/* ==========================
   PAGRINDINIAI KINTAMIEJI
========================== */
:root {
    --primary-color: #1d4ed8;   /* tamsiai mėlyna */
    --secondary-color: #f59e0b; /* geltona akcentui */
    --text-color: #111827;      /* tamsiai pilka tekstui */
    --muted-color: #6b7280;     /* švelni pilka */
    --bg-color: #f9fafb;        /* šviesus fonas */
    --white: #ffffff;           /* balta */
}

/* ==========================
   VISADA SCROLL
========================== */
html {
    overflow-y: scroll; /* visada rodyti vertikalų slinktį, net jei puslapis trumpas */
    scroll-behavior: smooth; /* užtikrina sklandų slinkimą, jei būtų reikia */
}

/* ==========================
   BENDRAS
========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* ==========================
   ANTRAŠTĖ / NAV
========================== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 60px;
    background-color: var(--white);
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    color: var(--primary-color);
    font-size: 24px;
    letter-spacing: 2px;
}

nav a {
    margin-left: 25px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-color);
}

/* ==========================
   HERO / PAGRINDINIS BLOKAS
========================== */
.hero {
    text-align: center;
    padding: 100px 40px;
    background: linear-gradient(to right, #e0f2fe, #ffffff);
}

.hero h2 {
    font-size: 42px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero p {
    font-size: 18px;
    color: var(--muted-color);
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero .btn {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 14px 36px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s;
}

.hero .btn:hover {
    background-color: var(--secondary-color);
}

/* ==========================
   SKIRSNIAI / SEKCJOS
========================== */
section {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.section-sub {
    text-align: center;
    margin-bottom: 50px;
    color: var(--muted-color);
}

/* ==========================
   KORTELĖS / TINKLARAŠTIS
========================== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.card {
    background-color: var(--white);
    border: 1px solid #e5e7eb;
    padding: 30px;
    border-radius: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card h3 {
    margin-bottom: 12px;
    color: var(--primary-color);
}

/* ==========================
   KONTAKTAI / FORMA
========================== */
.contact-box {
    background-color: var(--white);
    padding: 50px;
    border-radius: 10px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.contact-box form {
    display: grid;
    gap: 15px;
}

.contact-box input,
.contact-box textarea {
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 16px;
}

.contact-box button {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 14px;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-box button:hover {
    background-color: var(--secondary-color);
}

/* ==========================
   APAČIA / FOOTER
========================== */
footer {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--white);
    color: var(--muted-color);
    margin-top: 60px;
    border-top: 1px solid #e5e7eb;
}

/* ==========================
   RESPONSYVUS DIZAINAS
========================== */
@media(max-width:768px) {
    header {
        flex-direction: column;
        padding: 20px;
    }
    nav {
        margin-top: 10px;
    }
}