:root {
    --lume-bg: #151a26;
    --lume-bg-deep: #0d111b;
    --lume-panel: #1b2130;
    --lume-teal: #52BABC;
    --lume-yellow: #F0EE1A;
    --lume-text: #e8eaf0;
    --lume-text-muted: #c6cbd8;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    color: var(--lume-text);
    background-color: var(--lume-bg);
    font-family: 'Outfit', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-style: normal;
    font-weight: 400;
    font-size: 16px;
}

a {
    color: var(--lume-text);
}

a:hover {
    color: var(--lume-teal);
}

/* ---------- Navbar ---------- */

.lume-navbar {
    text-align: right;
    background-color: rgba(13, 17, 27, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

nav a {
    font-weight: 500;
    letter-spacing: 0.04em;
}

.navbar li.nav-item.active > a {
    text-decoration: underline;
    text-underline-offset: 5px;
    text-decoration-color: var(--lume-teal);
    text-decoration-thickness: 2px;
}

div.container-fluid {
    background-color: var(--lume-bg);
}

/* ---------- Sections ---------- */

.lume-section {
    padding: 90px 0;
}

.lume-header {
    font-weight: 800;
    font-size: 38px;
    letter-spacing: 0.06em;
    color: var(--lume-text);
    text-align: center;
}

.lume-yellow {
    color: var(--lume-yellow);
}

.lume-magenta {
    color: var(--lume-teal);
}

/* ---------- Hero ---------- */

#aboutus {
    background-image: linear-gradient(rgba(13, 17, 27, 0.72), rgba(13, 17, 27, 0.72)), url("aboutus.webp");
    background-size: cover;
    background-position: center;
}

.motto {
    font-weight: 800;
    font-size: clamp(36px, 6vw, 64px);
    line-height: 1.15;
    color: #ffffff;
    text-align: left;
    border-left: 5px solid var(--lume-teal);
    width: 90%;
    padding-left: 2rem;
}

.hero-sub {
    font-size: 20px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--lume-text-muted);
    max-width: 560px;
    margin-top: 24px;
    margin-bottom: 0;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 32px;
}

.btn-lume {
    display: inline-block;
    background-color: var(--lume-teal);
    color: var(--lume-bg-deep);
    font-size: 16px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 8px;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn-lume:hover {
    background-color: #6ccdcf;
    color: var(--lume-bg-deep);
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-lume-outline {
    display: inline-block;
    border: 2px solid var(--lume-teal);
    color: var(--lume-teal);
    font-size: 16px;
    font-weight: 600;
    padding: 10px 26px;
    border-radius: 8px;
    transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.btn-lume-outline:hover {
    background-color: var(--lume-teal);
    color: var(--lume-bg-deep);
    text-decoration: none;
    transform: translateY(-2px);
}

/* ---------- Technology cards ---------- */

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    padding: 0 16px;
}

.tech-card {
    background-color: #ffffff;
    color: #333;
    font-weight: 600;
    width: 180px;
    padding: 28px 24px;
    border-radius: 14px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 14px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tech-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.tech-card img {
    max-height: 72px;
    max-width: 100%;
    object-fit: contain;
    align-self: center;
}

/* ---------- Project card ---------- */

.project-card {
    background-color: #ffffff;
    color: #555;
    max-width: 520px;
    margin: 0 16px;
    padding: 36px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.project-card img {
    max-width: 160px;
    margin-bottom: 20px;
}

.project-card h3 {
    color: #222;
    font-weight: 700;
    font-size: 26px;
    margin-bottom: 12px;
}

.project-card a {
    color: var(--lume-teal);
}

/* ---------- Contact ---------- */

#contact {
    background-image: linear-gradient(rgba(13, 17, 27, 0.6), rgba(13, 17, 27, 0.6)), url("contactusbg.png");
    background-size: cover;
    background-position: center;
    padding: 110px 0;
}

/* ---------- Scroll reveal ---------- */

.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .fade-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
}