/* ReefBuddy - New Brutalist Design System */

/* ==========================================================================
   CSS Variables - Based on Mobile App Design
   ========================================================================== */
:root {
    /* Colors */
    --white: #FFFFFF;
    --black: #000000;
    --aquamarine: #00FFD1;
    --orange: #FF3D00;

    /* Typography */
    --font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;

    /* Borders */
    --border-width: 3px;
    --border-thick: 4px;

    /* Shadows - Hard offset, no blur */
    --shadow: 5px 5px 0 var(--black);
    --shadow-sm: 3px 3px 0 var(--black);
    --shadow-lg: 8px 8px 0 var(--black);
    --shadow-aqua: 5px 5px 0 var(--aquamarine);

    /* Transitions */
    --transition: 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--white);
    color: var(--black);
    line-height: 1.5;
    font-size: 16px;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
    font-size: 1.125rem;
    line-height: 1.6;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: var(--border-width) solid var(--black);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--black);
}

.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0 var(--black);
}

.btn-primary {
    background-color: var(--aquamarine);
    color: var(--black);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--black);
    box-shadow: var(--shadow);
}

.btn-secondary:hover {
    background-color: var(--black);
    color: var(--white);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--white);
    border-bottom: var(--border-width) solid var(--black);
    transition: box-shadow var(--transition);
}

.nav.scrolled {
    box-shadow: 0 5px 0 var(--black);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    transition: color var(--transition);
}

.nav-links a:hover {
    color: var(--aquamarine);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
}

.nav-cta {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--aquamarine);
    border: var(--border-width) solid var(--black);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0 var(--black);
    color: var(--black) !important;
    text-decoration: none !important;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 3px;
    background-color: var(--black);
    transition: transform var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--white);
        border-bottom: var(--border-width) solid var(--black);
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition), opacity var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    padding-top: 80px;
    border-bottom: var(--border-thick) solid var(--black);
}

.hero-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-3xl);
}

.hero-badge {
    display: inline-block;
    width: fit-content;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--aquamarine);
    border: var(--border-width) solid var(--black);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 500px;
    margin-bottom: var(--spacing-xl);
    color: #333;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-3xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: #666;
}

/* Hero Visual - Phone Mockup */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--aquamarine);
    padding: var(--spacing-2xl);
}

.phone-mockup {
    width: 280px;
    background-color: var(--black);
    padding: var(--spacing-sm);
    border: var(--border-thick) solid var(--black);
    box-shadow: var(--shadow-lg);
}

.phone-screen {
    background-color: var(--white);
    padding: var(--spacing-md);
}

.app-header {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding-bottom: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--black);
    margin-bottom: var(--spacing-md);
}

.app-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.param-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border: var(--border-width) solid var(--black);
    box-shadow: var(--shadow-sm);
}

.param-name {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.param-value {
    font-size: 0.875rem;
    font-weight: 700;
}

.param-good {
    background-color: var(--aquamarine);
}

.param-warning {
    background-color: var(--orange);
    color: var(--white);
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .hero-container {
        padding: var(--spacing-2xl);
        order: 2;
    }

    .hero-visual {
        order: 1;
        padding: var(--spacing-2xl) var(--spacing-lg);
        min-height: 400px;
    }
}

@media (max-width: 480px) {
    .hero-container {
        padding: var(--spacing-lg);
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }
}

/* ==========================================================================
   Section Styles
   ========================================================================== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4xl) var(--spacing-lg);
}

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

.section-subtitle {
    text-align: center;
    color: #666;
    max-width: 600px;
    margin: 0 auto var(--spacing-3xl);
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features {
    border-bottom: var(--border-thick) solid var(--black);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-xl);
    border: var(--border-width) solid var(--black);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0 var(--black);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.feature-card p {
    font-size: 0.9375rem;
    color: #333;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Parameters Section
   ========================================================================== */
.parameters {
    background-color: var(--black);
    color: var(--white);
    border-bottom: var(--border-thick) solid var(--black);
}

.parameters .section-title,
.parameters .section-subtitle {
    color: var(--white);
}

.params-showcase {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.param-pill {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: transparent;
    border: var(--border-width) solid var(--white);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    transition: all var(--transition);
}

.param-pill:hover {
    background-color: var(--aquamarine);
    color: var(--black);
    border-color: var(--aquamarine);
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */
.how-it-works {
    border-bottom: var(--border-thick) solid var(--black);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.step {
    position: relative;
}

.step-number {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--aquamarine);
    -webkit-text-stroke: 2px var(--black);
    margin-bottom: var(--spacing-md);
}

.step-content h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.step-content p {
    font-size: 0.9375rem;
    color: #666;
}

@media (max-width: 1024px) {
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .steps {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing {
    background-color: #FAFAFA;
    border-bottom: var(--border-thick) solid var(--black);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    align-items: start;
}

.pricing-card {
    background-color: var(--white);
    border: var(--border-width) solid var(--black);
    box-shadow: var(--shadow);
    padding: var(--spacing-xl);
    text-align: center;
}

.pricing-featured {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.pricing-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--black);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.pricing-badge-highlight {
    background-color: var(--aquamarine);
    color: var(--black);
}

.pricing-badge-value {
    background-color: var(--orange);
    color: var(--white);
}

.pricing-amount {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.pricing-period {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: #666;
    margin-bottom: var(--spacing-lg);
}

.pricing-features {
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #EEE;
    font-size: 0.9375rem;
}

.pricing-features li::before {
    content: "+";
    font-weight: 700;
    margin-right: var(--spacing-sm);
}

.pricing-card .btn {
    width: 100%;
}

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-featured {
        transform: none;
    }
}

/* ==========================================================================
   Quote Section
   ========================================================================== */
.quote-section {
    background-color: var(--aquamarine);
    border-bottom: var(--border-thick) solid var(--black);
}

.big-quote {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    line-height: 1.3;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-2xl) 0;
}

/* ==========================================================================
   Download Section
   ========================================================================== */
.download {
    border-bottom: var(--border-thick) solid var(--black);
}

.download-cta {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.app-store-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--black);
    color: var(--white);
    border: var(--border-width) solid var(--black);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.app-store-btn:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0 var(--aquamarine);
}

.apple-icon {
    width: 32px;
    height: 32px;
}

.app-store-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.app-store-small {
    font-size: 0.625rem;
    letter-spacing: 0.05em;
}

.app-store-large {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.download-note {
    text-align: center;
    font-size: 0.875rem;
    color: #666;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--black);
    color: var(--white);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.footer-tagline {
    font-size: 0.875rem;
    color: #888;
    margin-top: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    font-size: 0.875rem;
    color: #888;
    transition: color var(--transition);
}

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

.footer-copyright {
    text-align: right;
    font-size: 0.75rem;
    color: #666;
}

@media (max-width: 768px) {
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-links {
        justify-content: center;
    }

    .footer-copyright {
        text-align: center;
    }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Selection styling */
::selection {
    background-color: var(--aquamarine);
    color: var(--black);
}

/* Focus styles for accessibility */
:focus-visible {
    outline: var(--border-width) solid var(--aquamarine);
    outline-offset: 2px;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--white);
    border-left: var(--border-width) solid var(--black);
}

::-webkit-scrollbar-thumb {
    background: var(--black);
}

::-webkit-scrollbar-thumb:hover {
    background: #333;
}