/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* ── Scroll-reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Buttons ── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    background: #0F2B4C;
    color: #fefdf8;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.875rem 1.75rem;
    border-radius: 60px;
    border: 2px solid #0F2B4C;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary:hover {
    background: #40E0D0;
    border-color: #40E0D0;
    color: #0F2B4C;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(64, 224, 208, 0.3);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    background: transparent;
    color: #0F2B4C;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.875rem 1.75rem;
    border-radius: 60px;
    border: 2px solid #d4dce6;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}
.btn-secondary:hover {
    border-color: #0F2B4C;
    background: #0F2B4C;
    color: #fefdf8;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 43, 76, 0.15);
}

/* ── Inputs ── */
.input-field {
    width: 100%;
    padding: 0.8125rem 1rem;
    border: 1.5px solid #d4dce6;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    color: #0F2B4C;
    background: #fefdf8;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}
.input-field::placeholder { color: #a8b8cc; }
.input-field:focus {
    border-color: #40E0D0;
    box-shadow: 0 0 0 3px rgba(64, 224, 208, 0.15);
}

/* ── Navbar ── */
.nav-link { position: relative; }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #40E0D0;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

/* ── Mobile menu ── */
.mobile-link { position: relative; }

/* ── Scroll indicator ── */
@media (prefers-reduced-motion: no-preference) {
    @keyframes scroll-line {
        0% { transform: translateY(-100%); }
        100% { transform: translateY(200%); }
    }
    .animate-scroll-line {
        animation: scroll-line 1.5s ease-in-out infinite;
    }
}

/* ── Responsive adjustments ── */
@media (max-width: 639px) {
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}