/* Global Styles */
body {
    font-family: 'Arial', sans-serif;
    background-color: #1a1a1a;
    color: #f2f2f2;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
    overflow-x: hidden;
}

.hidden { display: none !important; }
.error-message { color: #e74c3c; margin-top: 15px; min-height: 1.2em; }

/* Auth Component Styles */
#auth-container { display: flex; justify-content: center; align-items: center; min-height: 80vh; padding: 20px; box-sizing: border-box; }
.auth-box { width: 100%; max-width: 400px; background-color: #2b2b2b; padding: 30px; border-radius: 10px; box-shadow: 0 0 20px rgba(0, 0, 0, 0.5); text-align: center; }
.auth-box h1 { color: #3498db; margin-top: 0; }
.auth-form-container { margin-top: 20px; }
.auth-form input { width: 100%; padding: 12px; margin-bottom: 15px; border: 1px solid #555; background-color: #252525; color: #f2f2f2; border-radius: 5px; box-sizing: border-box; }
.auth-form button { width: 100%; padding: 12px; background-color: #3498db; color: #fff; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; transition: background-color 0.3s; }
.auth-form button:hover { background-color: #2980b9; }
.auth-switch { margin-top: 20px; font-size: 0.9em; }
.auth-switch a { color: #3498db; text-decoration: none; cursor: pointer; }

/* Main App Component Styles */
.container { max-width: 800px; margin: 0 auto; background-color: #2b2b2b; border-radius: 10px; box-shadow: 0 0 20px rgba(0, 0, 0, 0.5); padding: 20px; }
header { border-bottom: 2px solid #3498db; padding-bottom: 10px; margin-bottom: 20px; }
.header-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px; }
header h1 { color: #3498db; text-transform: uppercase; letter-spacing: 2px; margin: 0; }
#user-info { display: flex; align-items: center; gap: 15px; }
#user-email { font-size: 0.9em; color: #ccc; }
#logout-button { background-color: #e74c3c; color: #fff; border: none; padding: 8px 12px; border-radius: 5px; cursor: pointer; transition: background-color 0.3s; }
#logout-button:hover { background-color: #c0392b; }

/* --- To-Do Button and Modal Styles --- */
.add-todo-btn-container {
    margin-bottom: 20px;
    text-align: center;
}
#show-add-todo-btn {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
}
#show-add-todo-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}
.modal-content {
    background-color: #333; /* Borrowing from .todo-list-container */
    padding: 25px;
    border-radius: 8px; /* Borrowing from li */
    border: 1px solid #444;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 5px 25px rgba(0,0,0,0.4);
}
.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    color: #aaa;
    font-size: 2em;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}
.modal-close-btn:hover { color: #f2f2f2; }

/* Layout Styles */ 
.main-layout {
    display: grid;
    grid-template-columns: 1fr; /* Single column on mobile */
    gap: 20px;
}

@media (min-width: 768px) {
    .main-layout {
        grid-template-columns: 2fr 1fr; /* Two columns on wider screens */
        align-items: flex-start; /* Prevents columns from stretching to equal height */
    }
}

.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px; /* Space between button and completed list */
}

#show-add-todo-btn {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
    width: 100%; /* Make button fill its container */
    box-sizing: border-box; /* Ensure padding is included in the width */
}
#show-add-todo-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

/* Form Styles (within modal) */
.form-title-header { display: flex; justify-content: space-between; align-items: center; }
.form-title-header h2 { margin: 0 0 20px 0; color: #ccc; font-size: 1.4em; width: 100%; text-align: center; }
#todo-form { display: flex; flex-direction: column; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 20px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.span-2 { grid-column: 1 / -1; }
.form-group label { font-size: 0.9em; color: #aaa; }
#todo-input, #tag-input, #initial-date-input, #recur-type, select, input[type="number"] { width: 100%; padding: 10px; border: 1px solid #555; background-color: #252525; color: #f2f2f2; border-radius: 5px; box-sizing: border-box; }
.recurrence-options { display: flex; flex-wrap: wrap; gap: 10px; background-color: #2b2b2b; padding: 10px; border-radius: 5px; }
.recurrence-options.hidden { display: none; }
.recurrence-options label { display: flex; align-items: center; gap: 5px; cursor: pointer; color: #f2f2f2; }
#todo-form button[type="submit"] { background-color: #3498db; color: #fff; border: none; padding: 12px 20px; border-radius: 5px; cursor: pointer; transition: background-color 0.3s; align-self: flex-end; font-size: 1em; }
#todo-form button[type="submit"]:hover { background-color: #2980b9; }

/* To-Do List Styles */
/*.todo-lists { display: grid; grid-template-columns: 1fr; gap: 20px; }*/
@media (min-width: 768px) { .todo-lists { grid-template-columns: 1fr 1fr; } }
.todo-list-container { background-color: #333; padding: 15px; border-radius: 5px; }
.todo-list-container h2 { color: #3498db; border-bottom: 1px solid #444; padding-bottom: 5px; margin-top: 0; }
ul { list-style-type: none; padding: 0; margin: 0; }
li { background-color: #444; padding: 15px; border-radius: 5px; margin-bottom: 10px; display: flex; gap: 15px; transition: background-color 0.3s; align-items: flex-start; }
li.completed { background-color: #2c3e50; opacity: 0.7; }
li.completed .todo-details { text-decoration: line-through; }
.complete-btn-container .complete-btn { min-width: 22px; height: 22px; border-radius: 50%; border: 2px solid #aaa; background-color: transparent; cursor: pointer; transition: all 0.2s; padding: 0; }
.complete-btn-container .complete-btn:hover { border-color: #3498db; }
li.past-due .complete-btn-container .complete-btn { border-color: #e74c3c; background-color: rgba(231, 76, 60, 0.2); }
.todo-details { display: flex; flex-direction: column; gap: 8px; flex-grow: 1; }
.todo-text-container { display: flex; align-items: center; gap: 8px; }
.todo-text { font-size: 1.1em; }
.todo-text-container input { font-size: 1.1em; flex-grow: 1; background-color: #555; color: #f2f2f2; border: 1px solid #666; padding: 4px; border-radius: 3px; }
.todo-meta { font-size: 0.9em; color: #aaa; display: flex; align-items: center; gap: 8px; }
.tags-container { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 5px; }
.tag { color: #fff; padding: 3px 8px; border-radius: 12px; font-size: 0.8em; }

.actions { display: flex; flex-direction: row; gap: 5px; align-items: center; }
.icon-btn { background: none; border: none; padding: 4px; cursor: pointer; color: #aaa; display: inline-flex; align-items: center; justify-content: center; border-radius: 5px; transition: color 0.2s ease, background-color 0.2s ease; }
.icon-btn svg { width: 16px; height: 16px; stroke-width: 2.5; }
.icon-btn:hover { color: #f2f2f2; background-color: #555; }
.icon-btn.delete-btn:hover { color: #fff; background-color: #e74c3c; }
.edit-name-btn { visibility: hidden; opacity: 0; transition: visibility 0s, opacity 0.2s linear; }
li:hover .edit-name-btn { visibility: visible; opacity: 1; }

/* Edit Controls Styles */
.edit-controls, .edit-recurrence-controls { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; padding: 15px; background-color: #3a3a3a; border-radius: 5px; border: 1px solid #555; }
.edit-controls input, .edit-recurrence-controls input, .edit-recurrence-controls select { width: 100%; padding: 8px; background-color: #555; border: 1px solid #666; color: #f2f2f2; border-radius: 5px; box-sizing: border-box; }
.recurrence-options-editor { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.recurrence-options-editor label { display: flex; align-items: center; gap: 5px; font-size: 0.9em; }
.recurrence-options-editor input[type="checkbox"] { width: auto; }
.recurrence-options-editor select { flex-grow: 1; }
.edit-btn-container { display: flex; gap: 10px; justify-content: flex-end; margin-top: 5px; }
.edit-btn-container button { padding: 6px 12px; border: none; border-radius: 5px; cursor: pointer; font-size: 0.9em; transition: background-color 0.2s; }
.edit-btn-container .save-btn, .edit-controls .save-btn { background-color: #3498db; color: white; }
.edit-btn-container .save-btn:hover, .edit-controls .save-btn:hover { background-color: #2980b9; }
.edit-btn-container .cancel-btn { background-color: #666; color: white; }
.edit-btn-container .cancel-btn:hover { background-color: #777; }

/* Confetti Styles */
.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    background-color: var(--color);
    border-radius: 5px;
    top: var(--y);
    left: var(--x);
    transform: rotate(var(--r, 0));
    animation: confetti-fall 1.5s ease-out forwards;
    pointer-events: none;
    z-index: 9999;
}
@keyframes confetti-fall {
    from {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
    to {
        opacity: 0;
        transform: translateY(400px) translateX(var(--tx)) rotate(var(--r-end));
    }
}