition: transform 0.3s ease;
    box-shadow: 0 8px 24px rgba(239,68,68,0.3);
}

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

/* ═══════════════════════════════════════════
   HOW IT WORKS
   ═══════════════════════════════════════════ */

.how-it-works {
    padding: 60px 0 80px;
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d0d15 100%);
}

.how-it-works h2 {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 40px;
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s;
}

.step-card:hover {
    border-color: var(--accent-1);
    transform: translateY(-4px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    border-radius: 12px;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */

.footer {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer a {
    color: var(--accent-1);
    text-decoration: none;
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

@media (min-width: 640px) {
    .chips-grid:not(.chips-areas) {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .chips-areas {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .steps-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .form-card {
        padding: 44px 40px;
    }
}

/* ═══════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════ */

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}