/* ====================================
   ProtoBench.tech - Liquid Glass Design
   ==================================== */

/* === CSS Variables === */
:root {
    /* Color Palette - Tech Blue & Cyan */
    --primary-blue: #1E3A8A;
    --primary-blue-light: #3B82F6;
    --accent-cyan: #0EA5E9;
    --accent-cyan-light: #06B6D4;
    --accent-teal: #14B8A6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1E3A8A 0%, #3B82F6 50%, #0EA5E9 100%);
    --gradient-accent: linear-gradient(135deg, #0EA5E9 0%, #06B6D4 100%);
    --gradient-bg: linear-gradient(180deg, #0A0F1E 0%, #1A1F3A 100%);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius - Only rounded-2xl and rounded-full allowed */
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--gradient-bg);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* === Background Shapes === */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary-blue-light), transparent);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-cyan), transparent);
    top: 50%;
    right: -5%;
    animation-delay: -7s;
}

.shape-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--accent-teal), transparent);
    bottom: 10%;
    left: 20%;
    animation-delay: -14s;
}

.shape-4 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, var(--primary-blue), transparent);
    top: 30%;
    left: 50%;
    animation-delay: -3s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 30px) scale(0.9); }
}

/* === Glass Panel Effect === */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow);
    transition: all 0.4s var(--transition-smooth);
}

.glass-panel:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4), 
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

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

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    backdrop-filter: blur(20px) saturate(180%);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: #FFFFFF;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.8rem;
}

.logo-domain {
    color: var(--accent-cyan-light);
}

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

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s var(--transition-smooth);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
}

.nav-menu a:hover {
    color: var(--accent-cyan-light);
    background: rgba(255, 255, 255, 0.05);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: #FFFFFF;
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-smooth);
}

/* === Buttons === */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.4s var(--transition-smooth);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font-primary);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #FFFFFF;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-lg);
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === Section Styles === */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
}

/* === Features Section === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-md);
    transition: all 0.4s var(--transition-smooth);
}

.feature-card[data-tilt] {
    transform-style: preserve-3d;
}

.feature-card:hover {
    transform: translateY(-8px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* === How It Works Section === */
.how-it-works {
    background: rgba(0, 0, 0, 0.2);
}

.workflow-steps {
    max-width: 800px;
    margin: 0 auto;
}

.workflow-step {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-cyan-light);
    position: relative;
    z-index: 2;
}

.step-content {
    padding: var(--spacing-md);
    flex: 1;
}

.step-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.step-connector {
    position: absolute;
    left: 40px;
    top: 80px;
    bottom: -40px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), transparent);
}

.workflow-step:last-child .step-connector {
    display: none;
}

/* === Use Cases Section === */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.use-case-card {
    padding: var(--spacing-md);
    text-align: center;
    transition: all 0.4s var(--transition-smooth);
}

.use-case-card:hover {
    transform: translateY(-8px);
}

.use-case-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
}

.use-case-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.use-case-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* === CTA Section === */
.cta {
    background: rgba(0, 0, 0, 0.3);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.cta-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
}

.cta-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.email-input {
    flex: 1;
    min-width: 250px;
    padding: 1.125rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: #FFFFFF;
    font-size: 1rem;
    font-family: var(--font-primary);
    outline: none;
    transition: all 0.3s var(--transition-smooth);
}

.email-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.email-input:focus {
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.cta-note {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* === Footer === */
.footer {
    background: rgba(0, 0, 0, 0.4);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

.footer-heading {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

.footer-column a:hover {
    color: var(--accent-cyan-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s var(--transition-smooth);
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--accent-cyan-light);
    transform: translateY(-3px);
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    max-width: 450px;
    padding: var(--spacing-xl);
    text-align: center;
    animation: modalSlideIn 0.4s var(--transition-bounce);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #FFFFFF;
}

.modal-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.modal-message {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

/* === Animations === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--transition-smooth);
}

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

/* === Responsive Design === */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 15, 30, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.4s var(--transition-smooth);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
    }
    
    .nav-menu a {
        display: block;
        padding: var(--spacing-sm);
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-step {
        grid-template-columns: 60px 1fr;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
    
    .step-connector {
        left: 30px;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .email-input {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero {
        padding: calc(80px + var(--spacing-md)) 0 var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
}