@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');

:root {
    --green: #00ff66;
    --dim-green: #397c4c;
    --text-green: #82b88e;
    --bg: #0a0a0a;
    --box-bg: #0d120e;
    --box-header: #102016;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Ubuntu', sans-serif;
    background-color: var(--bg);
    color: var(--green);
    margin: 0;
}

/* Navigation */

.tui-navbar {
    width: 25%;
    height: 100vh;
    background: var(--bg);
    border: 2px solid #176b35;
    color: var(--green);
    display: flex;
    flex-direction: column;
    padding: 12px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.tui-navbar.closed {
    transform: translateX(-100%);
}

.nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--dim-green);
}

.nav-title {
    font-weight: bold;
    letter-spacing: 1px;
}

.nav-toggle {
    color: var(--green);
    background: transparent;
    border: none;
    font: inherit;
    font-size: 24px;
    cursor: pointer;
}

.nav-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 24px;
}

.nav-link {
    display: block;
    padding: 12px 8px;
    color: var(--text-green);
    text-decoration: none;
    transition: 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--green);
    background: #102817;
}

.nav-link:hover {
    padding-left: 16px;
}

.nav-footer {
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--dim-green);
    color: var(--dim-green);
    font-size: 12px;
    line-height: 2;
}

/* Navigation toggle */

.open-toggle {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 999;
    display: none;
    color: var(--green);
    background: var(--bg);
    border: 1px solid var(--dim-green);
    font-family: "Courier New", monospace;
    font-size: 24px;
    cursor: pointer;
    padding: 4px 10px;
}

.open-toggle.visible {
    display: block;
}

/* Main content */

.main-content {
    margin-left: 25%;
    padding: 45px;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Shared boxes */

.tui-box {
    background: var(--box-bg);
    border: 1px solid #176b35;
    font-family: "Courier New", monospace;
    min-width: 0;
}

.box-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--dim-green);
    background: var(--box-header);
    color: var(--green);
    font-size: 14px;
}

.box-symbol {
    color: var(--dim-green);
    font-size: 12px;
}

.box-content {
    padding: 20px;
}

.box-content h2 {
    color: var(--green);
    font-size: 19px;
    margin: 0 0 14px;
}

.box-content p {
    color: var(--text-green);
    font-family: 'Ubuntu', sans-serif;
    font-size: 15px;
    line-height: 1.8;
    margin: 0;
}

.box-content ul {
    color: var(--text-green);
}

/* Footer */

.page-footer {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 35px;
    padding-top: 15px;
    border-top: 1px solid var(--dim-green);
    font-family: "Courier New", monospace;
    font-size: 11px;
    color: var(--dim-green);
}

/* Responsive */

@media (max-width: 900px) {
    .tui-navbar {
        width: 280px;
        max-width: 85vw;
    }

    .main-content {
        margin-left: 0;
        padding: 70px 24px 30px;
    }
}

@media (max-width: 600px) {
    .main-content {
        padding-left: 16px;
        padding-right: 16px;
    }

    .page-footer {
        flex-direction: column;
    }
}