/* ============================================
   DESIGN SYSTEM & CSS VARIABLES
   ============================================ */
:root {
    /* Color Palette - Blue/Teal, White, Black */
    --primary-blue: #0ea5e9;
    --primary-blue-dark: #0284c7;
    --primary-blue-light: #38bdf8;
    --primary-blue-glow: rgba(14, 165, 233, 0.3);

    --neutral-black: #0a0a0a;
    --neutral-gray-900: #1a1a1a;
    --neutral-gray-800: #2a2a2a;
    --neutral-gray-700: #3a3a3a;
    --neutral-gray-600: #4a4a4a;
    --neutral-gray-500: #6a6a6a;
    --neutral-gray-400: #8a8a8a;
    --neutral-gray-300: #aaaaaa;
    --neutral-gray-200: #d4d4d4;
    --neutral-gray-100: #e8e8e8;
    --neutral-white: #ffffff;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', var(--font-primary);

    /* 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: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-blue: 0 10px 30px var(--primary-blue-glow);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--neutral-gray-700);
    background-color: var(--neutral-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--neutral-black);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

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

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-blue-dark);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--neutral-gray-100);
    padding: var(--spacing-md) 0;
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-black);
    text-decoration: none;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.logo:hover {
    color: var(--primary-blue);
}

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

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--neutral-gray-600);
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--neutral-white);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    background: var(--primary-blue-dark);
    color: var(--neutral-white);
    transform: translateY(-2px);
    box-shadow: 0 15px 35px var(--primary-blue-glow);
}

.btn-primary:active {
    transform: translateY(0);
    color: var(--neutral-white);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1.125rem 2.25rem;
    font-size: 1.125rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    overflow: hidden;
}

.hero .container {
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: var(--neutral-white);
    border: 1px solid var(--neutral-gray-200);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--neutral-gray-700);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.hero-badge svg {
    color: var(--primary-blue);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.highlight {
    color: var(--primary-blue);
    position: relative;
    display: inline;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--neutral-gray-600);
    margin-bottom: var(--spacing-xl);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    margin-bottom: var(--spacing-xl);
}

.hero-cta .btn {
    margin-bottom: var(--spacing-sm);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--neutral-gray-500);
}

/* Value Props */
.value-props {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--neutral-gray-200);
}

.value-prop {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--neutral-gray-600);
}

.value-prop svg {
    color: var(--primary-blue);
    flex-shrink: 0;
}

.value-prop strong {
    color: var(--neutral-black);
}

/* ============================================
   SECTION STYLES
   ============================================ */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

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

.section-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #f0f9ff;
    color: var(--primary-blue);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    color: var(--neutral-gray-500);
    font-size: 1.125rem;
    max-width: 600px;
    margin: var(--spacing-sm) auto 0;
    line-height: 1.6;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

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

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

.feature-card {
    padding: var(--spacing-xl);
    background: var(--neutral-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--neutral-gray-100);
    transition: all var(--transition-base);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f9ff;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    background: var(--primary-blue-glow);
}

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

.feature-card p {
    color: var(--neutral-gray-600);
    margin: 0;
    font-size: 0.9375rem;
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */
.how-it-works {
    background: var(--neutral-white);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
}

.step-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--neutral-white);
    border: 2px solid var(--neutral-gray-100);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
}

.step-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-blue);
    color: var(--neutral-white);
    font-weight: 700;
    font-size: 1.5rem;
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

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

.step-card h3 {
    margin-bottom: var(--spacing-sm);
}

.step-card p {
    color: var(--neutral-gray-600);
    margin: 0;
    font-size: 0.9375rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--neutral-black);
    color: var(--neutral-gray-400);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr;
    }
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-white);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--neutral-gray-500);
    margin: 0;
}

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

.footer-links a {
    color: var(--neutral-gray-400);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--neutral-gray-800);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--neutral-gray-600);
}

/* ============================================
   PRIVACY POLICY PAGE STYLES
   ============================================ */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-md);
}

@media (min-width: 768px) {
    .privacy-content {
        padding: var(--spacing-3xl) var(--spacing-xl);
    }
}

.privacy-content h1 {
    margin-bottom: var(--spacing-sm);
}

.privacy-content .last-updated {
    font-size: 0.9375rem;
    color: var(--neutral-gray-500);
    margin-bottom: var(--spacing-2xl);
}

.privacy-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid #f0f9ff;
}

.privacy-content h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-gray-800);
}

.privacy-content p {
    line-height: 1.8;
    color: var(--neutral-gray-700);
}

.privacy-content ul, .privacy-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.privacy-content li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
    color: var(--neutral-gray-700);
}

.privacy-content strong {
    color: var(--neutral-black);
}

.privacy-content .note {
    background: #f0f9ff;
    border-left: 4px solid var(--primary-blue);
    padding: var(--spacing-md);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: var(--spacing-md) 0;
}

.privacy-content .note p {
    margin: 0;
    font-weight: 500;
}

.privacy-content hr {
    border: none;
    border-top: 1px solid var(--neutral-gray-200);
    margin: var(--spacing-xl) 0;
}

.privacy-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */
@media (max-width: 767px) {
    section {
        padding: var(--spacing-2xl) 0;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .value-props {
        flex-direction: column;
        align-items: center;
    }
}

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