header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: rgba(26, 30, 34, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);

    /* on page load / reload */
    animation: fadeDown 0.6s ease both;
}

header h1 {
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--color-sage-light);
    text-transform: uppercase;
}

/* temporary placeholder logo */
header h1::before {
    content: '◈ ';
    color: var(--color-sage-dark);
    font-size: 1.5rem;
}

nav {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

nav a {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-slate-light);
    padding-bottom: 2px;
    position: relative;
    transition: color var(--transition);
}

nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background: var(--color-sage);
    transition: width var(--transition);
}

nav a:hover {
    color: var(--color-sage-light);
}

nav a:hover::after {
    width: 100%;
}

.hero {
    position: relative;
    min-height: calc(100vh - 65px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: var(--space-xl);
}

.hero img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
    opacity: 0.5;
    filter: saturate(0.6);
    transition: opacity 1s ease;
}

/* dark gradient to make hero legible */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        radial-gradient(ellipse 80% 60% at 50% 60%, rgba(127, 168, 130, 0.07) 0%, transparent 70%),
        linear-gradient(to bottom,
            rgba(26, 30, 34, 0.35) 0%,
            rgba(26, 30, 34, 0.55) 60%,
            rgba(26, 30, 34, 0.75) 100%);
}

.hero h2 {
    position: relative;
    z-index: 2;
    font-family: var(--font-hero);
    font-size: clamp(2.6rem, 4.8vw, 5rem);
    font-weight: 400;
    color: var(--color-heading);
    line-height: 1.1;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);

    animation: fadeUp 0.8s 0.3s ease both;
}

.button {
    position: relative;
    z-index: 2;
    display: inline-block;
    padding: 0.85rem 2.4rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-bg);
    background: var(--color-sage);
    border: 1px solid var(--color-sage);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
        background var(--transition),
        color var(--transition),
        box-shadow var(--transition),
        transform var(--transition);

    animation: fadeUp 0.8s 0.6s ease both;
}

.button:hover {
    background: transparent;
    color: var(--color-sage-light);
    box-shadow: 0 0 28px rgba(127, 168, 130, 0.25), inset 0 0 0 1px var(--color-sage);
    transform: translateY(-2px);
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@media (max-width: 640px) {
    header {
        padding: var(--space-md) var(--space-lg);
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    nav {
        gap: var(--space-md);
    }

    .hero {
        padding: var(--space-lg);
    }
}