/* Technical Precision Aesthetic - Flow Landing Page */

:root {
    /* Color System - Deep Navy + Vibrant Cyan */
    --color-bg: #0a0e1a;
    --color-bg-elevated: #12182b;
    --color-bg-card: #1a2236;
    --color-primary: #00d4ff;
    --color-primary-dim: #0099cc;
    --color-accent: #ff6b35;
    --color-text: #e8eaed;
    --color-text-dim: #9ca3af;
    --color-text-dimmer: #6b7280;
    --color-border: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-body: 'IBM Plex Sans', -apple-system, system-ui, sans-serif;
    --font-display: 'Outfit', sans-serif;

    /* Spacing */
    --space-unit: 8px;
    --section-padding: calc(var(--space-unit) * 15);

    /* Animation */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Flow Canvas Background */
#flowCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    animation: slideDown 0.6s var(--ease-out);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--space-unit) * 2) calc(var(--space-unit) * 4);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: calc(var(--space-unit) * 1.5);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-logo svg {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: calc(var(--space-unit) * 4);
    align-items: center;
}

.nav-links a {
    color: var(--color-text-dim);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s var(--ease-out);
    position: relative;
}

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

.nav-cta {
    background: var(--color-primary);
    color: var(--color-bg) !important;
    padding: calc(var(--space-unit) * 1.5) calc(var(--space-unit) * 3);
    border-radius: 8px;
    font-weight: 600 !important;
    transition: all 0.3s var(--ease-out);
}

.nav-cta:hover {
    background: var(--color-primary-dim);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

/* Hero Section */
.hero {
    position: relative;
    z-index: 1;
    padding: calc(var(--section-padding) * 1.2) 0 var(--section-padding);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 calc(var(--space-unit) * 4);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--space-unit) * 8);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s var(--ease-out);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--space-unit) * 1.5);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: calc(var(--space-unit) * 1) calc(var(--space-unit) * 2);
    border-radius: 24px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-dim);
    margin-bottom: calc(var(--space-unit) * 4);
    animation: fadeIn 0.8s 0.2s var(--ease-out) both;
}

@keyframes fadeIn {
    from { opacity: 0; }
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    position: relative;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: calc(var(--space-unit) * 3);
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s 0.3s var(--ease-out) both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, #00a8cc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--color-text-dim);
    max-width: 540px;
    margin-bottom: calc(var(--space-unit) * 5);
    animation: fadeInUp 0.8s 0.4s var(--ease-out) both;
}

.hero-actions {
    display: flex;
    gap: calc(var(--space-unit) * 2);
    animation: fadeInUp 0.8s 0.5s var(--ease-out) both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--space-unit) * 1.5);
    padding: calc(var(--space-unit) * 2) calc(var(--space-unit) * 4);
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s var(--ease-out);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-primary-dim);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: var(--color-primary);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-loader {
    display: none;
}

.btn.loading .btn-text {
    opacity: 0;
}

.btn.loading .btn-loader {
    display: block;
    position: absolute;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Hero Visual - Workflow Diagram */
.hero-visual {
    animation: fadeIn 1s 0.6s var(--ease-out) both;
}

.workflow-diagram {
    display: flex;
    flex-direction: column;
    gap: calc(var(--space-unit) * 3);
    padding: calc(var(--space-unit) * 6);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    position: relative;
}

.workflow-node {
    display: flex;
    align-items: center;
    gap: calc(var(--space-unit) * 2);
    padding: calc(var(--space-unit) * 3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    animation: slideInRight 0.6s var(--ease-out) both;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
}

.node-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dim) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 20px;
    color: var(--color-bg);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
}

.workflow-node span {
    font-weight: 600;
    font-size: 18px;
}

.workflow-connection {
    height: 32px;
    width: 2px;
    background: var(--color-primary);
    margin-left: calc(var(--space-unit) * 6);
    position: relative;
    animation: growLine 0.4s var(--ease-out) both;
}

@keyframes growLine {
    from {
        height: 0;
        opacity: 0;
    }
}

.workflow-connection::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    transform: translateX(-50%);
    animation: pulse 2s infinite;
}

/* Features Section */
.features {
    position: relative;
    z-index: 1;
    padding: var(--section-padding) 0;
}

.features-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 calc(var(--space-unit) * 4);
}

.section-header {
    text-align: center;
    margin-bottom: calc(var(--space-unit) * 10);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: calc(var(--space-unit) * 3);
    letter-spacing: -0.01em;
}

.section-description {
    font-size: 20px;
    color: var(--color-text-dim);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: calc(var(--space-unit) * 4);
}

.feature-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: calc(var(--space-unit) * 5);
    transition: all 0.4s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, transparent 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--ease-out);
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 212, 255, 0.15);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 168, 204, 0.1) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: calc(var(--space-unit) * 3);
    color: var(--color-primary);
}

.feature-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: calc(var(--space-unit) * 2);
}

.feature-description {
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: calc(var(--space-unit) * 3);
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--space-unit) * 1.5);
}

.feature-tags span {
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-primary);
    padding: calc(var(--space-unit) * 0.75) calc(var(--space-unit) * 1.5);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
}

/* Use Cases Section */
.use-cases {
    position: relative;
    z-index: 1;
    padding: var(--section-padding) 0;
    background: var(--color-bg-elevated);
}

.use-cases-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 calc(var(--space-unit) * 4);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--space-unit) * 4);
}

.use-case {
    padding: calc(var(--space-unit) * 4);
    position: relative;
}

.use-case-number {
    font-family: var(--font-display);
    font-size: 64px;
    font-weight: 800;
    color: rgba(0, 212, 255, 0.1);
    line-height: 1;
    margin-bottom: calc(var(--space-unit) * 2);
}

.use-case h3 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: calc(var(--space-unit) * 2);
}

.use-case p {
    color: var(--color-text-dim);
    line-height: 1.7;
}

/* Contact Section */
.contact {
    position: relative;
    z-index: 1;
    padding: var(--section-padding) 0;
}

.contact-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--space-unit) * 4);
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: calc(var(--space-unit) * 10);
    align-items: start;
}

.contact-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    margin-bottom: calc(var(--space-unit) * 3);
}

.contact-description {
    font-size: 18px;
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: calc(var(--space-unit) * 5);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: calc(var(--space-unit) * 3);
}

.info-item {
    display: flex;
    gap: calc(var(--space-unit) * 2);
    align-items: flex-start;
}

.info-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.info-item div {
    display: flex;
    flex-direction: column;
    gap: calc(var(--space-unit) * 0.5);
}

.info-item strong {
    font-weight: 600;
    color: var(--color-text);
}

.info-item span {
    font-size: 14px;
    color: var(--color-text-dim);
}

/* Contact Form */
.contact-form {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: calc(var(--space-unit) * 6);
}

.form-status {
    padding: calc(var(--space-unit) * 2);
    border-radius: 12px;
    margin-bottom: calc(var(--space-unit) * 3);
    display: none;
    font-size: 14px;
    font-weight: 500;
}

.form-status.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.form-group {
    margin-bottom: calc(var(--space-unit) * 3);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: calc(var(--space-unit) * 1);
    color: var(--color-text);
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: calc(var(--space-unit) * 2);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--color-text);
    transition: all 0.3s var(--ease-out);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

/* Footer */
.footer {
    position: relative;
    z-index: 1;
    padding: calc(var(--space-unit) * 8) 0 calc(var(--space-unit) * 4);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 calc(var(--space-unit) * 4);
}

.footer-content {
    display: flex;
    align-items: center;
    gap: calc(var(--space-unit) * 2);
    margin-bottom: calc(var(--space-unit) * 6);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: calc(var(--space-unit) * 1.5);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.footer-text {
    color: var(--color-text-dim);
    font-size: 14px;
}

.footer-bottom {
    padding-top: calc(var(--space-unit) * 4);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-dimmer);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: calc(var(--space-unit) * 6);
    }

    .hero-visual {
        order: -1;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: calc(var(--space-unit) * 6);
    }

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

@media (max-width: 640px) {
    .nav-links {
        gap: calc(var(--space-unit) * 2);
    }

    .nav-links a:not(.nav-cta) {
        display: none;
    }

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

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .workflow-diagram {
        padding: calc(var(--space-unit) * 3);
    }
}