/* style.css — Global Styles for IT-Tea.org */

:root {
    --primary: #2c3e50;    /* Глубокий синий (NIS Style) */
    --accent: #e67e22;     /* Оранжевый акцент */
    --success: #27ae60;    /* Зеленый для практики */
    --bg: #f4f7f6;         /* Светлый фон */
    --card-bg: #ffffff;
    --text: #333333;
    --border: #e0e0e0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; padding: 0; }

/* --- HEADER --- */
header {
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { font-size: 1.5rem; font-weight: bold; }
.logo i { margin-right: 10px; color: var(--accent); }

/* --- LAYOUT --- */
.container {
    max-width: 1000px;
    margin: 30px auto;
    padding: 0 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* --- CARDS --- */
.card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    border-top: 4px solid transparent;
}

.card:hover { transform: translateY(-5px); box-shadow: 0 5px 15px rgba(0,0,0,0.1); }

/* Цветовые коды предметов */
.card-cs { border-top-color: #3498db; }
.card-prog { border-top-color: #2ecc71; }

/* --- BUTTONS --- */
.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 500;
}
.btn:hover { background: #34495e; }

/* --- LESSON PAGE STYLES --- */
.lesson-nav { margin-bottom: 20px; }
.lesson-nav a { color: var(--primary); font-weight: bold; }

.lesson-header {
    background: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 5px solid var(--accent);
}

.stage-badge {
    background: #eee;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: bold;
    color: #777;
    margin-bottom: 10px;
    display: inline-block;
}

.theory-block {
    background: white;
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
}

.code-block {
    background: #2d3436;
    color: #dfe6e9;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Consolas', monospace;
    overflow-x: auto;
}

.interactive-box {
    background: #e8f5e9;
    border: 2px dashed var(--success);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}