:root {
    /* Planzilla Brand Colors — planning / clarity */
    --primary-color: #0f172a;
    --secondary-color: #1e293b;
    --accent-color: #0d9488;
    --accent-glow: rgba(13, 148, 136, 0.45);
    --text-color: #e2e8f0;
    --muted-color: #94a3b8;
    --heading-color: #ffffff;
    --card-bg: #162033;
    --font-main: "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
    --container-width: 1100px;
}

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

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

h1, h2, h3, h4 {
    color: var(--heading-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.25rem;
}

h2 {
    font-size: 1.8rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    opacity: 0.9;
}

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

header {
    background: rgba(15, 23, 42, 0.96);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(13, 148, 136, 0.25);
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    position: relative;
}

header nav a.logo {
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.4px;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    transition: none;
}

header nav a.logo .logo-wordmark {
    background-image: linear-gradient(135deg, #ffffff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(13, 148, 136, 0.55);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.92);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle-line {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--accent-color);
    border-radius: 2px;
}

.language-selector {
    position: relative;
}

.language-selector summary {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 34px;
    padding: 0.25rem 0.65rem;
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    list-style: none;
}

.language-selector summary::-webkit-details-marker {
    display: none;
}

.language-selector summary::after {
    content: "▾";
    color: var(--muted-color);
    font-size: 0.75rem;
}

.language-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 150px;
    padding: 0.4rem;
    border: 1px solid rgba(13, 148, 136, 0.3);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.99);
    z-index: 1200;
}

.language-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    color: var(--text-color);
}

.language-menu a:hover,
.language-menu a[aria-current="page"] {
    background: rgba(13, 148, 136, 0.14);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(13, 148, 136, 0.18), transparent 50%),
        linear-gradient(160deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.hero-content {
    max-width: 720px;
}

.hero .slogan {
    font-size: 1.15rem;
    color: var(--muted-color);
    margin-bottom: 2rem;
    max-width: 36rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.5rem;
    border-radius: 8px;
    background: var(--accent-color);
    color: #fff;
    font-weight: 600;
    border: none;
}

.btn:hover {
    opacity: 0.92;
    color: #fff;
}

.btn-secondary {
    background: transparent;
    border: 1px solid rgba(13, 148, 136, 0.55);
    color: var(--text-color);
}

.section {
    padding: 4.5rem 0;
}

.section-muted {
    background: var(--secondary-color);
}

.placeholder-note {
    color: var(--muted-color);
    max-width: 40rem;
}

footer {
    border-top: 1px solid rgba(13, 148, 136, 0.2);
    padding: 2.5rem 0 1.5rem;
    background: #0b1220;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--accent-color);
}

.footer-column p,
.footer-column li {
    color: var(--muted-color);
    font-size: 0.95rem;
}

.footer-column ul {
    list-style: none;
}

.footer-bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding-top: 1rem;
    color: var(--muted-color);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .nav-toggle {
        display: inline-flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 0.5rem);
        right: 0;
        left: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        padding: 0.75rem;
        background: rgba(15, 23, 42, 0.98);
        border: 1px solid rgba(13, 148, 136, 0.25);
        border-radius: 10px;
    }

    .main-nav.nav-open .nav-links {
        display: flex;
    }

    .language-menu {
        position: static;
        margin-top: 0.35rem;
        box-shadow: none;
    }
}