/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { overflow-x: hidden; }

/* ── Buttons ── */
.btn-primary {
    background: linear-gradient(135deg, #C0603A 0%, #A84E2E 100%);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary {
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

/* ── Navbar ── */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(253, 251, 247, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #C0603A;
    border-radius: 1px;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* ── Mobile Menu ── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.open .mobile-link {
    animation: fadeDown 0.4s ease forwards;
    opacity: 0;
}

#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Hamburger ── */
.menu-line {
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

#menu-toggle[aria-expanded="true"] .menu-line:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
}
#menu-toggle[aria-expanded="true"] .menu-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
#menu-toggle[aria-expanded="true"] .menu-line:nth-child(3) {
    transform: translateY(-4px) rotate(-45deg);
    width: 5rem;
}

/* ── Menu Tabs ── */
.menu-tab {
    background: transparent;
    color: #78716c;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.menu-tab.active {
    background: #C0603A;
    color: #FDFBF7;
    box-shadow: 0 4px 12px rgba(192, 96, 58, 0.3);
}

.menu-tab:not(.active):hover {
    background: #F5ECDA;
    color: #C0603A;
}

/* ── Scroll Reveal ── */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Back to Top ── */
#back-to-top.visible {
    opacity: 1;
    translate: 0;
    pointer-events: all;
}

/* ── Focus Styles ── */
:focus-visible {
    outline: 2px solid #C0603A;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ── Selection ── */
::selection {
    background: rgba(192, 96, 58, 0.15);
    color: #5D2C1F;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}

/* ── Responsive Tweaks ── */
@media (max-width: 640px) {
    .font-serif { line-height: 1.1; }
}