/**
 * Landing Page CSS
 * 
 * Following SOP-CSS.md:
 * - Mobile-first approach
 * - CSS variables for theming
 * - DRY principles
 * - Proper specificity
 * - Dark mode support
 * 
 * Author: POF Development Team
 * Date: 2025-10-12
 */

/* ============================================================================
   CSS VARIABLES (Design Tokens)
   ============================================================================ */

:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #64748b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    /* Readiness Colors */
    --color-cold: #6b7280;
    --color-warm: #f59e0b;
    --color-hot: #ef4444;
    
    /* Neutrals */
    --color-bg: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Borders */
    --border-radius: 0.5rem;
    --border-width: 1px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
}

/* Dark Mode Variables - Using data-theme attribute for manual toggle */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
}

/* Also support prefers-color-scheme for systems without explicit toggle */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #0f172a;
        --color-text: #f1f5f9;
        --color-text-muted: #94a3b8;
        --color-border: #334155;
    }
}

/* Dark mode form inputs */
[data-theme="dark"] .form-group input[type="text"],
[data-theme="dark"] .form-group input[type="email"],
[data-theme="dark"] .form-group input[type="tel"],
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea {
    background: #1e293b;
    color: #f1f5f9;
    border-color: #475569;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .form-group input[type="text"],
    :root:not([data-theme="light"]) .form-group input[type="email"],
    :root:not([data-theme="light"]) .form-group input[type="tel"],
    :root:not([data-theme="light"]) .form-group select,
    :root:not([data-theme="light"]) .form-group textarea {
        background: #1e293b;
        color: #f1f5f9;
        border-color: #475569;
    }
}

/* ============================================================================
   BASE STYLES
   ============================================================================ */

.landing-container,
.quiz-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: var(--color-bg);
    min-height: 100vh;
}

/* Ensure body also uses our color scheme */
body {
    background: var(--color-bg);
    color: var(--color-text);
}

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

.hero-section {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.hero-content h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Ensure all sections have proper text colors */
.landing-container section h1,
.landing-container section h2,
.landing-container section h3 {
    color: var(--color-text);
}

.landing-container section p {
    color: var(--color-text-muted);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.cta-button,
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.cta-button,
.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
}

.cta-button:hover,
.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: var(--border-width) solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ============================================================================
   READINESS SECTION
   ============================================================================ */

.readiness-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    text-align: center;
}

.readiness-section h2 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.readiness-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.readiness-card {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
    /* Light mode: white cards */
    background: #ffffff;
}

.readiness-card h3 {
    /* Light mode: dark text */
    color: #1e293b;
}

.readiness-card p {
    /* Light mode: muted dark text */
    color: #64748b;
}

/* Dark mode: darker cards with lighter text */
[data-theme="dark"] .readiness-card {
    background: #1e293b;
    border-color: #475569;
}

[data-theme="dark"] .readiness-card h3 {
    color: #f1f5f9;
}

[data-theme="dark"] .readiness-card p {
    color: #94a3b8;
}

/* Support prefers-color-scheme for systems without explicit toggle */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .readiness-card {
        background: #1e293b;
        border-color: #475569;
    }
    
    :root:not([data-theme="light"]) .readiness-card h3 {
        color: #f1f5f9;
    }
    
    :root:not([data-theme="light"]) .readiness-card p {
        color: #94a3b8;
    }
}

.readiness-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 1rem;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.readiness-card.cold .readiness-badge {
    background: var(--color-cold);
    color: #ffffff;
}

.readiness-card.warm .readiness-badge {
    background: var(--color-warm);
    color: #ffffff;
}

.readiness-card.hot .readiness-badge {
    background: var(--color-hot);
    color: #ffffff;
}

/* ============================================================================
   VALUE SECTION
   ============================================================================ */

.value-section,
.credibility-section,
.cta-section {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.value-section h2,
.credibility-section h2,
.cta-section h2 {
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.value-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.value-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.value-item h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.value-item p {
    color: var(--color-text-muted);
}

/* ============================================================================
   CREDIBILITY SECTION
   ============================================================================ */

.credibility-content {
    max-width: 800px;
    margin: 0 auto;
}

.credibility-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* ============================================================================
   CTA SECTION
   ============================================================================ */

.cta-section {
    text-align: center;
}

.cta-section p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.cta-disclaimer {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-md);
}

/* ============================================================================
   QUIZ PROGRESS BAR
   ============================================================================ */

.quiz-progress {
    margin-bottom: var(--spacing-xl);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-border);
    border-radius: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.progress-text {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

/* ============================================================================
   QUIZ FORM
   ============================================================================ */

.quiz-content {
    max-width: 600px;
    margin: 0 auto;
}

.quiz-content h1 {
    color: var(--color-text);
}

.quiz-intro {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.quiz-form {
    margin-top: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    /* Ensure labels are always visible */
    opacity: 1;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Form error styling */
.hidden {
    display: none;
}

.form-error {
    color: var(--color-danger, #dc3545);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm, 0.5rem);
    display: none;
}

.form-error.show {
    display: block;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: normal;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
}

/* ============================================================================
   RESULTS PAGE
   ============================================================================ */

.results-reveal {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.readiness-result {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-xl);
}

.readiness-badge-large {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: 1.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    text-transform: uppercase;
    margin-bottom: var(--spacing-lg);
}

.readiness-result.cold {
    background: rgba(107, 114, 128, 0.1);
}

.readiness-result.cold .readiness-badge-large {
    background: var(--color-cold);
    color: #ffffff;
}

.readiness-result.warm {
    background: rgba(245, 158, 11, 0.1);
}

.readiness-result.warm .readiness-badge-large {
    background: var(--color-warm);
    color: #ffffff;
}

.readiness-result.hot {
    background: rgba(239, 68, 68, 0.1);
}

.readiness-result.hot .readiness-badge-large {
    background: var(--color-hot);
    color: #ffffff;
}

/* ============================================================================
   RESPONSIVE DESIGN (Mobile-First Breakpoints)
   ============================================================================ */

@media (min-width: 640px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .readiness-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) {
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .landing-container,
    .quiz-container {
        padding: var(--spacing-xl);
    }
}

@media (min-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}