:root {
    --se-white: #ffffff;
    --se-dark: #1f2937;
    --se-orange: #f86e17;
    --se-lorange: #fcb78b;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Source Sans', system-ui, sans-serif;
    color: var(--se-dark);
    background-color: #f9fafb;
}

.font-kelson {
    font-family: 'Kelson Sans', system-ui, sans-serif;
}

.nav-active {
    color: var(--se-orange) !important;
    border-bottom: 2px solid var(--se-orange);
}

.page {
    display: none;
    scroll-margin-top: 4em;
    scroll-snap-margin-top: 4em;
}

.page.active {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

.tech-tab-content {
    display: none;
}

.tech-tab-content.active {
    display: block;
    animation: fadeIn 0.25s ease-in-out;
}

.tech-tab-btn.active {
    border-color: var(--se-orange);
    color: var(--se-orange);
    background-color: rgb(255 247 237 / var(--tw-bg-opacity, 1))
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.hero-gradient {
    background:
        radial-gradient(circle at top right, rgba(248, 110, 23, 0.16), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #fff7ed 100%);
}

.check-list li,
.warn-list li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.check-list li::before {
    content: "✓";
    flex: 0 0 auto;
    width: 1.35rem;
    height: 1.35rem;
    border-radius: 999px;
    background: #dcfce7;
    color: #15803d;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 900;
    margin-top: 0.15rem;
}

.warn-list li::before {
    content: "!";
    flex: 0 0 auto;
    width: 1.35rem;
    height: 1.35rem;
    border-radius: 999px;
    background: #fef3c7;
    color: #b45309;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 900;
    margin-top: 0.15rem;
}

.prot-step {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 2.5rem;
}

.prot-step::before {
    content: "";
    position: absolute;
    left: 0.95rem;
    top: 2.2rem;
    width: 2px;
    height: calc(100% - 1.5rem);
    background: #d1d5db;
}

.prot-step:last-child::before {
    display: none;
}

.prot-dot {
    position: absolute;
    left: 0;
    top: 0.25rem;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.75rem;
    color: #fff;
    background: var(--se-orange);
}

.schematic-box {
    position: relative;
    border: 2px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    text-align: center;
    font-family: 'Kelson Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: #fff;
}

.schematic-box.active-box {
    border-color: var(--se-orange);
    background: #fff7ed;
}

.schematic-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    font-size: 1.5rem;
    padding: 0.25rem 0;
}

.mobile-menu {
    display: none;
}

.mobile-menu.open {
    display: block;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.accordion-content.open {
    max-height: 600px;
}

.sim-input {
    width: 100%;
    border: 1px solid #d1d5db;
    border-radius: 0.75rem;
    padding: 0.45rem;
    text-align: right;
}