/* ===========================
   CSS Variables & Reset
   =========================== */

:root {
    /* Brand Colors */
    --primary-blue: #3B82F6;
    --secondary-blue: #0EA5E9;
    --dark-navy: #0F1A2E;
    --white: #FFFFFF;

    /* Grays */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-900);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-navy);
}

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

.nav-links a {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--gray-700);
    transition: all var(--transition-base);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.mobile-menu a:hover {
    background-color: var(--gray-100);
}

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

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-family);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 0.625rem 1.375rem;
}

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

.btn-primary-small {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-base);
    display: inline-block;
}

.btn-primary-small:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-full {
    width: 100%;
}

.btn-loader {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-content {
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

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

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

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
}

.stat-item {
    flex: 1;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: var(--spacing-xs);
}

.hero-visual {
    display: none;
}

/* ===========================
   Phone Mockup
   =========================== */

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background-color: var(--white);
    border-radius: 32px;
    overflow: hidden;
}

.app-preview {
    padding: var(--spacing-md);
}

.preview-header {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.preview-bar {
    height: 12px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 6px;
    flex: 1;
}

.preview-bar.short {
    flex: 0.3;
}

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

.preview-card {
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.card-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    opacity: 0.2;
}

.card-text {
    height: 8px;
    background-color: var(--gray-300);
    border-radius: 4px;
    margin-bottom: var(--spacing-xs);
}

.card-text.short {
    width: 60%;
}

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

.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

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

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

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.7;
}

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

.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.step-card {
    background-color: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

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

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-blue);
    font-weight: 700;
}

/* ===========================
   Screenshots
   =========================== */

.screenshots {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.screenshots-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

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

.screenshot-placeholder {
    aspect-ratio: 9 / 16;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

.screenshot-placeholder:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
}

.placeholder-content {
    text-align: center;
    padding: var(--spacing-lg);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.placeholder-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.placeholder-text {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

.screenshot-caption {
    font-weight: 600;
    color: var(--gray-700);
}

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

.pricing {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
}

.pricing-card {
    background-color: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    position: relative;
}

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

.pricing-card.featured {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.pricing-tier {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

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

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
}

.price-period {
    font-size: 1rem;
    color: var(--gray-600);
    font-weight: 500;
}

.pricing-description {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
}

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

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.pricing-features li svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.pricing-note {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    background-color: var(--gray-100);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-blue);
}

.pricing-note p {
    font-size: 0.875rem;
    color: var(--gray-700);
    line-height: 1.6;
}

/* ===========================
   Early Access / Email Capture
   =========================== */

.early-access {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
}

.early-access-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.early-access-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.early-access-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.email-capture-form {
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.email-input {
    flex: 1;
    min-width: 250px;
    padding: 1rem 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: var(--font-family);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    transition: all var(--transition-base);
}

.email-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.email-input:focus {
    outline: none;
    border-color: var(--white);
    background-color: rgba(255, 255, 255, 0.2);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: center;
}

.form-message.success {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.form-message.error {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--white);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.early-access-note {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

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

.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    background-color: var(--dark-navy);
    color: var(--white);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-tagline {
    color: var(--gray-400);
    margin-top: var(--spacing-sm);
    font-size: 0.9375rem;
}

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

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

.footer-heading {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
    font-size: 0.875rem;
}

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

.footer-social a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-social a:hover {
    color: var(--white);
}

/* ===========================
   Responsive Design
   =========================== */

@media (min-width: 1024px) {
    .hero {
        position: relative;
    }

    .hero .container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-2xl);
        align-items: center;
    }

    .hero-visual {
        display: flex;
        justify-content: center;
        align-items: center;
    }
}

@media (max-width: 1023px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .early-access-title {
        font-size: 2rem;
    }

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

    .step-arrow {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-carousel {
        grid-template-columns: 1fr 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .early-access-title {
        font-size: 1.75rem;
    }

    .form-group {
        flex-direction: column;
    }

    .email-input {
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

/* ===========================
   Utilities & Animations
   =========================== */

.fade-in {
    animation: fadeIn var(--transition-slow) ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft var(--transition-slow) ease-out;
}

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

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus states for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}