/* ========================================
   CSS VARIABLES - EASY THEME CUSTOMIZATION
   ======================================== */
:root {
    /* Primary Colors - Blue/Dark Blue */
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;

    /* Accent Colors - Lighter Blue */
    --color-accent: #0ea5e9;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    /* Neutral Colors - Dark Theme */
    --color-dark: #0a0f1e;
    --color-dark-secondary: #111827;
    --color-dark-card: #1a1f2e;
    --color-gray: #9ca3af;
    --color-gray-light: #d1d5db;
    --color-border: #2d3748;
    --color-white: #ffffff;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1e40af 0%, #0ea5e9 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* 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), 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 ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Layout */
    --max-width: 1280px;
    --navbar-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-light);
    background-color: var(--color-dark);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    height: var(--navbar-height);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--navbar-height);
}

.logo {
    font-size: var(--text-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    font-weight: 500;
    color: var(--color-gray);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary-light);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-xs);
}

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

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    font-size: var(--text-base);
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-gray-light);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(37, 99, 235, 0.1);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--text-lg);
}

.btn-block {
    width: 100%;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    padding: calc(var(--navbar-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--color-dark-secondary) 0%, var(--color-dark) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: var(--text-5xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    color: var(--color-white);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

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

.hero-image {
    position: relative;
}

.hero-placeholder {
    background: var(--gradient-dark);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-placeholder.placeholder-active::before {
    content: 'Product Screenshot';
    color: var(--color-white);
    font-size: var(--text-xl);
    opacity: 0.5;
}

.hero-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========================================
   STATS SECTION
   ======================================== */
.stats-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-dark-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: var(--text-4xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--text-base);
    color: var(--color-gray-light);
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
}

.stat-source {
    font-size: var(--text-sm);
    color: var(--color-gray);
    font-style: italic;
    margin-top: var(--spacing-xs);
}

/* ========================================
   SECTION HEADERS
   ======================================== */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    font-size: var(--text-4xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.section-subtitle {
    font-size: var(--text-xl);
    color: var(--color-gray);
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-dark);
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    background: var(--color-dark-secondary);
}

.feature-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.feature-description {
    color: var(--color-gray);
    line-height: 1.6;
}

/* ========================================
   SHOWCASE SECTION
   ======================================== */
.showcase-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-dark-secondary);
    border-top: 1px solid var(--color-border);
}

.showcase-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

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

.showcase-image {
    background: var(--gradient-dark);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
}

.showcase-image.placeholder-active::before {
    content: 'Screenshot';
    color: var(--color-white);
    font-size: var(--text-lg);
    opacity: 0.5;
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.showcase-title {
    font-size: var(--text-2xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
    font-weight: 600;
}

.showcase-description {
    color: var(--color-gray);
    font-size: var(--text-lg);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gradient-primary);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--text-4xl);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

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

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

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-dark-secondary);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

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

.footer-title {
    font-size: var(--text-2xl);
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

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

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

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

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

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

/* ========================================
   MODAL
   ======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-dark-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 100%;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: var(--text-3xl);
    color: var(--color-gray);
    transition: color var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--color-white);
}

.modal-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.modal-subtitle {
    color: var(--color-gray);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   FORMS
   ======================================== */
.waitlist-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.form-group label {
    font-weight: 600;
    color: var(--color-gray-light);
    font-size: var(--text-sm);
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    transition: border-color var(--transition-fast);
    font-family: inherit;
    background: var(--color-dark-secondary);
    color: var(--color-white);
}

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

.form-group input::placeholder {
    color: var(--color-gray);
    opacity: 0.7;
}

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

.form-row .form-group {
    min-width: 0;
}

.phone-input {
    display: flex;
    gap: var(--spacing-xs);
}

.phone-code {
    width: 80px;
    flex-shrink: 0;
}

.phone-input input {
    flex: 1;
}

.form-checkbox {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

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

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

.privacy-link {
    color: var(--color-primary-light);
    text-decoration: underline;
}

.privacy-link:hover {
    color: var(--color-primary);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
    }

    .features-grid,
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 3rem;
        --spacing-2xl: 2rem;
    }

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

    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--color-dark-secondary);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

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

    .hero-title {
        font-size: var(--text-4xl);
    }

    .hero-subtitle {
        font-size: var(--text-lg);
    }

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

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

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

    .hero-cta .btn {
        width: 100%;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--text-3xl);
    }

    .section-title {
        font-size: var(--text-3xl);
    }

    .modal-content {
        padding: var(--spacing-lg);
    }

    .modal-title {
        font-size: var(--text-2xl);
    }
}