/* --- TaskMaster Pro Redesign - Scale.com Inspired --- */

/* --- 1. Variables & Base --- */
:root {
    /* --- Color Palette (Scale Inspired - Dark Primary) --- */
    --scale-accent: #00f0ff;         /* Bright Cyan/Teal Accent */
    --scale-accent-hover: #66faff;    /* Lighter hover for accent */
    --scale-accent-glow: rgba(0, 240, 255, 0.15); /* Glow effect */
    --scale-accent-subtle-bg: rgba(0, 240, 255, 0.08); /* Subtle background */
    --scale-accent-text-on-color: #0a0a0f; /* Dark text on accent */

    --scale-bg-primary: #0a0a0f;      /* Near Black */
    --scale-bg-secondary: #14151a;    /* Slightly lighter for cards/sidebar */
    --scale-bg-tertiary: #1f2027;     /* Lighter for inputs/hovers */
    --scale-bg-hover: #2a2c34;        /* Hover background */
    --scale-text-primary: #f0f2f5;     /* Off-white */
    --scale-text-secondary: #818899;   /* Grey */
    --scale-border-color: #2a2c34;     /* Subtle border */
    --scale-shadow-color: rgba(0, 240, 255, 0.1); /* Subtle accent shadow */

    /* Functional Colors */
    --danger-color: #ff4d6a;
    --warning-color: #f5a623;
    --success-color: #3ddc84;
    --info-color: #4a90e2; /* Keep blue for "Today" maybe? */

    /* --- General Settings --- */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --border-radius: 6px;
    --border-radius-small: 4px;
    --transition-fast: 0.15s ease-out;
    --transition-medium: 0.25s ease-out;

    /* --- Initialize Theme Vars (Dark Default) --- */
    --bg-primary: var(--scale-bg-primary);
    --bg-secondary: var(--scale-bg-secondary);
    --bg-tertiary: var(--scale-bg-tertiary);
    --bg-hover: var(--scale-bg-hover);
    --text-primary: var(--scale-text-primary);
    --text-secondary: var(--scale-text-secondary);
    --border-color: var(--scale-border-color);
    --shadow-color: var(--scale-shadow-color);
    --accent: var(--scale-accent);
    --accent-hover: var(--scale-accent-hover);
    --accent-glow: var(--scale-accent-glow);
    --accent-subtle-bg: var(--scale-accent-subtle-bg);
    --accent-text-on-color: var(--scale-accent-text-on-color);
    --scrollbar-thumb: #3a3d4b;
    --scrollbar-track: var(--bg-primary);
}

/* --- Light Theme (Optional - Simple Inversion for Contrast) --- */
.light-theme {
    /* You'd need to define a full light palette inspired by Scale if needed */
    /* This is a basic placeholder inversion */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f8fa;
    --bg-tertiary: #e9ebee;
    --bg-hover: #dfe1e6;
    --text-primary: #0a0a0f;
    --text-secondary: #5e6c84;
    --border-color: #e3e5e9;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent: var(--scale-accent); /* Keep accent */
    --accent-hover: #00c0cc; /* Darker hover for light */
    --accent-glow: rgba(0, 240, 255, 0.15);
    --accent-subtle-bg: rgba(0, 240, 255, 0.1);
    --accent-text-on-color: #0a0a0f;
    --scrollbar-thumb: #b3b9c4;
    --scrollbar-track: var(--bg-primary);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 15px; }

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.55; /* More breathing room */
    display: flex;
    min-height: 100vh;
    overflow: hidden;
    transition: background-color var(--transition-medium), color var(--transition-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 4px; }
::-webkit-scrollbar-thumb { background-color: var(--scrollbar-thumb); border-radius: 4px; border: 2px solid var(--scrollbar-track); }
::-webkit-scrollbar-thumb:hover { background-color: color-mix(in srgb, var(--scrollbar-thumb) 80%, var(--text-secondary) 20%); }


/* --- 2. Base UI Elements --- */
button {
    font-family: inherit; cursor: pointer; border: none; background: none; color: inherit;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}
button:active { transform: scale(0.97); }

ul { list-style: none; }

input[type="text"], input[type="search"], input[type="date"], textarea, select {
    font-family: inherit;
    background-color: var(--bg-secondary); /* Darker input background */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius); /* Slightly more rounded */
    padding: 9px 12px; /* Consistent padding */
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 100%;
    outline: none;
    transition: border-color var(--transition-medium), box-shadow var(--transition-medium), background-color var(--transition-medium);
}
input[type="text"]:focus, input[type="search"]:focus, input[type="date"]:focus, textarea:focus, select:focus {
    border-color: var(--accent);
    background-color: var(--bg-primary); /* Match app bg on focus */
    box-shadow: 0 0 0 3px var(--accent-glow);
}
textarea { resize: vertical; min-height: 75px; }
input[type="date"], select { cursor: pointer; }
body.dark-theme input[type="date"] { color-scheme: dark; }
body.light-theme input[type="date"] { color-scheme: light; }

/* Placeholder */
::-webkit-input-placeholder { color: var(--text-secondary); opacity: 0.5; }
::-moz-placeholder { color: var(--text-secondary); opacity: 0.5; }
:-ms-input-placeholder { color: var(--text-secondary); opacity: 0.5; }
:-moz-placeholder { color: var(--text-secondary); opacity: 0.5; }

/* Icons */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 20;
  vertical-align: -0.2em; /* Fine-tuned alignment */
  font-size: 1.25em;
  line-height: 1;
  display: inline-block;
  flex-shrink: 0;
}

/* Buttons */
.button-primary {
    background-color: var(--accent);
    color: var(--accent-text-on-color);
    padding: 9px 18px; /* Slightly larger */
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid var(--accent);
    box-shadow: 0 2px 5px rgba(0, 240, 255, 0.1); /* Subtle glow */
}
.button-primary:hover { background-color: var(--accent-hover); border-color: var(--accent-hover); }

.button-secondary {
    background-color: transparent;
    color: var(--text-secondary);
    padding: 9px 18px;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}
.button-secondary:hover { background-color: var(--bg-tertiary); border-color: var(--text-secondary); color: var(--text-primary); }

/* --- 3. Structure --- */
.app-container { display: flex; width: 100%; height: 100vh; }

/* --- 4. Sidebar --- */
.sidebar {
    width: 240px; /* Slightly narrower */
    background-color: var(--bg-primary); /* Match main bg */
    padding: 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
    position: relative;
    transition: background-color var(--transition-medium);
}

.sidebar-header {
    display: flex; align-items: center; padding: 15px 18px; /* Adjusted padding */
    border-bottom: 1px solid var(--border-color); flex-shrink: 0;
    transition: border-color var(--transition-medium);
}
.logo-icon { font-size: 1.7em; color: var(--accent); margin-right: 8px; }
.logo-text { font-size: 1.1rem; font-weight: 600; margin-right: auto; letter-spacing: 0.5px; } /* Added letter spacing */
.theme-toggle-btn { padding: 6px; border-radius: 50%; margin-left: 10px; color: var(--text-secondary); }
.theme-toggle-btn:hover { background-color: var(--bg-tertiary); color: var(--text-primary); }
/* Theme Icons */
.theme-toggle-btn .material-symbols-outlined { font-size: 1.3em; }
.theme-toggle-btn .dark-icon { display: none; }
.light-theme .theme-toggle-btn .dark-icon { display: block; }
.light-theme .theme-toggle-btn .light-icon { display: none; }

.navigation { flex-grow: 1; overflow-y: auto; padding: 10px 8px; }
.nav-section-header {
    font-size: 0.7rem; font-weight: 600; color: var(--text-secondary);
    text-transform: uppercase; padding: 15px 10px 5px 10px; /* Adjusted padding */
    letter-spacing: 0.8px; user-select: none; opacity: 0.8;
}

.nav-list { margin-bottom: 10px; }
.nav-item {
    display: flex; align-items: center; padding: 9px 10px; /* Adjusted padding */
    margin: 0 0 4px 0; border-radius: var(--border-radius); cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    color: var(--text-secondary); position: relative;
}
.nav-item:hover { background-color: var(--bg-tertiary); color: var(--text-primary); }
.nav-item.active {
    background-color: var(--accent-subtle-bg); /* Subtle accent bg */
    color: var(--accent);
    font-weight: 500;
}
.nav-item.active::before { /* Accent Indicator */
    content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 3px;
    background-color: var(--accent); border-radius: 3px;
}
.nav-item.active .project-icon { color: var(--accent); }
.nav-item.active .task-count { background-color: var(--accent); color: var(--accent-text-on-color); }

.nav-item .project-icon { margin-right: 10px; font-size: 1.2em; transition: color var(--transition-fast); }
.nav-item .project-name { flex-grow: 1; font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: 8px; }
.task-count {
    margin-left: auto; background-color: var(--bg-tertiary); color: var(--text-secondary);
    font-size: 0.7rem; padding: 1px 6px; border-radius: 8px; font-weight: 600; /* Bolder count */
    flex-shrink: 0; transition: background-color var(--transition-fast), color var(--transition-fast);
    min-width: 18px; text-align: center;
}
.nav-item .delete-project-btn {
    /* Styles remain similar, ensure visibility on hover */
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%); padding: 3px; border-radius: 50%; font-size: 1em; line-height: 1; opacity: 0; color: var(--text-secondary);
    transition: opacity var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}
.nav-item:hover .delete-project-btn { opacity: 0.7; }
.nav-item .delete-project-btn:hover { opacity: 1; background-color: var(--bg-tertiary); color: var(--danger-color); }
.nav-item[data-project-id="inbox"] .delete-project-btn { display: none !important; }

/* No projects message */
.no-projects-message { text-align: center; padding: 30px 15px; color: var(--text-secondary); font-size: 0.85rem; }
.no-projects-message.hidden { display: none; }
.no-projects-message .material-symbols-outlined { font-size: 2.8em; display: block; margin-bottom: 10px; opacity: 0.3; }

/* Add project area */
.add-project-btn {
    display: flex; align-items: center; width: calc(100% - 16px); margin: 10px 8px 5px 8px; /* Added bottom margin */
    padding: 8px 10px; border-radius: var(--border-radius); color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    text-align: left; flex-shrink: 0; font-size: 0.9rem;
}
.add-project-btn:hover { background-color: var(--bg-tertiary); color: var(--text-primary); }
.add-project-btn .material-symbols-outlined { margin-right: 10px; font-size: 1.3em; }
.add-project-btn.hidden { display: none; }
.add-project-input-container { display: flex; align-items: center; gap: 6px; padding: 8px; margin: 0 8px 5px 8px; flex-shrink: 0; }
.add-project-input-container.hidden { display: none; }
.add-project-input-container input { flex-grow: 1; font-size: 0.85rem; background-color: var(--bg-secondary); } /* Match input style */
#new-project-icon { flex-shrink: 0; width: auto; padding: 5px; font-size: 1rem; appearance: none; text-align: center; background-color: var(--bg-secondary); border-color: var(--border-color); color: var(--text-primary); border-radius: var(--border-radius-small); }
.add-project-input-container button { padding: 5px; border-radius: var(--border-radius-small); color: var(--text-secondary); flex-shrink: 0; }
.add-project-input-container button:hover { background-color: var(--bg-tertiary); color: var(--text-primary); }
.add-project-input-container button .material-symbols-outlined { font-size: 1.2em; display: block; }


/* --- 5. Main Content --- */
.main-content { flex-grow: 1; display: flex; flex-direction: column; height: 100vh; background-color: var(--bg-primary); transition: background-color var(--transition-medium); }
.main-header {
    padding: 18px 30px; /* Consistent padding */ border-bottom: 1px solid var(--border-color); flex-shrink: 0;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px;
    transition: border-color var(--transition-medium);
}
.header-left { flex-grow: 1; min-width: 150px; }
.header-right { display: flex; align-items: center; gap: 15px; flex-wrap: wrap; }
.main-header h2 { font-size: 1.6rem; font-weight: 600; letter-spacing: -0.5px; } /* Tighter heading */

/* Search */
.search-container { position: relative; display: flex; align-items: center; min-width: 220px; max-width: 350px; flex-grow: 1; }
.search-container .search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-secondary); pointer-events: none; font-size: 1.2em; opacity: 0.7; }
#search-input { padding-left: 38px; font-size: 0.9rem; border-radius: var(--border-radius); background-color: var(--bg-secondary); } /* Match input style */
#search-input:focus { background-color: var(--bg-primary); }

/* View Options */
.view-options { display: flex; align-items: center; gap: 15px; }
.view-options label, .view-options select { font-size: 0.85rem; color: var(--text-secondary); }
.filter-toggle { display: flex; align-items: center; cursor: pointer; gap: 8px; }
.filter-toggle input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; margin: 0; border-radius: 3px; } /* Slightly rounded checkbox */
.filter-toggle span { user-select: none; }
#sort-options { padding: 5px 10px; border-radius: var(--border-radius); font-size: 0.85rem; border: 1px solid var(--border-color); background-color: var(--bg-secondary); appearance: none; } /* Cleaner select */

/* --- 6. Task Area --- */
.task-area { flex-grow: 1; padding: 0 30px 15px 30px; display: flex; flex-direction: column; overflow: hidden; position: relative; }
.task-list { flex-grow: 1; overflow-y: auto; padding: 20px 5px; margin: 0 -5px; }

/* No Tasks Message */
.no-tasks-message {
    display: none; flex-direction: column; align-items: center; justify-content: center; text-align: center;
    padding: 50px 20px; height: 100%; pointer-events: none; user-select: none; color: var(--text-secondary); opacity: 0.5; /* More subtle */
}
.no-tasks-message .material-symbols-outlined { font-size: 4em; margin-bottom: 20px; color: var(--text-secondary); opacity: 0.5; }
.no-tasks-message .message-title { font-size: 1.2rem; font-weight: 500; color: var(--text-primary); margin-bottom: 8px; }
.no-tasks-message .message-subtitle { font-size: 0.9rem; margin-bottom: 30px; max-width: 320px; line-height: 1.6; }
.no-tasks-message .add-first-task-btn { /* Use primary button style */ pointer-events: all; }
.task-list:empty ~ .no-tasks-message { display: flex; }
.task-list:empty + .show-add-task-form-btn { border-top: none; }

/* Add Task Button */
.show-add-task-form-btn {
    display: flex; align-items: center; color: var(--text-secondary); padding: 12px 5px; font-size: 0.95rem;
    width: 100%; text-align: left; border-top: 1px solid var(--border-color); margin-top: auto; flex-shrink: 0;
    transition: color var(--transition-fast), border-color var(--transition-medium);
}
.show-add-task-form-btn:hover { color: var(--accent); }
.show-add-task-form-btn .material-symbols-outlined { margin-right: 10px; font-size: 1.4em; transition: color var(--transition-fast); }
.show-add-task-form-btn:hover .material-symbols-outlined { color: var(--accent); }

/* --- 7. Task Item --- */
@keyframes fadeInTask { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOutTask { from { opacity: 1; transform: scale(1); } to { opacity: 0; transform: scale(0.97); } }

.task-item {
    display: flex; align-items: flex-start; padding: 10px 10px 10px 15px; /* Adjusted padding */
    margin: 0 0 10px 0; border-radius: var(--border-radius); background-color: var(--bg-secondary);
    border: 1px solid var(--border-color); /* Add subtle border */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05); position: relative;
    transition: background-color var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium), opacity var(--transition-medium), transform var(--transition-medium);
}
.task-item.fade-in { animation: fadeInTask 0.3s ease-out forwards; }
.task-item.fade-out { animation: fadeOutTask 0.25s ease-in forwards; }

.task-item:hover {
     border-color: var(--accent);
     background-color: var(--bg-tertiary);
     box-shadow: 0 4px 8px var(--shadow-color);
     /* transform: translateY(-1px); Optional */
}

/* Priority Indicator (Dot) */
.task-priority-indicator {
    position: absolute; left: 6px; top: 16px; /* Position near checkbox */
    width: 6px; height: 6px; border-radius: 50%; background-color: transparent;
    transition: background-color var(--transition-medium);
}
.task-item[data-priority="1"] .task-priority-indicator { background-color: var(--danger-color); }
.task-item[data-priority="2"] .task-priority-indicator { background-color: var(--warning-color); }
.task-item[data-priority="3"] .task-priority-indicator { background-color: var(--info-color); }
.task-item.completed .task-priority-indicator { opacity: 0.4; }

.task-content { flex-grow: 1; display: flex; align-items: flex-start; padding: 0; min-width: 0; }

/* Complete Button (Checkbox style) */
.complete-btn {
    margin-top: 2px; margin-right: 12px; padding: 0; border-radius: 50%; display: flex; flex-shrink: 0;
    width: 20px; height: 20px; align-items: center; justify-content: center;
    border: 1.5px solid var(--text-secondary); /* Outline */
    color: var(--accent); /* Color for checkmark */
    background-color: transparent;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}
.complete-btn:hover { border-color: var(--accent); background-color: var(--accent-subtle-bg); }
.complete-btn .material-symbols-outlined {
    font-size: 1.1em; display: block; opacity: 0; /* Hide icons initially */
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    transform: scale(0.5);
    font-variation-settings: 'FILL' 1, 'wght' 500; /* Filled, bolder check */
}
.task-item.completed .complete-btn {
    background-color: var(--accent);
    border-color: var(--accent);
}
.task-item.completed .complete-btn .checked-icon { opacity: 1; transform: scale(1); color: var(--accent-text-on-color); }
.task-item.completed .complete-btn:hover { background-color: var(--accent-hover); border-color: var(--accent-hover); }

/* Task Details */
.task-details { padding-top: 0; min-width: 0; flex-grow: 1; }
.task-name {
    font-weight: 500; font-size: 1rem; /* Slightly larger */ cursor: pointer;
    transition: color var(--transition-fast); display: block; line-height: 1.45;
    word-break: break-word; margin-bottom: 4px; color: var(--text-primary); /* Ensure primary color */
}
.task-item:hover .task-name { color: var(--accent); }
.task-description {
    font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; line-height: 1.5;
    display: none; transition: color var(--transition-fast); word-break: break-word;
    max-width: 100%;
}
.task-item .task-description:not(:empty) { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.task-item:hover .task-description:not(:empty) { display: block; -webkit-line-clamp: unset; }

/* Subtasks */
.subtask-section { margin-top: 10px; padding-left: 0; }
.subtask-list { margin-bottom: 6px; display: flex; flex-direction: column; gap: 5px; }
.subtask-item { display: flex; align-items: center; font-size: 0.85rem; color: var(--text-secondary); padding: 2px 0; position: relative; }
.subtask-item.completed { opacity: 0.7; }
.subtask-item.completed .subtask-name { text-decoration: line-through; }
.complete-subtask-btn { margin-right: 8px; padding: 1px; display: flex; color: var(--text-secondary); cursor: pointer; }
.complete-subtask-btn .material-symbols-outlined { font-size: 1.2em; }
.complete-subtask-btn .checked-icon { display: none; color: var(--accent); } /* Use accent for subtask check */
.subtask-item.completed .complete-subtask-btn .unchecked-icon { display: none; }
.subtask-item.completed .complete-subtask-btn .checked-icon { display: block; }
.subtask-item:not(.completed) .complete-subtask-btn:hover { color: var(--accent); }
.subtask-name { flex-grow: 1; margin-right: 5px; transition: opacity var(--transition-fast), text-decoration var(--transition-fast); }
.delete-subtask-btn { font-size: 1.1em; color: var(--text-secondary); padding: 0 4px; opacity: 0; transition: opacity var(--transition-fast), color var(--transition-fast); }
.subtask-item:hover .delete-subtask-btn { opacity: 0.6; }
.delete-subtask-btn:hover { opacity: 1; color: var(--danger-color); }
.toggle-add-subtask-btn { color: var(--text-secondary); font-size: 0.8rem; display: inline-flex; align-items: center; gap: 4px; padding: 3px 0; margin-top: 5px; }
.toggle-add-subtask-btn:hover { color: var(--accent); }
.toggle-add-subtask-btn .material-symbols-outlined { font-size: 1.1em; }
.add-subtask-inline { display: flex; gap: 5px; margin-top: 5px; }
.add-subtask-inline.hidden { display: none; }
.add-subtask-input { flex-grow: 1; font-size: 0.85rem; padding: 5px 8px; } /* Consistent input style */
.save-subtask-btn { padding: 4px 6px; background-color: var(--bg-tertiary); border-radius: var(--border-radius-small); }
.save-subtask-btn:hover { background-color: var(--bg-hover); color: var(--accent); }
.save-subtask-btn .material-symbols-outlined { font-size: 1.1em; }

/* Task Metadata */
.task-meta {
    margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px;
    font-size: 0.8rem; color: var(--text-secondary); align-items: center;
}
.due-date, .subtask-progress { display: inline-flex; align-items: center; gap: 5px; transition: color var(--transition-fast), background-color var(--transition-fast); padding: 3px 8px; background-color: transparent; border: 1px solid var(--border-color); border-radius: 10px; /* Pill shape */ }
.due-date .material-symbols-outlined, .subtask-progress .material-symbols-outlined { font-size: 1em; margin-right: 2px; }
.due-date.overdue { border-color: var(--danger-color); color: var(--danger-color); background-color: rgba(255, 77, 106, 0.05); }
.due-date.today { border-color: var(--info-color); color: var(--info-color); background-color: rgba(74, 144, 226, 0.05); }
.task-item:not([data-due-date]) .due-date, .task-item:not([data-has-subtasks]) .subtask-progress { display: none; }

/* Task Actions */
.task-actions { display: flex; align-items: center; flex-shrink: 0; padding: 5px 0; margin-left: 12px; opacity: 0; transition: opacity var(--transition-medium); }
.task-item:hover .task-actions { opacity: 1; }
.task-actions button { color: var(--text-secondary); padding: 6px; border-radius: 50%; margin-left: 5px; display: flex; }
.task-actions button:hover { background-color: var(--bg-tertiary); color: var(--text-primary); }
.task-actions button .material-symbols-outlined { font-size: 1.1em; }
.task-actions .delete-btn:hover { color: var(--danger-color); }

/* Completed Task Styles */
.task-item.completed { opacity: 0.5; } /* More dimmed */
.task-item.completed:hover { opacity: 0.7; }
.task-item.completed .task-name, .task-item.completed .task-description { text-decoration: line-through; color: var(--text-secondary); }
.task-item.completed .task-priority-indicator { opacity: 0.3; }
.task-item.completed .task-meta { opacity: 0.7; }
.task-item.completed .due-date { text-decoration: line-through; border-color: var(--border-color); background-color: transparent; color: var(--text-secondary); }

/* --- 8. Modal --- */
.modal-backdrop { position: fixed; inset: 0; background-color: rgba(10, 10, 15, 0.7); /* Darker backdrop */ z-index: 99; transition: opacity var(--transition-medium); }
.modal-backdrop.hidden { opacity: 0; pointer-events: none; }
.task-form-modal {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.95);
    background-color: var(--bg-secondary); border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3); /* Stronger shadow */
    z-index: 100; width: 90%; max-width: 580px; /* Slightly wider */
    overflow: hidden; transition: opacity var(--transition-medium), transform var(--transition-medium), border-color var(--transition-medium), background-color var(--transition-medium);
    opacity: 0;
}
.task-form-modal:not(.hidden) { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.task-form-modal.hidden { pointer-events: none; }
.task-form-content { padding: 25px 30px; position: relative; }
#task-form-title { font-size: 1.4rem; font-weight: 600; margin-bottom: 25px; color: var(--text-primary); }
.task-form-content input, .task-form-content textarea, .task-form-content select { margin-bottom: 18px; font-size: 0.95rem; } /* More spacing */
.task-form-row { display: flex; gap: 18px; margin-bottom: 18px; flex-wrap: wrap; }
.form-field { flex: 1; min-width: 190px; }
.form-field label { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 6px; }
.form-field label .material-symbols-outlined { font-size: 1.1em; }
.form-actions { display: flex; gap: 10px; margin-top: 25px; border-top: 1px solid var(--border-color); padding-top: 20px; justify-content: flex-end; transition: border-color var(--transition-medium); }
#save-task-modal-btn { order: 2; } /* Use primary button style */
#cancel-task-modal-btn { order: 1; } /* Use secondary button style */
.close-modal-btn { position: absolute; top: 15px; right: 15px; font-size: 1.8em; color: var(--text-secondary); padding: 5px; line-height: 1; background: none; border: none; }
.close-modal-btn:hover { color: var(--text-primary); }

/* --- 9. Toast Notification --- */
.notification-toast {
    position: fixed; bottom: 25px; right: 25px; /* Position bottom-right */
    transform: translateY(120px); /* Start off-screen */
    background-color: var(--bg-tertiary); color: var(--text-primary); padding: 12px 20px;
    border-radius: var(--border-radius); box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 110; font-size: 0.9rem; opacity: 0; border-left: 4px solid var(--accent); /* Default accent */
    transition: transform 0.4s cubic-bezier(0.2, 0.9, 0.3, 1.2), opacity 0.4s ease-out, background-color var(--transition-medium), border-color var(--transition-medium);
}
.notification-toast.danger { border-left-color: var(--danger-color); }
.notification-toast.success { border-left-color: var(--success-color); }
.notification-toast.warning { border-left-color: var(--warning-color); }
.notification-toast:not(.hidden) { opacity: 1; transform: translateY(0); }

/* --- 10. Responsiveness --- */
@media (max-width: 992px) { /* Tablet */
    .sidebar { width: 220px; }
    .main-header { padding: 15px 25px; }
    .task-area { padding: 0 25px 15px 25px; }
}

@media (max-width: 768px) { /* Mobile */
    html { font-size: 14px; }
    body { overflow: auto; }
    .app-container { flex-direction: column; height: auto; }
    .sidebar { width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
    .navigation { max-height: 250px; }
    .main-content { height: auto; }
    .main-header { padding: 12px 15px; flex-direction: column; align-items: stretch; gap: 12px; }
    .header-right { gap: 12px; }
    .search-container { min-width: 0; max-width: none; }
    .task-area { padding: 0 15px 10px 15px; }
    .task-list { padding: 15px 0; }
    .task-item { padding: 10px 10px 10px 12px; }
    .task-actions { opacity: 1; }
    .task-form-modal { width: calc(100% - 20px); max-width: 95%; top: 10px; transform: translate(-50%, 0) scale(1); max-height: calc(100vh - 20px); overflow-y: auto; border-radius: var(--border-radius); left: 50%; }
    .task-form-content { padding: 20px; }
    .form-actions { flex-direction: column-reverse; gap: 10px; align-items: stretch; }
    .notification-toast { width: calc(100% - 30px); bottom: 15px; left: 15px; right: 15px; transform: translateY(120px); }
    .notification-toast:not(.hidden) { transform: translateY(0); }
}