/* ============================================
   linos.ir – Main Stylesheet
   Linux Terminal Theme, Vazir font local
   ============================================ */
@font-face {
    font-family: 'Vazir';
    src: url('../fonts/Vazir.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2333;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #00ff88;
    --accent-hover: #00cc66;
    --accent-glow: rgba(0,255,136,0.2);
    --danger: #ff5252;
    --warning: #ffb74d;
    --border: #30363d;
    --border-light: #21262d;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow: 0 8px 24px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px rgba(0,255,136,0.15);
    --transition: 0.25s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Vazir', Tahoma, Geneva, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    direction: rtl;
}
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 1.5rem; }

/* --- Typography --- */
.text-gradient {
    background: linear-gradient(135deg, var(--accent), #00aaff);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.65rem 1.6rem; border-radius: var(--radius-md); font-weight: 700;
    font-size: 0.95rem; cursor: pointer; transition: all var(--transition);
    border: 2px solid transparent; white-space: nowrap;
}
.btn--primary {
    background: var(--accent); color: #0d1117;
    box-shadow: 0 0 20px rgba(0,255,136,0.3);
}
.btn--primary:hover {
    background: var(--accent-hover); transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0,255,136,0.6);
}
.btn--outline {
    border-color: var(--accent); color: var(--accent); background: transparent;
}
.btn--outline:hover {
    background: var(--accent); color: #0d1117;
}
.btn--white { background: white; color: #0d1117; }
.btn--lg { padding: 0.8rem 2rem; font-size: 1.05rem; border-radius: var(--radius-lg); }

/* --- Header --- */
.header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(13,17,23,0.92); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
}
.header__inner {
    display: flex; align-items: center; justify-content: space-between; padding: 0.7rem 0;
}
.logo {
    display: flex; align-items: center; gap: 0.5rem; font-weight: 700;
    font-size: 1.5rem; color: var(--accent);
}
.logo__dot { color: white; }

.hamburger {
    display: none; flex-direction: column; gap: 5px; background: none;
    border: none; cursor: pointer; padding: 8px;
}
.hamburger span {
    width: 24px; height: 2.5px; background: var(--accent); border-radius: 3px;
    transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.nav { display: flex; align-items: center; gap: 2rem; }
.nav__list { display: flex; gap: 1.8rem; }
.nav__link {
    color: var(--text-secondary); font-weight: 600; font-size: 0.95rem;
    transition: color var(--transition); position: relative;
}
.nav__link::after {
    content: ''; position: absolute; bottom: -4px; right: 0; width: 0; height: 2px;
    background: var(--accent); transition: width var(--transition); border-radius: 2px;
}
.nav__link:hover, .nav__link.active { color: var(--accent); }
.nav__link:hover::after, .nav__link.active::after { width: 100%; }

@media (max-width: 991px) {
    .hamburger { display: flex; }
    .nav {
        position: fixed; top: 0; right: 0; width: 280px; height: 100vh;
        background: var(--bg-secondary); flex-direction: column; align-items: flex-start;
        padding: 6rem 2rem 2rem; gap: 1.5rem; transform: translateX(100%);
        transition: transform var(--transition); box-shadow: var(--shadow); z-index: 999;
    }
    .nav.active { transform: translateX(0); }
    .nav__list { flex-direction: column; width: 100%; gap: 1rem; }
}

/* --- Hero (Home) --- */
.hero--home {
    padding: 3rem 0; background: radial-gradient(circle at top right, #1a2a1f, var(--bg-primary));
}
.hero__grid {
    display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center;
}
@media (min-width: 992px) { .hero__grid { grid-template-columns: 1fr 1fr; } }

.terminal-window {
    width: 100%; max-width: 500px; background: #0a0f14; border-radius: var(--radius-md);
    border: 1px solid var(--border); overflow: hidden; box-shadow: 0 0 40px rgba(0,255,136,0.2);
}
.terminal-header {
    background: #1c2826; padding: 0.6rem 1rem; display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid #2a3a33;
}
.terminal-btn { width: 12px; height: 12px; border-radius: 50%; }
.terminal-btn.close { background: #ff5f56; }
.terminal-btn.minimize { background: #ffbd2e; }
.terminal-btn.maximize { background: #27c93f; }
.terminal-title { margin-right: auto; color: #6b8f71; font-size: 0.8rem; }
.terminal-body {
    padding: 1.5rem; font-family: 'Courier New', monospace; color: var(--accent);
    min-height: 200px;
}
.prompt { color: #00aa55; }
.cmd { color: white; }
.output { color: #b8d4b8; margin-bottom: 0.5rem; }
.cursor { animation: blink 1s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero__badge {
    display: inline-block; background: rgba(0,255,136,0.15); color: var(--accent);
    padding: 0.3rem 1rem; border-radius: 50px; font-weight: 600; font-size: 0.85rem;
    margin-bottom: 1rem;
}
.hero__title { font-size: 2.4rem; font-weight: 900; color: white; line-height: 1.3; }
.hero__desc { font-size: 1.05rem; color: var(--text-secondary); margin: 1rem 0 1.5rem; max-width: 500px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }

/* --- Features Section --- */
.features { padding: 4rem 0; background: var(--bg-secondary); }
.section__header { text-align: center; margin-bottom: 2rem; }
.section__tag {
    display: inline-block; background: rgba(0,255,136,0.1); color: var(--accent);
    padding: 0.25rem 1rem; border-radius: 50px; font-size: 0.8rem; margin-bottom: 0.5rem;
}
.section__title { font-size: 2rem; font-weight: 900; color: white; }
.features-grid {
    display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 600px) { .features-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 992px) { .features-grid { grid-template-columns: repeat(4,1fr); } }
.feature-card {
    background: var(--bg-tertiary); padding: 1.8rem; border-radius: var(--radius-md);
    border: 1px solid var(--border); transition: all var(--transition); text-align: center;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-glow); }
.feature-icon { font-size: 2.5rem; margin-bottom: 0.8rem; display: block; }
.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* --- Lessons Grid (Home & Lessons Page) --- */
.latest-lessons { padding: 4rem 0; }
.lessons-grid {
    display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 600px) { .lessons-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 992px) { .lessons-grid { grid-template-columns: repeat(3,1fr); } }
.lesson-card {
    background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: var(--radius-md);
    padding: 1.5rem; display: flex; align-items: center; gap: 1rem;
    transition: all var(--transition); color: white;
}
.lesson-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.lesson-card__icon { font-size: 2rem; }
.lesson-card__content h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.lesson-card__content p { font-size: 0.85rem; color: var(--text-secondary); }
.lesson-card__arrow { margin-right: auto; color: var(--accent); font-size: 1.2rem; }

.section__footer-link { text-align: center; margin-top: 2rem; }

/* --- CTA --- */
.cta-section { padding: 3rem 0; }
.cta-box {
    background: linear-gradient(135deg, #0d3320, #0a2a1a);
    border: 1px solid var(--accent); border-radius: var(--radius-xl);
    padding: 3rem 2rem; text-align: center;
    box-shadow: 0 0 30px rgba(0,255,136,0.2);
}
.cta-box__title { font-size: 1.8rem; color: white; margin-bottom: 0.5rem; }
.cta-box__desc { color: var(--text-secondary); margin-bottom: 1.5rem; }

/* --- Page Hero (inner pages) --- */
.page-hero {
    background: radial-gradient(circle at top left, #1a2a1f, var(--bg-primary));
    padding: 2.5rem 0; text-align: center;
}
.page-hero__title { font-size: 2rem; font-weight: 900; color: white; }
.page-hero__subtitle { color: var(--text-secondary); margin-top: 0.5rem; }

/* --- Content Sections (inner pages) --- */
.content-section { padding: 3rem 0; }
.content-text { max-width: 900px; margin: 0 auto; }
.content-text h2 { color: var(--accent); margin: 2rem 0 0.8rem; font-size: 1.5rem; }
.content-text p { margin-bottom: 1rem; color: #c9d1d9; }
.content-text ul { list-style-type: square; margin-right: 1.5rem; color: #c9d1d9; margin-bottom: 1rem; }
.content-text li { margin-bottom: 0.5rem; }

/* --- Distros Page --- */
.distro-card {
    background: var(--bg-tertiary); padding: 1.8rem; border-radius: var(--radius-md);
    border: 1px solid var(--border); margin-bottom: 1.5rem;
}
.distro-card--debian { border-color: var(--accent); background: rgba(0,255,136,0.05); }
.distro-badge {
    background: var(--accent); color: #0d1117; padding: 0.2rem 0.8rem;
    border-radius: 50px; font-size: 0.8rem; font-weight: bold; display: inline-block; margin-right: 0.5rem;
}
.distro-card h2 { color: white; margin-bottom: 0.3rem; }
.distro-card p { color: var(--text-secondary); }

/* --- Contact Page --- */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-info-card {
    background: var(--bg-tertiary); padding: 1.8rem; border-radius: var(--radius-md);
    border: 1px solid var(--border);
}
.contact-info-card h3 { color: var(--accent); margin-bottom: 0.8rem; }
.contact-info-list li { margin-bottom: 0.8rem; color: var(--text-secondary); }

/* --- Article/Lesson Page --- */
.article-page {
    max-width: 800px; margin: 2rem auto; background: var(--bg-secondary);
    padding: 2.5rem; border-radius: var(--radius-lg); border: 1px solid var(--border);
}
.article-header .article-tag {
    background: rgba(0,255,136,0.15); color: var(--accent); padding: 0.2rem 0.8rem;
    border-radius: 50px; font-size: 0.8rem; margin-bottom: 0.5rem; display: inline-block;
}
.article-header h1 { font-size: 2rem; margin: 0.5rem 0; }
.article-meta { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }
.article-content p { margin-bottom: 1.2rem; color: #c9d1d9; line-height: 2; }
.article-content h2 { color: var(--accent); margin: 2rem 0 0.5rem; font-size: 1.4rem; }
.article-content ul { list-style-type: square; margin-right: 1.5rem; color: #c9d1d9; margin-bottom: 1rem; }
.article-content li { margin-bottom: 0.5rem; }
.lesson-nav { display: flex; justify-content: space-between; margin-top: 2rem; }

pre, code {
    direction: ltr;
    text-align: left;
    unicode-bidi: embed;
}

/* --- Footer --- */
.footer {
    background: #0a0f14; color: #8b949e; padding: 3rem 0 0; margin-top: 4rem;
    border-top: 1px solid var(--border);
}
.footer__inner { display: grid; grid-template-columns: 1fr; gap: 2rem; padding-bottom: 2rem; }
@media (min-width: 600px) { .footer__inner { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 992px) { .footer__inner { grid-template-columns: 1.5fr 1fr 1fr 1fr; } }
.footer__title { color: white; font-weight: 700; margin-bottom: 0.8rem; }
.footer__links li { margin-bottom: 0.3rem; }
.footer__links a { color: var(--text-secondary); font-size: 0.9rem; transition: color var(--transition); }
.footer__links a:hover { color: var(--accent); }
.footer__contact li { margin-bottom: 0.5rem; }
.footer__bottom {
    border-top: 1px solid var(--border-light); padding: 1rem 0; text-align: center;
    font-size: 0.85rem;
}

/* Scroll Top */
.scroll-top {
    position: fixed; bottom: 25px; left: 25px; width: 44px; height: 44px;
    border-radius: 50%; background: var(--accent); color: #0d1117; border: none;
    font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden;
    transform: translateY(15px); transition: all var(--transition); z-index: 999;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 0 15px rgba(0,255,136,0.5);
}
.scroll-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }