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

:root {
    /* Primary Brand Colors (Ocean Blue) */
    --primary: #0ea5e9;
    --primary-hover: #0284c7;
    --primary-light: #bae6fd;
    --primary-muted: #7dd3fc;
    --primary-dark: #0369a1;
    
    /* Accent Colors (Warm Sunset) */
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --accent-light: #fde68a;
    
    /* Semantic Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    
    /* Background & Surface Colors */
    --bg: #ffffff;
    --bg-subtle: #f8fafc;
    --bg-muted: #f1f5f9;
    --surface: #ffffff;
    --surface-hover: #f8fafc;
    
    /* Border Colors */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --border-strong: #cbd5e1;
    
    /* Text Colors */
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Shadows */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
        padding: 0 2rem;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1400px;
        padding: 0 3rem;
    }
}

/* Header */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

nav {
    padding: 1rem 0;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 6px -1px rgba(14, 165, 233, 0.3);
    color: var(--text-inverse);
    flex-shrink: 0;
}

.logo-icon svg {
    width: 1.5rem;
    height: 1.5rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
}

.logo-text-accent {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}

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

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
    position: relative;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        max-width: 85vw;
        height: 100vh;
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem 2rem 2rem;
        gap: 0;
        box-shadow: -4px 0 6px -1px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, opacity 0.3s ease;
        z-index: 100;
        overflow-y: auto;
        transform: translateX(100%);
        opacity: 0;
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateX(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav-links a {
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border);
        font-size: 1rem;
        display: block;
    }
    
    .nav-links .btn-primary {
        margin-top: 1rem;
        width: 100%;
        text-align: center;
    }
    
    body.menu-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

@media (max-width: 640px) {
    .btn-large {
        padding: 1rem 1.5rem;
        font-size: 1rem;
        width: 100%;
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-muted) 100%);
    color: var(--text-inverse);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 120'%3E%3Cpath fill='%23ffffff' fill-opacity='0.2' d='M0,64L48,69.3C96,75,192,85,288,90.7C384,96,480,96,576,85.3C672,75,768,53,864,48C960,43,1056,53,1152,58.7C1248,64,1344,64,1392,64L1440,64L1440,120L1392,120C1344,120,1248,120,1152,120C1056,120,960,120,864,120C768,120,672,120,576,120C480,120,384,120,288,120C192,120,96,120,48,120L0,120Z'%3E%3C/path%3E%3C/svg%3E") no-repeat bottom center;
    background-size: cover;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

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

.hero .btn-primary {
    background: var(--text-inverse);
    color: var(--primary);
    box-shadow: var(--shadow-xl);
}

.hero .btn-primary:hover {
    background: var(--bg-subtle);
    transform: translateY(-2px);
}

.hero .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-inverse);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--text-inverse);
}

@media (max-width: 768px) {
    .hero {
        padding: 4rem 0;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (min-width: 1024px) {
    .hero {
        padding: 8rem 0;
    }
    
    .hero h1 {
        font-size: 4rem;
    }
    
    .hero-subtitle {
        font-size: 1.375rem;
        max-width: 800px;
    }
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--bg-subtle);
}

.features h2 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: var(--text);
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

@media (min-width: 1024px) {
    .features {
        padding: 6rem 0;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2.5rem;
    }
}

/* Waterways Section */
.waterways {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-muted) 100%);
}

.waterways h2 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
    color: var(--text);
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.waterways-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.waterway-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--primary-light);
    text-align: center;
    transition: all 0.3s ease;
}

.waterway-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.waterway-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
    font-weight: 600;
}

.waterway-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 5rem 0;
    text-align: center;
    background: var(--bg);
}

.about h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 2rem;
    color: var(--text);
    font-weight: 700;
}

.about p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 1.5rem;
    line-height: 1.8;
}

.about-cta {
    margin-top: 2.5rem;
}

@media (min-width: 1024px) {
    .about {
        padding: 6rem 0;
    }
    
    .about p {
        font-size: 1.25rem;
    }
}

/* Footer */
footer {
    background: var(--text);
    color: var(--text-inverse);
    padding: 2.5rem 0;
    margin-top: 4rem;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
}

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

@media (max-width: 768px) {
    footer .container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}