:root {
    --primary-color: #0b162a;
    --accent-color: #1b4bc6;
    --bg-color: #efdbbf;
    --bg-light: #f1eae0;
    --text-color: #242a2b;
    --danger-color: #d32f2f;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: 
        linear-gradient(rgba(27, 75, 198, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(27, 75, 198, 0.06) 1px, transparent 1px);
    background-size: 27px 27px;
    background-position: center center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: linear-gradient(
        to bottom,
        var(--bg-color) 40%,
        rgba(239, 219, 191, 0.5) 80%,
        rgba(239, 219, 191, 0)
    );
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    height: 5vh;
    flex: 0 0 5vh;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-brand a {
    text-decoration: none;
    transition: color 0.3s ease;
    color: var(--primary-color);
}

.nav-brand a:hover {
    color: var(--accent-color);
}

.nav-help-btn {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.4rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
    border-radius: 4px;
}

.nav-help-btn:hover {
    background-color: var(--accent-color);
    color: var(--bg-light);
}

.site-main {
    flex: 0 0 92vh;
    display: flex;
}

.kanban-container {
    margin: 0 4rem;
    min-height: 40vh;
    display: flex;
    gap: 2rem;
    padding: 1rem 0 2rem;
    flex: 1;
}

.kanban-column {
    flex: 1 1 0;
    min-width: 0;
    max-width: none;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.kanban-column-title {
    font-weight: 700;
    font-size: 1.35rem;
    text-align: center;
    position: relative;
    padding: 0 1.8rem;
}

.kanban-column-delete {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1.6rem;
    height: 1.6rem;
    border: none;
    background: transparent;
    color: rgba(36, 42, 43, 0.55);
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
    padding: 0;
    opacity: 0;
    cursor: pointer;
    transition: opacity 0.2s ease, color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kanban-column-title:hover .kanban-column-delete {
    opacity: 1;
}

.kanban-column-delete:hover {
    color: var(--danger-color);
}

.kanban-column.kanban-column-add {
    flex: 0 0 10%;
    max-width: 10%;
    justify-content: flex-start;
}

.kanban-item {
    background-color: var(--bg-light);
    border: 2px solid var(--accent-color);
    padding: 0.75rem 1rem;
    box-shadow: 4px 4px 0 var(--accent-color);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.kanban-item-title {
    font-weight: 700;
}

.kanban-item-notes {
    margin: 0;
    font-size: 0.95rem;
}

.kanban-item-add {
    width: 100%;
    border: 2px dashed var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    font-weight: 700;
    font-size: 1.2rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.kanban-column-add .kanban-column-title {
    width: 100%;
    border: none;
    background: transparent;
    color: rgba(36, 42, 43, 0.6);
    font-weight: 700;
    font-size: 1.35rem;
    padding: 0.35rem 0.5rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

.kanban-column-add .kanban-column-title[contenteditable="true"]:empty::before {
    content: "add column";
    color: rgba(36, 42, 43, 0.4);
    pointer-events: none;
}

.kanban-item-add:hover {
    background-color: rgba(27, 75, 198, 0.08);
}

.kanban-column-add .kanban-column-title:hover {
    color: var(--accent-color);
}

.site-footer {
    padding: 1rem 4rem 2rem;
    color: var(--text-color);
    font-size: 0.95rem;
    height: 3vh;
    flex: 0 0 3vh;
    display: flex;
    align-items: center;
}

.footer-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.help-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(239, 219, 191, 0.5);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.help-overlay.active {
    display: flex;
}

.help-modal {
    background-color: var(--bg-light);
    border: 2px solid var(--accent-color);
    box-shadow: 8px 8px 0 var(--accent-color);
    width: 90%;
    height: 90%;
    max-width: 800px;
    max-height: 90vh;
    padding: 2rem;
    position: relative;
    overflow-y: auto;
}

.help-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--text-color);
    cursor: pointer;
    line-height: 1;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.help-close:hover {
    color: var(--danger-color);
}

.help-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.help-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.help-content section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.help-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.help-content p {
    line-height: 1.6;
    color: var(--text-color);
}

.help-content a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

.help-content a:hover {
    text-decoration: underline;
}

.help-content kbd {
    background-color: var(--bg-color);
    border: 1px solid var(--accent-color);
    border-radius: 3px;
    padding: 0.1rem 0.4rem;
    font-family: monospace;
    font-size: 0.9em;
}