/* CSS Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #272757;
    --color-primary-dark: #1d1d3f;
    --color-primary-light: #3d3d6f;
    --color-primary-lighter: #4d4d87;
    --color-primary-lightest: #e8e8f0;
    --color-secondary: #64748b;
    --color-accent: #272757;
    --color-background: #ffffff;
    --color-surface: #f8fafc;
    --color-text: #0a0a0a;
    --color-text-light: #3d3d6f;
    --color-text-muted: #64748b;
    --color-hero-text: #f8fafc;
    --color-hero-text-muted: #d1d5db;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3.5rem;
    --spacing-xxl: 5rem;
    --font-display: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h3 {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    line-height: 1.7;
    font-weight: 400;
}

.hero .lead {
    color: var(--color-hero-text-muted);
}

/* Layout Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-lg) 0;
}

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

/* Header */
header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(39, 39, 87, 0.08);
    z-index: 100;
    padding: var(--spacing-md) 0;
}

header .container {
    max-width: 1200px;
}

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

.logo-section {
    display: flex;
    align-items: center;
    min-width: fit-content;
    margin-left: -40px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
    min-width: fit-content;
}

.logo-img {
    height: 120px;
    width: auto;
    max-width: none;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
}

.logo-img[src=""],
.logo-img:not([src]) {
    display: none;
}

.logo-placeholder {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: calc(var(--spacing-xl) * 0.8) 0;
    min-height: 52vh;
    display: flex;
    align-items: center;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
}

.hero .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-lg);
}

.hero-content {
    grid-column: 1 / -1;
    padding: 0;
    text-align: left;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    max-width: 100%;
    color: var(--color-hero-text);
}

.hero-description {
    margin-bottom: var(--spacing-md);
    max-width: 100%;
    color: var(--color-hero-text-muted);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff !important;
    background-color: var(--color-primary);
    text-decoration: none;
    border-radius: 4px;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--color-primary-dark);
    color: #ffffff !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(39, 39, 87, 0.15);
}

.hero .btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-hero-text) !important;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero .btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    color: var(--color-hero-text) !important;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    color: #ffffff !important;
}

.btn-outline {
    background-color: transparent !important;
    color: var(--color-primary) !important;
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary) !important;
    color: #ffffff !important;
    border-color: var(--color-primary);
}

/* Form Styles */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.form-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid rgba(39, 39, 87, 0.08);
    box-shadow: 0 4px 12px rgba(39, 39, 87, 0.05);
}

.form-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.beta-badge {
    display: inline-block;
    background: var(--color-primary);
    color: #ffffff;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 1rem;
    font-family: var(--font-body);
    border: 1px solid rgba(39, 39, 87, 0.15);
    border-radius: 4px;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    background-color: var(--color-background);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(39, 39, 87, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    cursor: pointer;
}

.form-submit {
    width: 100%;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
}

.form-footer {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.form-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.form-footer a:hover {
    text-decoration: underline;
}

.error-message {
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.success-message {
    background-color: #10b981;
    color: #ffffff;
    padding: var(--spacing-sm);
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
    text-align: center;
    display: none;
}

/* Main Content with Sidebar Layout */
.main-content-section {
    padding: calc(var(--spacing-lg) * 0.4) 0 var(--spacing-lg) 0;
    background-color: var(--color-background);
}

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.content-section {
    scroll-margin-top: 120px;
}

/* Section Label (centered, small) */
.section-label-center {
    text-align: center;
    margin-bottom: var(--spacing-md);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--spacing-md);
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: inline-block;
}

/* What It Does Section */
.what-it-does-section {
    background-color: #ffffff;
    padding: var(--spacing-xl) 0;
}

.what-it-does-wrapper {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* What It Does Sidebar */
.what-it-does-sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
    max-height: calc(100vh - 120px);
}

.what-it-does-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.nav-item {
    display: block;
    padding: 0;
    color: var(--color-text-muted);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all var(--transition-base);
    width: 100%;
    box-sizing: border-box;
    position: relative;
}

.nav-item:hover {
    color: var(--color-text);
}

.nav-item.active {
    color: var(--color-text);
    border-left-color: var(--color-primary);
    font-weight: 700;
}

.nav-item.active .nav-item-text {
    color: var(--color-text);
    font-weight: 700;
}

.nav-item-text {
    font-size: 1.125rem;
    line-height: 1.6;
    display: block;
    font-weight: 400;
    transition: font-weight var(--transition-base);
    padding-left: var(--spacing-sm);
}

/* What It Does Content */
.what-it-does-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.what-it-does-item {
    padding: 0;
    scroll-margin-top: 100px;
    min-height: auto;
}

.item-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.item-title .title-part-1 {
    color: var(--color-text);
}

.item-title .title-part-2 {
    color: var(--color-text);
    font-weight: 400;
}

.item-detail {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
    margin: 0;
    max-width: 700px;
}

/* How It Works Section */
.how-it-works-section {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
}

/* How It Works Steps */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.step-item {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-md) 0;
    scroll-margin-top: 100px;
    min-height: 300px;
}

.step-item .step-detail {
    font-size: 1.125rem;
    line-height: 1.8;
}

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

.step-number {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.step-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.step-detail {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
    margin: 0;
}

.step-visual {
    width: 100%;
}

.step-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    display: block;
}

.step-visual .screenshot-placeholder {
    width: 100%;
    aspect-ratio: 4 / 3;
    max-height: 300px;
    background: var(--color-primary-lightest);
    border: 2px dashed var(--color-primary-lighter);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-label {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Footer */
footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(39, 39, 87, 0.08);
    text-align: center;
    background-color: #ffffff;
}

footer h3 {
    color: var(--color-primary);
    font-size: 1.75rem;
}

footer p {
    color: var(--color-text);
}

.footer-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.footer-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    border: 2px solid var(--color-primary);
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.1rem;
    transition: all var(--transition-base);
}

.footer-action-btn:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(39, 39, 87, 0.15);
}

.footer-action-label {
    display: block;
}

/* Demo Page Styles */
.demo-section {
    background-color: var(--color-background);
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.demo-container {
    max-width: 1000px;
    margin: 0 auto;
}

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

.demo-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.demo-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    margin: 0;
}

.demo-video-container {
    width: 100%;
    margin-bottom: var(--spacing-xl);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.demo-video {
    width: 100%;
    height: auto;
    display: block;
    background-color: #000;
}

.video-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(255, 255, 255, 0.03) 20px,
        rgba(255, 255, 255, 0.03) 40px
    );
}

.video-placeholder-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.video-placeholder-content svg {
    color: rgba(255, 255, 255, 0.9);
    opacity: 0.8;
}

.video-placeholder-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: white;
}

.video-placeholder-subtext {
    font-size: 1rem;
    opacity: 0.7;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.demo-description {
    margin-bottom: var(--spacing-xl);
}

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

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

.demo-feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.demo-feature-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    margin: 0;
}

.demo-cta {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-primary-lightest);
    border-radius: 12px;
    border: 1px solid rgba(39, 39, 87, 0.1);
}

.demo-cta-text {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }

    .what-it-does-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-md);
    }

    .what-it-does-sidebar {
        position: relative;
        top: 0;
        max-height: none;
        border-bottom: 1px solid rgba(15, 23, 42, 0.1);
        padding-bottom: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .what-it-does-nav {
        flex-direction: row;
        gap: var(--spacing-sm);
        overflow-x: auto;
        padding-bottom: var(--spacing-xs);
    }

    .nav-item {
        border-left: none;
        border-bottom: 2px solid transparent;
        padding: var(--spacing-sm) var(--spacing-md);
        white-space: nowrap;
        flex-shrink: 0;
    }

    .nav-item.active {
        border-left: none;
        border-bottom-color: var(--color-primary);
    }

    .nav-item-text {
        font-size: 0.9rem;
    }

    .what-it-does-item {
        min-height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
    }

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

    .step-visual {
        order: -1;
    }

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

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
        --spacing-xxl: 3.5rem;
    }

    .nav-links {
        gap: var(--spacing-md);
        font-size: 0.9rem;
    }

    .hero {
        min-height: 60vh;
    }

    .section, .section-large {
        padding: var(--spacing-lg) 0;
    }

    .footer-actions {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }

    nav {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
}

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

    .fade-in {
        opacity: 1;
        transform: none;
    }
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}