:root {
    --paper: #ECEAE0;
    --paper-2: #E4E1D4;
    --paper-3: #D9D5C4;
    --ink: #1B1B17;
    --ink-2: #3A3A33;
    --ink-3: #6B6B60;
    --ink-4: #9A9A8C;
    --line: #1B1B17;
    --line-soft: #B6B2A0;
    --green: #3F8E3A;
    --green-d: #2E6B2B;
    --green-l: #56A24E;
    --red: #B2412E;
    --blue: #3F6B8E;
    --violet: #6B5E8E;
    --peach: #C28B6E;
    --tile-mint: #CFE3C2;
    --tile-blue: #C8D5E5;
    --tile-violet: #D4CCE2;
    --tile-peach: #E8CDBC;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100vh; }
body {
    font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
    background: var(--paper);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    display: flex;
    justify-content: center;
}

/* Faint dot grid background */
body::before {
    content: "";
    position: fixed; inset: 0;
    background-image: radial-gradient(rgba(27,27,23,.07) 1px, transparent 1px);
    background-size: 18px 18px;
    pointer-events: none;
    z-index: 0;
}

.site-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    margin: 40px 20px;
    background: var(--paper);
    border: 1.5px solid var(--ink);
    box-shadow: 8px 8px 0 0 rgba(27,27,23,.12), 0 0 0 1px rgba(27,27,23,.04) inset;
    display: flex;
    flex-direction: column;
}

.site-container::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: repeating-linear-gradient(0deg, rgba(27,27,23,.012) 0 1px, transparent 1px 3px);
    mix-blend-mode: multiply;
}

/* HEADER */
.header {
    height: 50px;
    border-bottom: 1.5px solid var(--ink);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: var(--paper-2);
}

.logo-box {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--ink);
    background: linear-gradient(135deg, transparent 49.5%, var(--ink) 49.5% 50.5%, transparent 50.5%);
    background-color: var(--tile-mint);
}

.brand-name {
    font-family: "VT323", monospace;
    font-size: 24px;
    letter-spacing: .04em;
    color: var(--ink);
    line-height: 1;
}

.nav {
    display: flex;
    gap: 20px;
}

.nav-link {
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--ink-2);
    text-decoration: none;
    transition: color .15s;
}

.nav-link:hover, .nav-link.active {
    color: var(--ink);
}

/* MAIN CONTENT */
.main-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.hero {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.hero-content {
    border: 1.5px dashed var(--ink);
    background: repeating-linear-gradient(135deg, transparent 0 14px, rgba(27,27,23,.07) 14px 15px);
    padding: 40px 30px;
    text-align: center;
    position: relative;
}

.hero-content::before, .hero-content::after {
    content: ""; position: absolute; width: 10px; height: 10px; border: 1.5px solid var(--ink); background: var(--paper);
}
.hero-content::before { top: -1.5px; left: -1.5px; }
.hero-content::after { bottom: -1.5px; right: -1.5px; }

.hero-title {
    font-family: "VT323", monospace;
    font-size: 48px;
    line-height: 1.1;
    letter-spacing: .04em;
    margin: 0 0 15px;
    color: var(--ink);
}

.hero-desc {
    font-size: 14px;
    color: var(--ink-2);
    margin: 0;
    max-width: 500px;
    margin: 0 auto;
}

/* DOWNLOAD SECTION */
.download-section {
    border: 1.5px solid var(--ink);
    background: var(--paper-2);
    padding: 24px;
    position: relative;
}

.h-title {
    font-family: "VT323", monospace;
    font-size: 32px;
    line-height: 1;
    letter-spacing: .06em;
    margin: 0 0 5px;
    color: var(--ink);
}

.h-sub {
    font-size: 12px;
    color: var(--ink-3);
    margin: 0 0 20px;
    letter-spacing: .04em;
}

.os-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.os-card {
    border: 1.5px solid var(--ink);
    background: var(--paper);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--ink);
    transition: transform .1s, box-shadow .1s, background .15s;
    cursor: pointer;
}

.os-card:hover {
    background: var(--paper-3);
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 0 var(--ink);
}

.os-card:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 0 var(--ink);
}

.os-icon {
    width: 54px;
    height: 54px;
    border: 1.5px solid var(--ink);
    position: relative;
}

.win-icon { background-color: var(--tile-blue); }
.mac-icon { background-color: var(--tile-peach); }
.lin-icon { background-color: var(--tile-mint); }

/* Decorative patterns for OS icons */
.win-icon::after {
    content: ""; position: absolute; inset: 10px; border: 1.5px solid var(--ink);
    background: linear-gradient(90deg, transparent 48%, var(--ink) 48%, var(--ink) 52%, transparent 52%),
                linear-gradient(180deg, transparent 48%, var(--ink) 48%, var(--ink) 52%, transparent 52%);
}

.mac-icon::after {
    content: ""; position: absolute; inset: 12px; border: 1.5px solid var(--ink); border-radius: 50%;
}

.lin-icon::after {
    content: ""; position: absolute; left: 16px; top: 12px; right: 16px; bottom: 12px; 
    border: 1.5px solid var(--ink); border-radius: 20px 20px 0 0;
}

.os-info {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.os-name {
    font-family: "VT323", monospace;
    font-size: 24px;
    letter-spacing: .04em;
    line-height: 1;
}

.os-req {
    font-size: 10px;
    color: var(--ink-3);
    letter-spacing: .04em;
}

.os-btn {
    background: var(--green);
    color: #F4FFF1;
    border: 1.5px solid var(--ink);
    font-family: "JetBrains Mono", monospace;
    font-size: 12px;
    font-weight: 700;
    padding: 6px 16px;
    text-transform: uppercase;
    letter-spacing: .1em;
    width: 100%;
    text-align: center;
    margin-top: auto;
}

.os-card:hover .os-btn {
    background: var(--green-l);
}

/* FEATURES */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.feature-card {
    border: 1.5px solid var(--ink);
    background: var(--paper);
    padding: 16px;
}

.f-title {
    font-family: "VT323", monospace;
    font-size: 22px;
    letter-spacing: .04em;
    margin: 0 0 8px;
    color: var(--ink);
}

.f-desc {
    font-size: 11.5px;
    color: var(--ink-2);
    margin: 0;
    line-height: 1.4;
}

/* FOOTER */
.footer {
    border-top: 1.5px solid var(--ink);
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--paper);
}

.copyright {
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: .04em;
    margin: 0;
}

.version {
    font-size: 11px;
    color: var(--ink-3);
    font-weight: 700;
    letter-spacing: .08em;
    margin: 0;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .os-cards { grid-template-columns: 1fr; }
    .features { grid-template-columns: 1fr; }
    .site-container { margin: 20px 10px; }
    .hero-title { font-size: 36px; }
}

/* FORMS */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.auth-card {
    border: 1.5px solid var(--ink);
    background: var(--paper-2);
    padding: 30px;
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    box-shadow: 6px 6px 0 0 rgba(27,27,23,.12);
}

.auth-title {
    font-family: "VT323", monospace;
    font-size: 36px;
    letter-spacing: .04em;
    color: var(--ink);
    margin: 0;
    text-align: center;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--ink-3);
    text-transform: uppercase;
    font-weight: 600;
}

.form-input {
    border: 1.5px solid var(--ink);
    background: var(--paper);
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--ink);
    transition: background .15s;
}

.form-input:focus {
    outline: none;
    background: #fff;
    border-color: var(--green);
}

.auth-footer {
    text-align: center;
    font-size: 12px;
    color: var(--ink-2);
    margin-top: 10px;
}

.auth-link {
    color: var(--ink);
    text-decoration: underline;
    font-weight: 600;
}

.auth-link:hover {
    color: var(--green);
}

.btn-large {
    font-size: 24px;
    padding: 12px;
    width: 100%;
    margin-top: 10px;
}