:root {
    --bg-cream: #F5F0E6;
    --bg-dark: #1a1a1a;
    --black: #000000;
    --yellow: #FFE600;
    --coral: #FF6B6B;
    --border-width: 3px;
}

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

body {
    background-color: var(--bg-dark);
    font-family: 'Space Grotesk', sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 12px;
}

.app-container {
    background-color: var(--bg-cream);
    border: var(--border-width) solid var(--black);
    max-width: 480px;
    width: 100%;
    min-height: calc(100vh - 24px);
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 8px 8px 0 var(--black);
}

/* Header */
.header {
    padding: 16px;
    border-bottom: var(--border-width) solid var(--black);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1;
}

.date-badge {
    background: var(--yellow);
    border: var(--border-width) solid var(--black);
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 12px;
    box-shadow: 3px 3px 0 var(--black);
}

.task-counter {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    color: var(--black);
    opacity: 0.7;
}

/* Categories */
.categories {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: var(--border-width) solid var(--black);
    overflow-x: auto;
    flex-wrap: nowrap;
}

.category-btn {
    background: var(--bg-cream);
    border: 2px solid var(--black);
    padding: 6px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.1s;
}

.category-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 2px 2px 0 var(--black);
}

.category-btn.active {
    background: var(--yellow);
    box-shadow: 3px 3px 0 var(--black);
}

/* Add Task */
.add-task-section {
    padding: 16px;
    border-bottom: var(--border-width) solid var(--black);
}

.input-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.task-input {
    flex: 1;
    background: var(--bg-cream);
    border: var(--border-width) solid var(--black);
    padding: 12px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px;
    font-weight: 700;
    outline: none;
}

.task-input::placeholder {
    color: var(--black);
    opacity: 0.4;
}

.task-input:focus {
    box-shadow: 4px 4px 0 var(--black);
    transform: translate(-2px, -2px);
}

.time-input {
    width: 100px;
    background: var(--bg-cream);
    border: var(--border-width) solid var(--black);
    padding: 12px 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 700;
    outline: none;
}

.add-btn {
    width: 100%;
    background: var(--yellow);
    border: var(--border-width) solid var(--black);
    padding: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 4px 4px 0 var(--black);
    transition: all 0.05s;
}

.add-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--black);
}

.add-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0 0 0 var(--black);
}

/* Task List */
.task-list {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-card {
    background: var(--bg-cream);
    border: var(--border-width) solid var(--black);
    padding: 12px;
    padding-left: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    cursor: grab;
    box-shadow: 4px 4px 0 var(--black);
    transition: all 0.1s;
}

.task-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--black);
}

.task-card.completed {
    opacity: 0.5;
    box-shadow: 2px 2px 0 var(--black);
}

.task-card.completed .task-title {
    text-decoration: line-through;
}

.task-card.priority .priority-bar {
    background: var(--yellow);
}

.task-card.stamped {
    animation: stamp 0.3s ease-out;
}

@keyframes stamp {
    0% { transform: scale(1); }
    50% { transform: scale(0.95) rotate(-1deg); }
    100% { transform: scale(1); }
}

.priority-bar {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    background: transparent;
    transition: background 0.1s;
}

.checkbox {
    width: 28px;
    height: 28px;
    background: var(--bg-cream);
    border: var(--border-width) solid var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.1s;
}

.checkbox:hover {
    background: var(--yellow);
}

.checkbox.checked {
    background: var(--black);
    color: var(--bg-cream);
}

.task-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    min-width: 0;
}

.task-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px;
    font-weight: 700;
    word-break: break-word;
}

.edit-input {
    background: var(--yellow);
    border: 2px solid var(--black);
    padding: 4px 8px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px;
    font-weight: 700;
    outline: none;
    width: 100%;
}

.time-badge {
    display: inline-block;
    background: var(--yellow);
    border: 2px solid var(--black);
    padding: 2px 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    width: fit-content;
}

.task-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.action-btn {
    width: 28px;
    height: 28px;
    background: var(--bg-cream);
    border: 2px solid var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.1s;
}

.action-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 2px 2px 0 var(--black);
}

.priority-btn:hover {
    background: var(--yellow);
}

.delete-btn:hover {
    background: var(--coral);
}

.category-tag {
    position: absolute;
    top: -8px;
    right: 12px;
    background: var(--bg-cream);
    border: 2px solid var(--black);
    padding: 2px 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 8px;
    font-weight: 700;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    opacity: 0.5;
}

.empty-hint {
    font-size: 12px;
    margin-top: 8px;
}

/* Clear Button */
.clear-btn {
    margin: 0 16px 16px;
    background: var(--coral);
    border: var(--border-width) solid var(--black);
    padding: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 3px 3px 0 var(--black);
    transition: all 0.05s;
}

.clear-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--black);
}

.clear-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 0 0 0 var(--black);
}

/* Bottom Nav */
.bottom-nav {
    display: flex;
    border-top: var(--border-width) solid var(--black);
    background: var(--bg-cream);
}

.nav-btn {
    flex: 1;
    padding: 16px;
    background: var(--bg-cream);
    border: none;
    border-right: var(--border-width) solid var(--black);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.1s;
}

.nav-btn:last-child {
    border-right: none;
}

.nav-btn:hover {
    background: var(--yellow);
}

.nav-btn.active {
    background: var(--yellow);
}

.nav-btn.add-nav {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800;
    font-size: 24px;
}

/* Footer */
.footer {
    padding: 8px;
    border-top: 2px solid var(--black);
    text-align: center;
}

.footer a {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    opacity: 0.6;
    transition: opacity 0.1s;
}

.footer a:hover {
    opacity: 1;
}

/* Scrollbar */
.task-list::-webkit-scrollbar {
    width: 8px;
}

.task-list::-webkit-scrollbar-track {
    background: var(--bg-cream);
    border-left: 2px solid var(--black);
}

.task-list::-webkit-scrollbar-thumb {
    background: var(--black);
}

/* Mobile adjustments */
@media (max-width: 480px) {
    body {
        padding: 0;
    }
    
    .app-container {
        min-height: 100vh;
        box-shadow: none;
        border-left: none;
        border-right: none;
    }
    
    .logo {
        font-size: 36px;
    }
    
    .task-card {
        padding: 10px;
        padding-left: 14px;
    }
}