:root {
    --bg-color: #f8f9fa;
    --font-color: #202124;
    --border-color: #dadce0;
    --card-bg: #ffffff;
    --shadow-color: rgba(0,0,0,0.1);
    --primary-color: #1a73e8;
    --header-height: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--font-color);
    line-height: 1.5;
}

header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

header h1 {
    font-size: 22px;
    font-weight: 500;
}

main {
    padding: 24px;
}

#board-container {
    display: flex;
    align-items: flex-start;
    overflow-x: auto;
    padding-bottom: 16px;
}

#board {
    display: flex;
    gap: 16px;
}

.column {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 300px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.column-header {
    padding: 12px;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.column-title {
    flex-grow: 1;
}

.column-title:focus {
    outline: none;
    background: #eee;
    padding: 2px 4px;
    border-radius: 4px;
}

.delete-column-btn {
    cursor: pointer;
    background: none;
    border: none;
    font-size: 18px;
    color: #5f6368;
    padding: 0 4px;
}
.delete-column-btn:hover {
    color: var(--font-color);
}

.delete-entry-btn {
    position: absolute;
    top: 2px;
    right: 2px;
    z-index: 1;
    background: none;
    border: none;
    font-size: 22px;
    line-height: 1;
    color: #aaa;
    cursor: pointer;
    padding: 2px 4px;
    display: none;
}
.entry:hover .delete-entry-btn {
    display: block;
}
.delete-entry-btn:hover {
    color: #333;
}

.entries {
    padding: 8px;
    flex-grow: 1;
    min-height: 100px;
}

.entry {
    background-color: var(--card-bg);
    border-radius: 4px;
    padding: 12px;
    margin-bottom: 8px;
    box-shadow: 0 1px 2px var(--shadow-color);
    cursor: grab;
    height: 120px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.entry-content-wrapper {
    overflow: hidden;
    flex-grow: 1;
}

.entry.dragging {
    opacity: 0.5;
}

.entry h4 {
    margin: 0 0 4px 0;
    font-size: 16px;
}

.entry p {
    margin: 0;
    font-size: 14px;
    color: #5f6368;
}

.view-more {
    font-size: 12px;
    color: var(--primary-color);
    cursor: pointer;
    margin-top: auto;
    padding-top: 4px;
    text-align: right;
    background: linear-gradient(to top, white, rgba(255,255,255,0.8) 20%, transparent);
}

.add-entry-btn, .add-column-btn {
    width: calc(100% - 16px);
    margin: 8px;
    padding: 8px;
    border: 1px dashed var(--border-color);
    background: none;
    border-radius: 4px;
    cursor: pointer;
    color: #5f6368;
    text-align: center;
}
.add-entry-btn:hover, .add-column-btn:hover {
    background-color: #f1f3f4;
}
.add-column-btn {
    width: 300px;
    flex-shrink: 0;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 80%;
    max-width: 600px;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-content h2 {
    margin: 0;
    font-weight: 500;
}

.modal-content input, .modal-content textarea, .modal-content select, .modal-content button {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-size: 14px;
}
.modal-content textarea {
    min-height: 100px;
    resize: vertical;
}
#entry-content-input {
    min-height: 200px;
}

.modal-content button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
}
.modal-content button:hover {
    opacity: 0.9;
}

.close-btn {
    color: #aaa;
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

#view-entry-content {
    background: var(--bg-color);
    padding: 16px;
    border-radius: 4px;
    max-height: 400px;
    overflow-y: auto;
}
#view-entry-content h1, #view-entry-content h2, #view-entry-content p {
    margin: 0 0 1em 0;
}