/* =========================================================
   WebSellers - Subsídio Amazon FBA Landing Page
   Mobile-first | Visual Meta Lead Form
   ========================================================= */

/* ---------------------------------------------------------
   1. CSS CUSTOM PROPERTIES
   --------------------------------------------------------- */
:root {
    --color-bg-dark: #1a1a2e;
    --color-bg-dark-lighter: #16213e;
    --color-accent: #f5a623;
    --color-accent-hover: #e6951a;
    --color-primary-btn: #1877f2;
    --color-primary-btn-hover: #166fe5;
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-700: #374151;
    --color-gray-900: #111827;
    --color-error: #ef4444;
    --color-success: #22c55e;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                   Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --border-input: 1px solid var(--color-gray-300);

    --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-step: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    --max-width-card: 440px;
    --hero-min-height: 240px;
}

/* ---------------------------------------------------------
   2. RESET / BASE
   --------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: var(--color-gray-100);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ---------------------------------------------------------
   3. HERO SECTION
   --------------------------------------------------------- */
.hero {
    position: relative;
    background: #000;
    overflow: hidden;
}

.banner-image {
    width: 100%;
    height: auto;
    display: block;
}

.hero__text {
    display: none;
}

@media (min-width: 768px) {
    .banner-image--mobile {
        display: none;
    }

    .hero__text {
        display: block;
        color: var(--color-white);
        text-align: center;
        font-size: var(--font-size-3xl);
        font-weight: 800;
        text-transform: uppercase;
        letter-spacing: 0.02em;
        padding: 60px var(--space-xl) 200px;
        margin: 0;
    }

    .hero__highlight {
        color: var(--color-accent);
    }
}

/* ---------------------------------------------------------
   4. FORM CONTAINER / LAYOUT
   --------------------------------------------------------- */
.form-container {
    max-width: 520px;
    margin: -12px auto 0;
    padding: 0 var(--space-md) var(--space-2xl);
    position: relative;
    z-index: 2;
}

@media (min-width: 768px) {
    .form-container {
        margin: -180px auto 0;
    }
}

/* ---------------------------------------------------------
   5. PROGRESS BAR
   --------------------------------------------------------- */
.progress-bar {
    max-width: var(--max-width-card);
    margin: 0 auto var(--space-lg);
    height: 4px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar__fill {
    height: 100%;
    background: var(--color-primary-btn);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width var(--transition-normal);
}

/* ---------------------------------------------------------
   6. CARD (Meta Lead Form style)
   --------------------------------------------------------- */
.card {
    background: var(--color-white);
    padding: var(--space-xl) var(--space-lg);
    max-width: var(--max-width-card);
    margin: 0 auto;
    width: 100%;
}

/* Intro card - top of unified surface */
.card--intro {
    text-align: center;
    position: relative;
    padding-top: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.04);
}

/* Question cards - continuous surface */
.card--question {
    border-top: 1px solid var(--color-gray-100);
}

/* Step cards: last visible gets bottom radius + shadow */
.card--step.card--last-visible {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

/* Step fade-in animation */
.card--step.card--step-in {
    animation: stepFadeIn 300ms ease forwards;
}

@keyframes stepFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Hidden cards */
.card--hidden {
    display: none;
}

/* ---------------------------------------------------------
   PAGE NAVIGATION
   --------------------------------------------------------- */
.page {
    display: none;
}

.page--active {
    display: block;
    animation: pageIn 300ms ease forwards;
}

/* Result page: no slide animation, seamless with intro */
#page-4.page--active {
    animation: none;
}

.page--exit {
    display: block;
    animation: pageOut 250ms ease forwards;
}

/* Modal overlay for pages 2+ */
.page--overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    overflow-y: auto;
}

.page--overlay.page--active {
    display: flex;
    animation: overlayIn 300ms ease forwards;
}

.page--overlay.page--exit {
    display: flex;
    animation: overlayOut 250ms ease forwards;
}

.page--overlay .card--question {
    margin-top: 0;
    max-width: var(--max-width-card);
    width: 100%;
    border-radius: var(--radius-lg);
    border-top: none;
    box-shadow: var(--shadow-card);
}

@keyframes overlayIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes overlayOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}

@keyframes pageIn {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes pageOut {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(-30px); }
}

/* Horizontal logo (symbol + text) */
.card__logo-horizontal {
    max-width: 75%;
    height: auto;
    margin: 0 auto var(--space-xs);
    display: block;
}

.card__badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.badge-icon {
    font-size: var(--font-size-xl);
}

.badge-text {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-gray-900);
}

.card__description {
    color: var(--color-gray-500);
    font-size: var(--font-size-base);
    margin-bottom: 0;
}

.card__description--highlight {
    color: var(--color-gray-700);
    font-size: var(--font-size-lg);
}

.card__description--highlight strong {
    color: var(--color-accent);
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
}

.card__subtitle {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
}

.card__question {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-lg);
    line-height: 1.4;
}

.card__social-proof {
    margin-bottom: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.proof-item {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    padding-left: var(--space-md);
    position: relative;
}

.proof-item::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

/* ---------------------------------------------------------
   8. STEP INDICATOR
   --------------------------------------------------------- */
.step-indicator {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

/* ---------------------------------------------------------
   9. FORM ELEMENTS
   --------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--space-xs);
    font-weight: 400;
}

.form-input,
.form-select {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: var(--border-input);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    color: var(--color-gray-900);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8.825L.35 3.175l.7-.7L6 7.425l4.95-4.95.7.7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

.form-input:focus,
.form-select:focus {
    border-color: var(--color-primary-btn);
    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.12);
}

.form-input.error,
.form-select.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.form-error {
    display: block;
    color: var(--color-error);
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    min-height: 0;
}

.form-error:empty {
    display: none;
}

/* ---------------------------------------------------------
   10. PHONE INPUT
   --------------------------------------------------------- */
.phone-input-wrapper {
    display: flex;
    align-items: stretch;
    border: var(--border-input);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.phone-input-wrapper:focus-within {
    border-color: var(--color-primary-btn);
    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.12);
}

.phone-input-wrapper.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.phone-prefix {
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: var(--color-gray-50);
    border-right: 1px solid var(--color-gray-200);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    white-space: nowrap;
    font-weight: 500;
}

.form-input--phone {
    border: none;
    border-radius: 0;
    box-shadow: none !important;
}

.form-input--phone:focus {
    box-shadow: none !important;
}

/* ---------------------------------------------------------
   11. RADIO BUTTONS (card-style like Meta)
   --------------------------------------------------------- */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.radio-option {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 14px 16px;
    border: var(--border-input);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.radio-option:hover {
    border-color: var(--color-primary-btn);
    background-color: var(--color-gray-50);
}

.radio-option:has(input:checked) {
    border-color: var(--color-primary-btn);
    background-color: rgba(24, 119, 242, 0.04);
}

/* Fallback class for browsers without :has() */
.radio-option.selected {
    border-color: var(--color-primary-btn);
    background-color: rgba(24, 119, 242, 0.04);
}

.radio-option input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--color-primary-btn);
    flex-shrink: 0;
    margin: 0;
    cursor: pointer;
}

.radio-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    line-height: 1.4;
    cursor: pointer;
}

/* ---------------------------------------------------------
   12. CHECKBOX
   --------------------------------------------------------- */
.checkbox-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
}

.checkbox-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary-btn);
    flex-shrink: 0;
    margin-top: 2px;
    cursor: pointer;
}

.checkbox-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    line-height: 1.5;
}

/* ---------------------------------------------------------
   13. BUTTONS
   --------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 14px 24px;
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
    line-height: 1;
}

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

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

.btn--primary:hover {
    background-color: var(--color-primary-btn-hover);
    text-decoration: none;
}

.btn--primary:disabled {
    background-color: var(--color-gray-300);
    cursor: not-allowed;
    transform: none;
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-primary-btn);
    border: 1px solid var(--color-gray-300);
}

.btn--secondary:hover {
    background-color: var(--color-gray-50);
}

.btn--full {
    width: 100%;
}

.btn--cta {
    padding: 16px 24px;
    font-size: var(--font-size-lg);
}

/* Step actions layout */
.step-actions {
    margin-top: var(--space-lg);
}

.step-actions--split {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.step-actions--split .btn--secondary {
    flex-shrink: 0;
}

.step-actions--split .btn--primary {
    flex: 1;
}

/* ---------------------------------------------------------
   14. LOADING SPINNER
   --------------------------------------------------------- */
.btn__spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.btn--loading .btn__text {
    display: none;
}

.btn--loading .btn__spinner {
    display: inline-block;
}

/* ---------------------------------------------------------
   15. RESULT SCREENS
   --------------------------------------------------------- */
.card--result {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    margin-top: 0;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border-top: 1px solid var(--color-gray-100);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.result-icon {
    margin: 0 auto var(--space-lg);
    color: var(--color-gray-400);
}

.result-icon--warning {
    color: var(--color-accent);
}

.result-icon-circle {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    overflow: hidden;
}

.result-logo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-brand {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
}

.result-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-md);
}

.result-message {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.result-submessage {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
}

.result-subtext {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    margin-top: var(--space-md);
}

.card--result-premium {
    border-top: 3px solid var(--color-accent);
}

/* ---------------------------------------------------------
   16. HONEYPOT (hidden anti-bot)
   --------------------------------------------------------- */
.hp-wrap {
    position: absolute;
    left: -9999px;
    top: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

/* ---------------------------------------------------------
   17. ANIMATIONS
   --------------------------------------------------------- */
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ---------------------------------------------------------
   18. DESKTOP BREAKPOINT
   --------------------------------------------------------- */
@media (min-width: 768px) {
    .form-container {
        padding: var(--space-2xl) var(--space-md);
    }

    .card {
        padding: var(--space-2xl);
    }

    .card__question {
        font-size: var(--font-size-lg);
    }
}