/* ==========================================================================
   Authority Builder - Main Styles
   ========================================================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #0066CC;
    --primary-dark: #0052A3;
    --primary-light: #3385D6;
    --secondary: #6366F1;
    --accent: #10B981;
    --danger: #EF4444;
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-primary);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
}

p {
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--spacing-3xl) 0;
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-2xl) 0;
    }
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-link-login {
    color: var(--text-primary) !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: #4ecdc4;
    color: #1a1a2e;
}

.btn-primary:hover {
    background: #44c2b8;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(78, 205, 196, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    padding-top: calc(var(--spacing-3xl) + 60px);
    padding-bottom: var(--spacing-3xl);
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(78,205,196,0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(78,205,196,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: rgba(78,205,196,0.15);
    border: 1px solid rgba(78,205,196,0.4);
    color: #4ecdc4;
    border-radius: var(--radius-xl);
    font-size: 0.9em;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    color: white;
}

.gradient-text {
    background: linear-gradient(135deg, #4ecdc4 0%, #44c2b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.35rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.hero-proof-line {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-guarantee {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    margin-top: var(--spacing-md);
}

.hero-social-proof {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.social-proof-avatars {
    display: flex;
    margin-left: -8px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    border: 2px solid white;
    margin-left: -8px;
}

.social-proof-text {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.8);
    margin: 0;
}

.hero-visual {
    margin-top: var(--spacing-3xl);
}

.hero-image-placeholder {
    max-width: 900px;
    margin: 0 auto;
}

.placeholder-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
}

.placeholder-header {
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.placeholder-content {
    margin-bottom: var(--spacing-xl);
}

.placeholder-line {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.placeholder-line.short {
    width: 60%;
}

.placeholder-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Problem Section
   ========================================================================== */

.problem {
    background: var(--bg-primary);
    padding: var(--spacing-3xl) 0;
}

.problem-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-label {
    display: inline-block;
    background: rgba(0, 102, 204, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.section-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
    line-height: 1.7;
}

.problem-content {
    text-align: center;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.problem-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: left;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: transform 0.2s, box-shadow 0.2s;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
    line-height: 1;
}

.problem-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.problem-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.stat-callout {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.08) 0%, rgba(78, 205, 196, 0.08) 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
    margin-top: var(--spacing-md);
}

/* Cost Strip */
.cost-strip {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-top: var(--spacing-3xl);
    color: white;
}

.cost-strip h3 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 1.75rem;
    color: white;
}

.cost-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

.cost-item {
    text-align: center;
    padding: var(--spacing-md);
}

.cost-amount {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #4ecdc4;
    margin-bottom: var(--spacing-xs);
}

.cost-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
}

@media (max-width: 768px) {
    .problem-grid {
        grid-template-columns: 1fr;
    }
    
    .cost-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Insight Section
   ========================================================================== */

.insight {
    background: var(--bg-secondary);
    padding: var(--spacing-3xl) 0;
}

.insight-content {
    max-width: 900px;
    margin: 0 auto;
}

.insight-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.key-insight {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
}

.key-insight p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin: 0;
}

.key-insight strong {
    color: var(--primary);
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.feature-title {
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

.feature-list li:last-child {
    border-bottom: none;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   How It Works
   ========================================================================== */

.how-it-works {
    background: var(--bg-secondary);
}

.steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.step:last-child {
    margin-bottom: 0;
}

.step-reverse {
    grid-template-columns: auto 1fr 1fr;
}

.step-reverse .step-content {
    order: 2;
}

.step-reverse .step-visual {
    order: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-title {
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-secondary);
    margin: 0;
}

.step-visual {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.visual-placeholder {
    height: 200px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

@media (max-width: 968px) {
    .step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .step-reverse {
        grid-template-columns: 1fr;
    }
    
    .step-reverse .step-content,
    .step-reverse .step-visual {
        order: initial;
    }
    
    .step-number {
        margin: 0 auto var(--spacing-md);
    }
}

/* ==========================================================================
   Testimonials
   ========================================================================== */

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.testimonial-rating {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Pricing
   ========================================================================== */

.pricing {
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.pricing-name {
    margin-bottom: var(--spacing-sm);
}

.pricing-price {
    margin-bottom: var(--spacing-sm);
}

.price-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.price-period {
    font-size: 1rem;
    color: var(--text-secondary);
}

.pricing-description {
    color: var(--text-secondary);
    margin: 0;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-note {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
}

@media (max-width: 968px) {
    .pricing-featured {
        transform: scale(1);
    }
}

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

.cta {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(78,205,196,0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    margin-bottom: var(--spacing-md);
}

.cta-note {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: var(--text-light);
    margin: 0;
}

.footer-heading {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-light);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    color: var(--text-light);
    margin: 0;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.2s;
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-social svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 968px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}