:root {
    --bg-deep: #02050a;
    --bg-navy: #0a1122;
    --accent: #00d4ff;
    --border-color: #1e3a5f;
    --text-primary: #e0e6ed;
    --text-secondary: #607d8b;
}

* { margin: 0; padding: 0; box-sizing: border-box; border-radius: 0 !important; }

body {
    font-family: 'Share Tech Mono', 'Courier New', monospace;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

.system-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.05) 50%);
    background-size: 100% 4px; pointer-events: none; z-index: 10; opacity: 0.2;
}

/* User Menu (Top Right) - ???? */
.user-profile-container { 
    position: fixed; 
    top: 20px; 
    right: 20px; /* ????? */
    left: auto;
    z-index: 1100; 
}
.user-trigger {
    background: var(--bg-navy); border: 1px solid var(--border-color); padding: 8px 15px;
    color: var(--accent); font-size: 0.8rem; cursor: pointer; display: flex; align-items: center; gap: 10px; transition: 0.3s;
}
.user-trigger:hover { border-color: var(--accent); box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }

.user-dropdown {
    position: absolute; 
    top: calc(100% + 5px); 
    right: 0; /* ??? */
    left: auto;
    width: 160px;
    background: var(--bg-navy); border: 1px solid var(--border-color); display: none; box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}
.user-dropdown.active { display: block; animation: fadeIn 0.2s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }
.user-dropdown button {
    width: 100%; padding: 12px; background: transparent; border: none; color: var(--text-primary);
    font-family: inherit; text-align: left; cursor: pointer; font-size: 0.75rem;
}
.user-dropdown button:hover { background: rgba(255, 68, 68, 0.1); color: #ff4444; }

.app-container { display: flex; height: 100vh; padding: 20px; gap: 20px; padding-top: 70px; }
.border-sharp { border: 1px solid var(--border-color); background: var(--bg-navy); }

/* Sidebar */
.sidebar { width: 350px; padding: 25px; display: flex; flex-direction: column; flex-shrink: 0; overflow-y: auto; }
.logo { font-size: 1.1rem; border-bottom: 2px solid var(--accent); padding-bottom: 10px; margin-bottom: 20px; letter-spacing: 3px; }

.nav-buttons { display: flex; gap: 10px; margin-bottom: 20px; }
.nav-btn {
    flex: 1; background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary);
    padding: 8px; cursor: pointer; font-family: inherit; transition: 0.3s;
}
.nav-btn.active { background: rgba(0, 212, 255, 0.1); color: var(--accent); border-color: var(--accent); font-weight: bold; }

/* Calendar */
.calendar-container { margin-bottom: 10px; }
.calendar-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 8px 5px; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-color); margin-bottom: 5px;
}
.calendar-header h3 { font-size: 0.8rem; text-align: center; margin: 0; flex: 1; }
.calendar-header button { background: none; border: none; color: var(--accent); cursor: pointer; padding: 5px 10px; }
.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 1px; background-color: var(--border-color); border: 1px solid var(--border-color); }
.calendar-grid span { aspect-ratio: 1/1; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; background: var(--bg-navy); cursor: pointer; }
.calendar-grid span:hover { background: var(--accent); color: var(--bg-deep); }
.calendar-grid span.today { color: var(--accent); font-weight: bold; box-shadow: inset 0 0 8px rgba(0, 212, 255, 0.3); }
.calendar-grid span.selected { background: var(--border-color); color: var(--accent); }

/* Main */
.main-content { flex: 1; display: flex; flex-direction: column; padding: 40px; overflow: hidden; }
.hidden { display: none !important; }
.system-header { border-left: 4px solid var(--accent); padding-left: 20px; margin-bottom: 30px; }
.input-wrapper { display: flex; border: 1px solid var(--border-color); }
#new-task-input { flex: 1; background: transparent; border: none; padding: 15px; color: var(--accent); outline: none; font-family: inherit; }
#add-task-btn { background: var(--accent); border: none; padding: 0 25px; font-weight: bold; cursor: pointer; }

.task-scroll-container { overflow-y: auto; flex: 1; }
.block-title { font-size: 0.75rem; background: var(--border-color); padding: 5px 15px; margin: 20px 0 10px 0; }
.task-item { display: flex; align-items: center; padding: 12px; border: 1px solid rgba(255, 255, 255, 0.05); margin-bottom: 5px; background: rgba(255, 255, 255, 0.02); }
.task-text { flex: 1; margin: 0 15px; font-size: 0.9rem; word-break: break-all; }
.completed .task-text { text-decoration: line-through; color: var(--text-secondary); opacity: 0.5; }
.delete-btn { background: transparent; border: 1px solid #444; color: #444; padding: 2px 8px; cursor: pointer; font-size: 0.7rem; }
.delete-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Checkbox Fix */
.checkbox-container {
    width: 22px; height: 22px; border: 1px solid var(--accent);
    position: relative; cursor: pointer; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
}
.checkbox-container input { opacity: 0; width: 100%; height: 100%; cursor: pointer; position: absolute; z-index: 2; }
.checkbox-container .checkmark { font-size: 16px; font-weight: bold; color: var(--accent); display: none; pointer-events: none; }
.checkbox-container input:checked + .checkmark { display: block; }

.system-stats { margin-top: auto; padding-top: 20px; }
.progress-frame { height: 4px; background: #111; margin: 10px 0; border: 1px solid var(--border-color); }
.progress-fill { height: 100%; background: var(--accent); transition: 0.5s; }
.stat-value { font-size: 0.75rem; color: var(--accent); text-align: right; }

/* Log View Specifics */
.log-date-header { font-size: 0.9rem; color: var(--accent); margin-top: 20px; margin-bottom: 5px; border-bottom: 1px solid rgba(0, 212, 255, 0.3); padding-bottom: 2px; }

/* Mobile */
.menu-toggle { display: none; position: fixed; top: 20px; left: 20px; z-index: 100; background: var(--bg-navy); border: 1px solid var(--border-color); color: var(--accent); padding: 10px; }
.menu-close { display: none; background: none; border: none; color: var(--accent); font-size: 1.5rem; margin-bottom: 20px; }

@media (max-width: 900px) {
    .sidebar { position: fixed; left: -100%; height: 100vh; z-index: 2000; transition: 0.3s; width: 280px; }
    .sidebar.open { left: 0; }
    .menu-toggle, .menu-close { display: block; }
    .user-profile-container { right: 20px; left: auto; } /* ??????????? */
    .app-container { padding-top: 80px; }
}