/* ── Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: #a8e6cf;
    color: #0a1628;
}

/* ── Navigation ── */
.nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(10, 22, 40, 0.06);
    transition: box-shadow 0.4s ease, background 0.4s ease;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 1px 40px rgba(10, 22, 40, 0.06);
}

.nav.scrolled .nav-logo {
    color: #0a1628;
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #a8e6cf;
    transition: width 0.3s ease;
}

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

/* Mobile toggle */
.nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-bar {
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.nav-toggle.active .nav-bar:nth-child(1) {
    transform: rotate(45deg) translate(3px, 3px);
}

.nav-toggle.active .nav-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.active .nav-bar:nth-child(3) {
    width: 24px;
    transform: rotate(-45deg) translate(3px, -3px);
}

.mobile-nav-link {
    position: relative;
    display: block;
    padding: 8px 0;
}

/* ── Scroll Reveal ── */
[data-reveal] {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: no-preference) {
    [data-reveal] {
        opacity: 0;
        transform: translateY(28px);
    }

    [data-reveal].revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger children */
[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal-delay="4"] { transition-delay: 0.4s; }

/* ── Flavor Cards ── */
.flavor-card {
    position: relative;
    overflow: hidden;
}

.flavor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #a8e6cf, transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.flavor-card:hover::before {
    opacity: 1;
}

/* ── Process Steps ── */
.process-step {
    position: relative;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 20px;
    bottom: -10px;
    width: 1px;
    height: 20px;
    background: rgba(168, 230, 207, 0.3);
}

.process-step:last-child::after {
    display: none;
}

/* ── Form ── */
input:focus,
textarea:focus {
    outline: none;
}

/* ── Responsive ── */
@media (max-width: 767px) {
    .nav-mobile {
        animation: slideDown 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Utility ── */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .flavor-card {
        transition: none;
    }

    .flavor-card::before {
        transition: none;
    }
}