/* =========================
   SILANA TECH - MINIMAL STARTUP STYLE
   ========================= */

:root {
    --primary-blue: #1f3c88;
    --accent-green: #00c896;
    --dark: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --border: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

/* =========================
   NAVBAR (FIXED STRUCTURE)
   ========================= */

#top-menu {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    padding: 28px 8%;
    border-bottom: 1px solid var(--border);
    z-index: 1000;

    display: flex;
    align-items: center;
    justify-content: space-between;

    transition: all 0.3s ease;
}

/* When scrolling */
#top-menu.scrolled {
    padding: 12px 8%;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
}

/* LEFT: LOGO */
.logo-wrapper {
    display: flex;
    align-items: center;
}

#logo-fixed {
    height: 70px;
    transition: all 0.3s ease;
}

#top-menu.scrolled #logo-fixed {
    height: 42px;
}

/* CENTER: MENU */
#top-menu ul {
    list-style: none;
    display: flex;
    gap: 35px;
    margin: 0;
    padding: 0;
}

#top-menu ul li {
    display: flex;
    align-items: center;
}

#top-menu ul li a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

#top-menu ul li a:hover {
    color: var(--primary-blue);
}

/* RIGHT: LANGUAGE SWITCHER */
.language-switcher {
    display: flex;
    gap: 10px;
    align-items: center;
}

.language-switcher button {
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gray);
    transition: color 0.3s ease;
}

.language-switcher button:hover {
    color: var(--primary-blue);
}

/* =========================
   HERO
   ========================= */

header {
    padding: 160px 8% 120px 8%;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
}

#logo {
    height: 80px;
    margin-bottom: 30px;
}

h1 {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

#slogan {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 40px;
}

.highlight-blue {
    color: var(--primary-blue);
}

.highlight-green {
    color: var(--accent-green);
}

/* =========================
   BUTTON
   ========================= */

.btn {
    display: inline-block;
    background-color: var(--primary-blue);
    color: white;
    padding: 14px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: var(--accent-green);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* =========================
   SECTIONS
   ========================= */

section {
    padding: 100px 8%;
    text-align: center;
}

section:nth-child(even) {
    background-color: white;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    font-weight: 700;
}

/* =========================
   SERVICES
   ========================= */

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-item {
    padding: 35px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: white;
    transition: 0.3s ease;
}

.service-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
}

.service-item h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

/* =========================
   APPROACH
   ========================= */

.approach-steps {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 40px;
}

.step {
    padding: 14px 22px;
    border-radius: 30px;
    background: var(--primary-blue);
    color: white;
    font-size: 0.9rem;
}

/* =========================
   TECHNOLOGIES
   ========================= */

.tech-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
}

.tech-list span {
    padding: 10px 18px;
    border-radius: 25px;
    background-color: var(--accent-green);
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
}

/* =========================
   ABOUT
   ========================= */

#about p {
    max-width: 700px;
    margin: 0 auto 20px auto;
    color: var(--gray);
}

/* =========================
   CONTACT
   ========================= */

#contact p {
    margin-bottom: 25px;
    color: var(--gray);
}

/* =========================
   FOOTER
   ========================= */

footer {
    padding: 40px 8%;
    text-align: center;
    border-top: 1px solid var(--border);
    background: white;
    font-size: 0.9rem;
    color: var(--gray);
}

/* =========================
   RESPONSIVE
   ========================= */

@media (max-width: 768px) {

    #top-menu ul {
        display: none;
    }

    header {
        padding: 140px 6% 100px 6%;
    }

    h1 {
        font-size: 2rem;
    }

    section {
        padding: 80px 6%;
    }

}