/* CSS variables specifically for To-Do List, matching main theme */
:root {
    --bg-primary: #070b14;
    --bg-secondary: #0d1322;
    --bg-card: rgba(19, 28, 48, 0.45);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(0, 242, 254, 0.25);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-blue: #00F2FE;
    --accent-indigo: #4FACFE;
    
    --priority-low: #10B981;
    --priority-medium: #F59E0B;
    --priority-high: #EF4444;
    
    --font-sans: 'Outfit', sans-serif;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 242, 254, 0.1);
}

/* Base resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    padding: 60px 0;
    position: relative;
    overflow-x: hidden;
}

/* Background blur circles */
.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -10;
    pointer-events: none;
    opacity: 0.35;
}

.bg-glow-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-blue) 0%, transparent 70%);
    top: -100px;
    right: -100px;
}

.bg-glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
}

.app-container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Styles */
.app-header {
    margin-bottom: 40px;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    transition: var(--transition-normal);
    margin-bottom: 24px;
}

.btn-back:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
    background: rgba(0, 242, 254, 0.05);
    transform: translateX(-4px);
}

.header-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.app-title {
    font-size: 2.2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
}

.title-icon {
    color: var(--accent-blue);
    width: 36px;
    height: 36px;
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Card layout */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Dashboard Statistics */
.dashboard-card {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 24px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-md);
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-right: 1px solid var(--border-color);
}

.stat-box:last-child {
    border-right: none;
}

.stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.text-active {
    color: var(--accent-blue);
}

.text-success {
    color: var(--priority-low);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.progress-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.circular-progress {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-circle {
    transition: stroke-dashoffset 0.35s;
    transform-origin: 50% 50%;
}

.progress-text {
    position: absolute;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-blue);
}

/* Todo Input Section */
.input-card {
    padding: 16px;
    margin-bottom: 24px;
    transition: var(--transition-normal);
}

.input-card:focus-within {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.todo-form {
    width: 100%;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 12px;
    align-items: center;
}

.input-field-wrap {
    position: relative;
    display: flex;
    align-items: center;
    flex-grow: 1;
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    width: 20px;
    height: 20px;
}

.input-field-wrap input {
    width: 100%;
    background: rgba(7, 11, 20, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px 12px 48px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.input-field-wrap input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(7, 11, 20, 0.7);
}

.select-field-wrap select {
    background: rgba(7, 11, 20, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    outline: none;
}

.select-field-wrap select:focus {
    border-color: var(--accent-blue);
    background: rgba(7, 11, 20, 0.7);
}

.btn-add {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-indigo) 100%);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    font-weight: 700;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-add:hover {
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
    transform: translateY(-1px);
}

/* Toolbar: Search and Filters */
.toolbar {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    margin-bottom: 20px;
    align-items: center;
}

.search-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    width: 16px;
    height: 16px;
}

.search-wrap input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 16px 10px 42px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    transition: var(--transition-fast);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.search-wrap input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.filters-wrap {
    display: flex;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: 10px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-primary);
}

.filter-btn.active {
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent-blue);
}

/* Todo List Cards */
.todo-list-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    overflow: hidden;
    margin-bottom: 16px;
}

.todo-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.todo-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
    animation: slideIn 0.3s cubic-bezier(0.1, 0.8, 0.2, 1);
}

.todo-item:last-child {
    border-bottom: none;
}

.todo-item:hover {
    background: rgba(255, 255, 255, 0.01);
}

.todo-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-grow: 1;
}

/* Custom Checkbox Design */
.todo-checkbox-wrap {
    position: relative;
    cursor: pointer;
}

.todo-checkbox-wrap input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    width: 22px;
    height: 22px;
    background: rgba(7, 11, 20, 0.4);
    border: 1.5px solid var(--text-muted);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    transition: var(--transition-fast);
}

.todo-checkbox-wrap:hover input ~ .checkmark {
    border-color: var(--accent-blue);
}

.todo-checkbox-wrap input:checked ~ .checkmark {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--bg-primary);
}

.checkmark i {
    width: 14px;
    height: 14px;
}

/* Task priority Indicator border styling */
.todo-item.priority-low { border-left: 4px solid var(--priority-low); }
.todo-item.priority-medium { border-left: 4px solid var(--priority-medium); }
.todo-item.priority-high { border-left: 4px solid var(--priority-high); }

.todo-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.todo-text {
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
    word-break: break-word;
}

.todo-item.completed .todo-text {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-meta {
    display: flex;
    align-items: center;
    gap: 8px;
}

.priority-tag {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 4px;
}

.priority-tag.low { background: rgba(16, 185, 129, 0.08); color: var(--priority-low); }
.priority-tag.medium { background: rgba(245, 158, 11, 0.08); color: var(--priority-medium); }
.priority-tag.high { background: rgba(239, 68, 68, 0.08); color: var(--priority-high); }

.todo-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.todo-date i {
    width: 12px;
    height: 12px;
}

/* Action buttons */
.btn-delete {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    opacity: 0.6;
}

.btn-delete:hover {
    color: var(--priority-high);
    background: rgba(239, 68, 68, 0.08);
    opacity: 1;
}

.btn-delete i {
    width: 18px;
    height: 18px;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px;
    color: var(--text-muted);
}

.empty-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.95rem;
}

/* List Footer */
.list-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.items-left {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.btn-clear-completed {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-clear-completed:hover {
    color: var(--priority-high);
}

.btn-clear-completed i {
    width: 14px;
    height: 14px;
}

/* App Footer */
.app-footer {
    text-align: center;
    margin-top: 40px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Keyframes */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjust */
@media (max-width: 768px) {
    body {
        padding: 30px 0;
    }
    
    .dashboard-card {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .stat-box {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 10px;
    }
    
    .stat-box:nth-child(3),
    .stat-box:nth-child(4) {
        border-bottom: none;
        padding-bottom: 0;
        padding-top: 10px;
    }
    
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .select-field-wrap select {
        width: 100%;
    }
    
    .btn-add {
        width: 100%;
        justify-content: center;
    }
    
    .toolbar {
        grid-template-columns: 1fr;
    }
    
    .filters-wrap {
        justify-content: space-between;
    }
    
    .filter-btn {
        flex-grow: 1;
        text-align: center;
    }
    
    .list-footer {
        flex-direction: column;
        gap: 12px;
        align-items: center;
        text-align: center;
    }
}