/* ========================================
   Underbar - Command line power, natural language ease
   Based on Reckr homepage design system
   ======================================== */

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

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors - Based on Substage/Terminal aesthetic */
    --color-black: #000000;
    --color-white: #ffffff;
    --color-primary: #FFB559; /* Gold/Amber */
    --color-accent: #6EE0FF; /* Cyan */
    --color-success: #4ADE80;
    --color-dark-overlay: rgba(13, 13, 13, 0.95);
    --color-gray-dark: #1a1a1a;
    --color-gray-medium: #888888;
    --color-gray-light: #cccccc;
    --color-terminal-bg: #0a0a0a;
    --color-terminal-green: #00FF41;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-text: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-radial: radial-gradient(circle at 50% 50%, var(--color-primary) 0%, transparent 70%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

    /* Font Sizes */
    --font-size-hero: 72px;
    --font-size-h1: 56px;
    --font-size-h2: 42px;
    --font-size-h3: 32px;
    --font-size-h4: 24px;
    --font-size-body: 18px;
    --font-size-small: 14px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-2xl: 120px;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;

    /* Borders */
    --border-radius: 12px;
    --border-radius-small: 8px;
    --border-radius-large: 20px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-white);
    background: var(--color-black);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-h1);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

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

a:hover {
    color: var(--color-accent);
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-text {
    color: var(--color-white);
    font-family: var(--font-mono);
}

.logo-underscore {
    color: var(--color-primary);
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 50%, 100% { opacity: 1; }
    25%, 75% { opacity: 0; }
}

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

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-white);
}

.cta-button {
    background: var(--gradient-primary);
    color: var(--color-black);
    padding: 10px 24px;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 181, 89, 0.3);
    color: var(--color-black);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--nav-height) + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
}

.gradient-orb-1 {
    background: var(--color-primary);
    top: -200px;
    right: -200px;
    animation: float 20s ease-in-out infinite;
}

.gradient-orb-2 {
    background: var(--color-accent);
    bottom: -200px;
    left: -200px;
    animation: float 20s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 181, 89, 0.1);
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    max-width: 900px;
}

.hero-description {
    font-size: 22px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.9);
}

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

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-black);
    padding: 16px 32px;
    border-radius: var(--border-radius);
    font-size: 18px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(255, 181, 89, 0.3);
    color: var(--color-black);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    padding: 16px 32px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    font-size: 18px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--color-white);
}

/* Terminal Demo */
.terminal-demo {
    background: var(--color-terminal-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot:nth-child(1) { background: #FF5F56; }
.terminal-dot:nth-child(2) { background: #FFBD2E; }
.terminal-dot:nth-child(3) { background: #27C93F; }

.terminal-content {
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
}

.terminal-prompt {
    color: var(--color-primary);
}

.terminal-command {
    color: var(--color-white);
}

.terminal-output {
    color: var(--color-terminal-green);
    margin-top: 10px;
}

/* Features Section */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--color-gray-dark);
}

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

.section-badge {
    display: inline-block;
    background: rgba(110, 224, 255, 0.1);
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* Waitlist Section */
.waitlist {
    padding: var(--spacing-2xl) 0;
    background: var(--color-black);
}

.waitlist-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: var(--spacing-lg) auto 0;
}

.waitlist-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-small);
    padding: 16px 20px;
    color: var(--color-white);
    font-size: 16px;
    transition: all var(--transition-fast);
}

.waitlist-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.08);
}

.waitlist-input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.waitlist-submit {
    background: var(--gradient-primary);
    color: var(--color-black);
    padding: 16px 32px;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.waitlist-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 181, 89, 0.3);
}

.waitlist-message {
    text-align: center;
    margin-top: var(--spacing-md);
    font-size: 16px;
}

.waitlist-message.success {
    color: var(--color-success);
}

.waitlist-message.error {
    color: #EF4444;
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0;
    background: var(--color-gray-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-small);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-hero: 48px;
        --font-size-h1: 36px;
        --font-size-h2: 28px;
        --font-size-h3: 24px;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        background: var(--color-dark-overlay);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transition: left var(--transition-normal);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

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

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

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

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