:root {
    --color-bg: #ffffff;
    --color-text: #111827;
    --color-text-dim: #4b5563;
    --color-border: #e5e7eb;
    --color-card-bg: #ffffff;
    --color-primary: #eab308; /* Yellow as requested */
    --color-primary-hover: #ca8a04;
    --color-dark: #1f2937;
    --color-dark-hover: #111827;
    --color-accent: #4f46e5; /* Indigo for some subtle tech vibes in stats */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    overflow-x: hidden;
    line-height: 1.6;
}

::selection {
    background: var(--color-primary);
    color: #fff;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: var(--color-bg);
    position: relative;
    z-index: 100;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
}

.logo .highlight {
    color: var(--color-primary); /* Convrs in yellow */
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 2rem;
    }
    .nav-links a {
        text-decoration: none;
        color: var(--color-text);
        font-weight: 500;
        font-size: 0.95rem;
        transition: color 0.2s;
    }
    .nav-links a:hover {
        color: var(--color-primary);
    }
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-outline {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    transition: all 0.2s;
}

.btn-outline:hover {
    border-color: var(--color-text);
}

.btn-solid {
    text-decoration: none;
    color: #fff;
    background: var(--color-dark);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    transition: all 0.2s;
}

.btn-solid:hover {
    background: var(--color-dark-hover);
}

/* Hero Section */
.hero-section {
    padding: 4rem 5% 2rem;
    position: relative;
    overflow: hidden;
    min-height: 80vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.hero-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
    position: relative;
    z-index: 10;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-dim);
    margin: 0 auto 2.5rem;
    max-width: 650px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn-primary {
    text-decoration: none;
    background: var(--color-dark);
    color: #fff;
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--color-dark-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    text-decoration: none;
    background: #fff;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-secondary:hover {
    border-color: var(--color-text);
    background: #f9fafb;
}

/* Visualization Area & Floating Stats */
.visualization-area {
    position: relative;
    min-height: 500px;
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.connection-lines {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1000px;
    height: 600px;
    pointer-events: none;
    z-index: 1;
}

.stat-card {
    position: absolute;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    z-index: 5;
    min-width: 180px;
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.stat-title {
    font-size: 0.875rem;
    color: var(--color-text-dim);
    font-weight: 500;
}

.stat-trend.positive {
    color: #10b981;
    font-size: 0.75rem;
    background: #ecfdf5;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-weight: 600;
}

.stat-trend.negative {
    color: #ef4444;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.stat-value.highlight-blue {
    color: var(--color-accent);
}

.stat-sub {
    font-size: 0.75rem;
    color: #9ca3af;
}

.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 40px;
    margin: 0.5rem 0;
}

.bar {
    width: 20px;
    border-radius: 2px 2px 0 0;
    background: var(--color-accent);
    opacity: 0.8;
}

.stat-card.small {
    padding: 1rem;
    min-width: 120px;
}

.stat-card.small .stat-value {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary); /* Yellow accent inside stat card */
}

/* Center Demo Form */
.center-form-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.clean-card {
    background: var(--color-card-bg);
    border: 2px solid var(--color-accent);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 0 25px rgba(79, 70, 229, 0.15), 0 20px 25px -5px rgba(0, 0, 0, 0.05);
}

.card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.card-header p {
    color: var(--color-text-dim);
    font-size: 0.875rem;
}

.lead-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-row {
    display: flex;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
}

.input-group.full-width {
    flex: 100%;
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-dim);
}

.input-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: #f9fafb;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.2s ease;
    outline: none;
}

.input-group input:focus {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(234, 179, 8, 0.15); /* Yellow focus ring */
}

.submit-btn {
    margin-top: 0.5rem;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    background: var(--color-primary); /* Yellow submit button per requirements */
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.submit-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

/* Button Loading State */
.btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top-color: var(--color-text);
    animation: spin 1s ease-in-out infinite;
    position: absolute;
}

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

.submit-btn.loading .btn-text {
    opacity: 0;
}
.submit-btn.loading .btn-loader {
    display: block;
}

.form-status {
    text-align: center;
    font-size: 0.875rem;
    min-height: 20px;
    margin-top: 0.25rem;
}

.status-success {
    color: #10b981;
    font-weight: 500;
}

/* Responsiveness */
@media (max-width: 1024px) {
    .stat-card {
        display: none !important; /* Hide floating stats on smaller screens for cleanliness */
    }
    .connection-lines {
        display: none;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.25rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
    }
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }
    .input-row {
        flex-direction: column;
        gap: 1rem;
    }
    .clean-card {
        padding: 1.5rem;
        border-radius: 16px;
    }
}