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

body {
    font-family: 'Noto Sans JP', Tahoma, Geneva, Verdana, sans-serif !important;
    background: linear-gradient(135deg, #ffeaa7 0%, #fdcb6e 100%);
    min-height: 100vh;
    padding: 20px;
}

input {
    font-family: 'Noto Sans JP', Tahoma, Geneva, Verdana, sans-serif !important;
    font-size: 1em;
}

.app-container {
    display: flex;
    gap: 20px;
    max-width: 1800px;
    margin: 0 auto;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    width: 350px;
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: fit-content;
    position: sticky;
    top: 20px;
}

.sidebar-header h2 {
    color: #2d3436;
    font-size: 1.3em;
    padding-bottom: 15px;
    border-bottom: 3px solid #F7BD37;
}

.project-input-section {
    display: flex;
    gap: 8px;
}

.project-input-section input {
    flex: 1;
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #F7BD37;
    border-radius: 8px;
    font-size: 0.95em;
    outline: none;
    transition: border-color 0.3s ease;
}

.project-input-section input:focus {
    border-color: #e5ab1f;
}

.add-project-btn {
    background: #F7BD37;
    color: white;
    border: none;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.add-project-btn:hover {
    background: #e5ab1f;
    transform: translateY(-2px);
}

.projects-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 500px;
    overflow-y: auto;
}

.project-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.project-item:hover {
    background: #fffef7;
    border-color: #F7BD37;
}

.project-item.active {
    background: #fffef7;
    border-color: #F7BD37;
    font-weight: 600;
}

.project-name {
    flex: 1;
    color: #2d3436;
    word-break: break-word;
}

.project-task-count {
    background: #F7BD37;
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
    margin-left: 8px;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    background: white;
    padding: 25px 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    color: #2d3436;
    font-size: 2em;
}

.controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.control-btn {
    background: #F7BD37;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(247, 189, 55, 0.3);
    white-space: nowrap;
}

.control-btn:hover {
    background: #e5ab1f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(247, 189, 55, 0.4);
}

.control-btn.delete {
    background: #d63031;
    box-shadow: 0 2px 8px rgba(214, 48, 49, 0.3);
}

.control-btn.delete:hover {
    background: #c0281f;
    box-shadow: 0 4px 12px rgba(214, 48, 49, 0.4);
}

.add-task-section {
    background: white;
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 15px;
}

#taskInput {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid #F7BD37;
    border-radius: 8px;
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease;
}

#taskInput:focus {
    border-color: #e5ab1f;
}

#addTaskBtn {
    background: #F7BD37;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
}

#addTaskBtn:hover {
    background: #e5ab1f;
    transform: translateY(-2px);
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.column {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    min-height: 500px;
}

.column h2 {
    color: #2d3436;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid #F7BD37;
    font-size: 1.3em;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-card {
    background: #fffef7;
    border: 2px solid #F7BD37;
    border-radius: 10px;
    padding: 15px;
    transition: all 0.3s ease;
}

.task-card:hover {
    box-shadow: 0 4px 12px rgba(247, 189, 55, 0.3);
    transform: translateY(-2px);
}

.task-content {
    color: #2d3436;
    font-size: 1em;
    margin-bottom: 12px;
    word-wrap: break-word;
}

.task-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.task-btn {
    background: #F7BD37;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    transition: all 0.2s ease;
}

.task-btn:hover {
    background: #e5ab1f;
    transform: scale(1.05);
}

.task-btn.delete {
    background: #d63031;
}

.task-btn.delete:hover {
    background: #c0281f;
}

.task-btn:disabled {
    background: #dfe6e9;
    cursor: not-allowed;
    transform: none;
}

@media (max-width: 1200px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: static;
    }

    .board {
        grid-template-columns: 1fr;
    }

    header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .controls {
        width: 100%;
    }
}