/* CSS Variables */
:root {
    --color-bg: #FAFAF9;
    --color-white: #FFFFFF;
    --color-text-main: #1C1917;
    /* stone-900 */
    --color-text-muted: #57534E;
    /* stone-600 */
    --color-text-light: #A8A29E;
    /* stone-400 */

    --color-brand-mint: #99F6E4;
    /* teal-200 approx */
    --color-brand-mint-light: #CCFBF1;
    --color-brand-sky: #BAE6FD;
    /* sky-200 */
    --color-brand-accent: #0F766E;
    /* teal-700 */

    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius-lg: 1rem;
    --border-radius-xl: 2rem;
    --border-radius-full: 9999px;

    --container-width: 1280px;
}

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

html {
    scroll-behavior: smooth;
}

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

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    color: var(--color-text-main);
    line-height: 1.2;
}

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

.text-muted {
    color: var(--color-text-muted);
}

.font-serif {
    font-family: var(--font-serif);
}

.uppercase-tracking {
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: var(--spacing-lg) 0;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

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

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .section {
        padding: var(--spacing-xl) 0;
    }

    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .text-center-md {
        text-align: center;
    }
}

/* Components */

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background-color: var(--color-brand-accent);
    color: var(--color-white);
}

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

.btn-secondary {
    background-color: var(--color-text-main);
    color: var(--color-white);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-text-main);
    color: var(--color-text-main);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: background-color 0.3s, box-shadow 0.3s, padding 0.3s;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 2rem;
    }

    .mobile-menu-btn {
        display: none;
    }
}

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

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

/* Hero */
.hero {
    position: relative;
    padding-top: 8rem;
    padding-bottom: 4rem;
    overflow: hidden;
}

.hero-bg-decor {
    position: absolute;
    z-index: -1;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.hero-image-wrapper {
    position: relative;
    border-radius: 3rem;
    overflow: hidden;
    border: 8px solid var(--color-white);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.status-badge {
    position: absolute;
    bottom: -1.5rem;
    right: -1.5rem;
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    display: none;
}

@media (min-width: 768px) {
    .status-badge {
        display: block;
    }
}

/* Cards */
.card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    border: 1px solid #E5E5E5;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

/* Signals Section */
.signal-list li {
    background: rgba(255, 255, 255, 0.5);
    padding: 1rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.dot {
    width: 0.5rem;
    height: 0.5rem;
    background-color: var(--color-brand-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text-light);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #E5E5E5;
    border-radius: 1rem;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-brand-mint);
    box-shadow: 0 0 0 3px rgba(153, 246, 228, 0.2);
}

/* Footer */
.footer {
    background-color: var(--color-text-main);
    color: #D6D3D1;
    padding-top: 5rem;
    padding-bottom: 3rem;
}

.footer h3 {
    color: var(--color-white);
}

.footer-links li {
    margin-bottom: 0.75rem;
}

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

.social-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    transition: background 0.3s;
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    z-index: 999;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu a {
    font-size: 1.5rem;
    font-family: var(--font-serif);
    color: var(--color-text-main);
}