/* =========================
   GLOBAL RESET & BASE
========================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: #ffffff;
    color: #111111;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* =========================
   HEADER
========================= */
header {
    background: #0a0a0a;
    color: #ffffff;
    padding: 28px 16px;
    text-align: center;
}

header h1 {
    font-size: 30px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

header p {
    margin-top: 8px;
    font-size: 15px;
    color: #ffffff;
    opacity: 0.9;
}

/* =========================
   MAIN LAYOUT
========================= */
main {
    max-width: 1080px;
    margin: 0 auto;
    padding: 28px 18px 50px;
}

/* =========================
   TYPOGRAPHY
========================= */
h2 {
    margin-top: 42px;
    margin-bottom: 10px;
    font-size: 26px;
    font-weight: 700;
    color: #141414;
}

h3 {
    margin-top: 28px;
    margin-bottom: 6px;
    font-size: 20px;
    font-weight: 600;
    color: #181818;
}

p {
    font-size: 15.5px;
    margin: 10px 0 12px;
    color: #1a1a1a;
}

ul {
    padding-left: 22px;
    font-size: 15.5px;
    margin: 8px 0 14px;
}

ul li {
    margin-bottom: 6px;
}

/* =========================
   HIGHLIGHT / INFO BOXES
========================= */
.highlight,
.info-box {
    background: #f7f7f7;
    border-left: 4px solid #000000;
    padding: 14px 16px;
    margin: 22px 0;
    font-size: 14.5px;
    color: #222222;
}

/* =========================
   DOWNLOAD SECTION
========================= */
.download-box {
    background: linear-gradient(180deg, #f9f9f9, #f2f2f2);
    border: 1px solid #dddddd;
    padding: 30px 22px;
    text-align: center;
    margin: 44px 0;
}

.download-box p {
    margin-bottom: 20px;
    font-size: 15px;
    color: #333333;
}

.download-btn {
    display: inline-block;
    padding: 16px 42px;
    font-size: 16px;
    font-weight: 700;
    background: #000000;
    color: #ffffff;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.4px;
}

.download-btn:hover:not(:disabled) {
    background: #d60000;
    transform: translateY(-1px);
}

.download-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.download-btn:disabled {
    background: #555555;
    cursor: not-allowed;
}

/* =========================
   NOTE TEXT
========================= */
.note {
    font-size: 13.5px;
    color: #444;
    margin-top: 10px;
}

/* =========================
   LINK STYLING
========================= */
a {
    color: #000000;
    text-decoration: underline;
}

a:hover {
    color: #d60000;
}

/* =========================
   FOOTER
========================= */
footer {
    background: #0a0a0a;
    color: #ffffff;
    text-align: center;
    padding: 18px 10px;
    font-size: 13px;
}

footer p {
    margin: 4px 0;
    opacity: 0.9;
}

/* =========================
   MOBILE RESPONSIVE
========================= */
@media (max-width: 768px) {
    header h1 {
        font-size: 24px;
    }

    header p {
        font-size: 14px;
    }

    main {
        padding: 20px 14px 40px;
    }

    h2 {
        font-size: 22px;
    }

    h3 {
        font-size: 18px;
    }

    .download-box {
        padding: 22px 14px;
    }

    .download-btn {
        width: 100%;
        padding: 15px 10px;
    }
}

/* =========================
   EXTRA SMALL DEVICES
========================= */
@media (max-width: 420px) {
    header h1 {
        font-size: 22px;
    }

    h2 {
        font-size: 20px;
    }
}

/* =========================
   SCROLLBAR (THIN & CLEAN)
========================= */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-thumb {
    background: #b5b5b5;
    border-radius: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}