/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    transition:
        background-color var(--duration-base) var(--ease-soft),
        backdrop-filter var(--duration-base) var(--ease-soft),
        border-color var(--duration-base) var(--ease-soft),
        box-shadow var(--duration-base) var(--ease-soft);
}

.site-header--scrolled {
    background-color: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: var(--space-sm);
}

.site-logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.04em;
    z-index: 101;
}

.site-logo:hover {
    color: var(--champagne);
}

.site-header__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0.5rem;
    z-index: 101;
}

@media (min-width: 900px) {
    .site-header__toggle {
        display: none;
    }
}

.site-header__toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 1px;
    transition: transform var(--duration-base) var(--ease-out),
                opacity var(--duration-fast) var(--ease-soft);
}

.site-header--open .site-header__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header--open .site-header__toggle-bar:nth-child(2) {
    opacity: 0;
}

.site-header--open .site-header__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    background-color: rgba(7, 12, 24, 0.94);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-base) var(--ease-soft),
                visibility var(--duration-base) var(--ease-soft);
    z-index: 100;
}

.site-header--open .site-nav {
    opacity: 1;
    visibility: visible;
}

@media (min-width: 900px) {
    .site-nav {
        position: static;
        flex-direction: row;
        align-items: center;
        gap: var(--space-md);
        background: none;
        backdrop-filter: none;
        opacity: 1;
        visibility: visible;
        inset: auto;
    }
}

.site-nav__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

@media (min-width: 900px) {
    .site-nav__list {
        flex-direction: row;
        gap: var(--space-md);
    }
}

.site-nav__link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.0625rem;
    font-weight: 500;
    padding: 0.375rem 0.5rem;
    transition: color var(--duration-fast) var(--ease-soft);
}

@media (min-width: 900px) {
    .site-nav__link {
        font-size: 0.9375rem;
    }
}

.site-nav__link:hover {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9375rem 1.75rem;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    position: relative;
    transition:
        background var(--duration-base) var(--ease-soft),
        border-color var(--duration-base) var(--ease-soft),
        color var(--duration-fast) var(--ease-soft),
        box-shadow var(--duration-base) var(--ease-soft),
        transform var(--duration-fast) var(--ease-soft),
        filter var(--duration-base) var(--ease-soft);
}

@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: background var(--duration-fast) var(--ease-soft),
                    border-color var(--duration-fast) var(--ease-soft),
                    color var(--duration-fast) var(--ease-soft),
                    box-shadow var(--duration-fast) var(--ease-soft);
    }
}

.btn--primary {
    background: linear-gradient(
        135deg,
        rgba(91, 154, 255, 0.95) 0%,
        rgba(59, 91, 219, 0.9) 50%,
        rgba(123, 92, 240, 0.85) 100%
    );
    color: var(--text-primary);
    border-color: rgba(120, 170, 255, 0.45);
    box-shadow:
        0 4px 24px rgba(91, 154, 255, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.08) inset,
        0 1px 0 rgba(255, 255, 255, 0.12) inset;
}

.btn--primary:hover {
    color: var(--text-primary);
    filter: brightness(1.08);
    box-shadow:
        0 6px 32px rgba(91, 154, 255, 0.4),
        0 0 48px rgba(123, 92, 240, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.btn--glow {
    overflow: visible;
}

.btn--glow::after {
    content: "";
    position: absolute;
    inset: -3px;
    border-radius: inherit;
    background: linear-gradient(
        135deg,
        rgba(91, 154, 255, 0.4),
        rgba(123, 92, 240, 0.25)
    );
    opacity: 0.35;
    filter: blur(12px);
    z-index: -1;
    transition: opacity var(--duration-base) var(--ease-soft);
}

.btn--glow:hover::after {
    opacity: 0.6;
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border-color: var(--border-subtle);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn--ghost:hover {
    color: var(--text-primary);
    border-color: rgba(180, 191, 208, 0.22);
    background: rgba(255, 255, 255, 0.06);
}

.btn--header {
    padding: 0.625rem 1.125rem;
    font-size: 0.8125rem;
    background: linear-gradient(
        135deg,
        rgba(214, 185, 120, 0.95) 0%,
        rgba(196, 165, 94, 0.9) 100%
    );
    color: var(--background-deep);
    border: 1px solid rgba(214, 185, 120, 0.4);
    box-shadow:
        0 2px 12px rgba(214, 185, 120, 0.2),
        0 0 20px rgba(91, 154, 255, 0.08);
}

.btn--header:hover {
    color: var(--background-deep);
    filter: brightness(1.06);
    box-shadow:
        0 4px 20px rgba(214, 185, 120, 0.3),
        0 0 24px rgba(91, 154, 255, 0.12);
}

.btn--auto-section {
    width: 100%;
    font-size: 1.0625rem;
    padding: 1.1875rem 1.75rem;
    gap: 0.625rem;
}

@media (min-width: 480px) {
    .btn--auto-section {
        width: auto;
        min-width: 18.5rem;
    }
}

.btn__arrow {
    font-size: 1.125rem;
    line-height: 1;
    opacity: 0.88;
    transition: transform var(--duration-base) var(--ease-out);
}

.btn--auto-section:hover .btn__arrow {
    transform: translateX(3px);
}

.btn--hero {
    width: 100%;
    font-size: 1rem;
    padding: 1.125rem 1.5rem;
}

@media (min-width: 480px) {
    .btn--hero {
        width: auto;
        min-width: 17rem;
    }
}

.btn--hero-secondary {
    width: 100%;
}

@media (min-width: 480px) {
    .btn--hero-secondary {
        width: auto;
    }
}

.btn--cta-large {
    width: 100%;
    max-width: 24rem;
    font-size: 1.0625rem;
    padding: 1.1875rem 2rem;
}

@media (min-width: 480px) {
    .btn:not(:hover) {
        transform: none;
    }

    .btn:hover {
        transform: translateY(-2px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn:hover {
        transform: none;
    }

    .btn--auto-section:hover .btn__arrow {
        transform: none;
    }
}