/* ============================================
   CSS Variables - Color Palette
   ============================================ */
:root {
    /* Primary Colors */
    --color-primary: #0E8F6A;
    --color-primary-hover: #0B7E5E;
    --color-primary-pressed: #096D52;
    --color-primary-subtle: #58C3A4;
    
    /* Secondary & Accent */
    --color-secondary: #1595D3;
    --color-accent: #9CD44D;
    
    /* Dark UI Neutrals */
    --color-bg: #0B0E12;
    --color-surface: #151A21;
    --color-card: #1A2028;
    --color-border: #2A323C;
    
    /* Text */
    --color-text-high: #FFFFFF;
    --color-text-muted: #A9B1BC;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-high);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

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

/* ============================================
   Header & Navigation
   ============================================ */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(11, 14, 18, 0.95);
    backdrop-filter: blur(10px);
    transition: background-color 1200ms cubic-bezier(0.4, 0, 0.2, 1), backdrop-filter 1200ms cubic-bezier(0.4, 0, 0.2, 1);
}

header.scrolled {
    background-color: rgba(11, 14, 18, 0.3);
    backdrop-filter: blur(20px);
}

header.scrolled .logo {
    /* Transform will be set dynamically by JavaScript */
}

header.scrolled .cta-button {
    opacity: 1;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
    position: relative;
    min-height: 100px;
}

.logo {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.02em;
    transform: translateX(0);
    transition: transform 1200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-button {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: var(--color-primary);
    color: var(--color-text-high);
    text-decoration: none;
    border-radius: 50px;
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 12px rgba(14, 143, 106, 0.3);
    transition: all var(--transition-normal);
}

.cta-button:hover {
    background-color: var(--color-primary-hover);
    box-shadow: 0 6px 20px rgba(14, 143, 106, 0.4);
    transform: translateY(-2px);
}

.cta-button:active {
    background-color: var(--color-primary-pressed);
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(14, 143, 106, 0.3);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-top: 70px;
    background: 
        linear-gradient(135deg, transparent 0%, transparent 100%),
        linear-gradient(45deg, rgba(14, 143, 106, 0.03) 1px, transparent 1px),
        linear-gradient(-45deg, rgba(21, 149, 211, 0.02) 1px, transparent 1px),
        linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
    background-size: 100% 100%, 60px 60px, 60px 60px, 100% 100%;
    background-position: 0 0, 0 0, 0 0, 0 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 800px;
    height: 800px;
    border: 2px solid rgba(14, 143, 106, 0.12);
    border-radius: 50%;
    pointer-events: none;
    filter: blur(2px);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 600px;
    height: 600px;
    border: 2px solid rgba(21, 149, 211, 0.1);
    border-radius: 50%;
    pointer-events: none;
    filter: blur(2px);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero .container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -20%;
    width: 400px;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(156, 212, 77, 0.25), transparent);
    transform: rotate(-15deg);
    pointer-events: none;
    filter: blur(1.5px);
}

.hero .container::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -10%;
    width: 300px;
    height: 300px;
    border: 1px solid rgba(21, 149, 211, 0.15);
    border-radius: 50%;
    pointer-events: none;
    filter: blur(1.5px);
}

.hero-title {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}


/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
}

.contact-content {
    max-width: 650px;
    margin: 0 auto;
}

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

.contact-header h2 {
    margin-bottom: var(--spacing-sm);
}

.contact-header p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* ============================================
   Form Styles
   ============================================ */
.contact-form {
    background-color: var(--color-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-high);
    font-weight: var(--font-weight-medium);
}

.required {
    color: var(--color-accent);
}

.optional {
    color: var(--color-text-muted);
    font-weight: var(--font-weight-normal);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-high);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 143, 106, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-button {
    width: 100%;
    padding: 0.875rem;
    background-color: var(--color-primary);
    color: var(--color-text-high);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.submit-button:hover {
    background-color: var(--color-primary-hover);
}

.submit-button:active {
    background-color: var(--color-primary-pressed);
    transform: scale(0.98);
}

.submit-button:disabled {
    background-color: var(--color-border);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-status {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: var(--font-weight-medium);
    display: none;
}

.form-status.success {
    display: block;
    background-color: rgba(14, 143, 106, 0.15);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.form-status.error {
    display: block;
    background-color: rgba(255, 82, 82, 0.15);
    color: #ff5252;
    border: 1px solid #ff5252;
}

/* ============================================
   Footer
   ============================================ */
footer {
    padding: var(--spacing-md) 0;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

footer p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .hero {
        min-height: 70vh;
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    nav {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .about, .contact {
        padding: var(--spacing-lg) 0;
    }
}