:root { --bg: #121212; --card: #1E1E1E; --text: #E0E0E0; --accent: #E82127; --dim: #888; --gold: #FFD700; }
body { margin: 0; font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); height: 100vh; overflow: hidden; }
.login-screen { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #000; z-index: 9999; display: flex; justify-content: center; align-items: center; }
.login-box { text-align: center; width: 300px; display: flex; flex-direction: column; gap: 15px; }
.login-box h1 { font-size: 40px; margin-bottom: 20px; }
.footer-credit { color: var(--dim); font-size: 12px; margin-top: 20px; font-family: monospace; }
.app-container { display: flex; height: 100%; width: 100%; }
.sidebar { width: 250px; background: #080808; padding: 30px; display: flex; flex-direction: column; border-right: 1px solid #222; }
.content { flex: 1; padding: 40px; overflow-y: auto; position: relative; }
h1, h2, h3, h4 { margin: 0 0 15px 0; font-weight: 600; }
.red-dot { color: var(--accent); }
.menu button { background: none; border: none; color: var(--dim); font-size: 16px; text-align: left; padding: 15px 0; cursor: pointer; width: 100%; transition: 0.2s; }
.menu button.active { color: #fff; border-right: 2px solid var(--accent); }
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.4s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
input { background: #222; border: 1px solid #333; padding: 12px; color: #fff; border-radius: 6px; outline: none; width: 100%; box-sizing: border-box; }
button#login-btn, .action-btn { background: var(--accent); color: #fff; border: none; padding: 12px; border-radius: 6px; cursor: pointer; font-weight: 600; width: 100%; }
.secondary { background: #333; }
.small-btn { background: #333; color: #fff; border: none; padding: 8px 15px; border-radius: 4px; cursor: pointer; font-size: 12px; }
.submit-btn { background: #2ea043; margin-top: 8px; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 30px; }
.card { background: var(--card); padding: 25px; border-radius: 10px; border: 1px solid #252525; }
.big-number { font-size: 48px; font-weight: 300; margin-top: 10px; }
.week-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 15px; }
.day-col { background: #181818; border-radius: 8px; padding: 10px; border: 1px solid #252525; }
.day-header { text-align: center; color: var(--accent); font-weight: bold; margin-bottom: 10px; padding-bottom: 5px; border-bottom: 1px solid #333; }
.lesson-item { background: #252525; padding: 10px; margin-bottom: 8px; border-radius: 4px; font-size: 13px; border-left: 3px solid #444; }
.lesson-item.next-lesson { border-left: 3px solid var(--gold); background: #332b00; box-shadow: 0 0 10px rgba(255, 215, 0, 0.2); }
.lesson-time { color: var(--dim); font-size: 11px; display: block; margin-bottom: 3px; }
.kanban { display: flex; gap: 20px; }
.col { flex: 1; }
.hw-card { background: var(--card); padding: 15px; margin-bottom: 10px; border-radius: 6px; border-left: 3px solid var(--dim); }
.hw-card.active { border-left-color: var(--accent); }
.settings-columns { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.set-col { background: #151515; padding: 15px; border-radius: 8px; }
.setting-row { margin-bottom: 15px; }
.setting-row label { display: block; margin-bottom: 5px; color: #aaa; font-size: 13px; }