:root {
    /* Фоны */
    --bg-page: #FAF8F5;
    --bg-card: #FFFFFF;
    --bg-hover: #F5F2EF;

    /* Текст */
    --text-primary: #2C2418;
    --text-secondary: #8C8176;
    --text-placeholder: #B8AFA6;

    /* Акцент — только для действий */
    --accent: #C2714F;
    --accent-hover: #A85D3F;

    /* Утилитарные */
    --border: #E8E2DC;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    --shadow-card-hover: 0 2px 6px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.05);

    /* Размеры */
    --space-xs: 0.25rem;
    --space-s: 0.5rem;
    --space-m: 1rem;
    --space-l: 1.5rem;
    --space-xl: 2rem;

    /* Скругления */
    --radius-s: 8px;
    --radius-m: 12px;
    --radius-l: 16px;

    /* Шрифты */
    --font-main: -apple-system, 'Segoe UI', system-ui, Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

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

body {
    font-family: var(--font-main);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Navbar --- */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-s) var(--space-xl);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-right {
    display: flex;
    gap: var(--space-m);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-logout {
    color: var(--accent);
}

/* --- Main --- */
main {
    flex: 1;
    padding: var(--space-xl);
}

/* --- Footer --- */
.footer {
    padding: var(--space-s) var(--space-xl);
    text-align: center;
    color: var(--text-placeholder);
    font-size: 12px;
    border-top: 1px solid var(--border);
}

/* --- Login --- */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-page);
}

.login-container {
    background: var(--bg-card);
    padding: var(--space-xl);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-card);
    width: 100%;
    max-width: 360px;
}

.login-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-l);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
}

.login-footer {
    text-align: center;
    margin-top: var(--space-l);
    color: var(--text-placeholder);
    font-size: 12px;
}

/* --- Forms --- */
input, textarea, select {
    font-family: var(--font-main);
    font-size: 14px;
    padding: var(--space-s) var(--space-m);
    border: 1px solid var(--border);
    border-radius: var(--radius-s);
    background: var(--bg-card);
    color: var(--text-primary);
    outline: none;
    width: 100%;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--accent);
}

input::placeholder, textarea::placeholder {
    color: var(--text-placeholder);
}

.inline-form {
    display: flex;
    gap: var(--space-s);
    align-items: center;
}

.inline-form input {
    width: auto;
    flex: 1;
}

.form-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--space-s);
}

.form-vertical label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-top: var(--space-s);
}

.form-actions {
    display: flex;
    gap: var(--space-s);
    margin-top: var(--space-m);
}

/* --- Buttons --- */
.btn {
    font-family: var(--font-main);
    font-size: 14px;
    padding: var(--space-s) var(--space-m);
    border: none;
    border-radius: var(--radius-s);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-danger {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-danger:hover {
    background: var(--accent);
    color: #fff;
}

.btn-sm {
    font-size: 12px;
    padding: var(--space-xs) var(--space-s);
}

.btn-xs {
    font-size: 11px;
    padding: 2px 6px;
}

.btn-icon {
    background: transparent;
    color: var(--text-placeholder);
    border: none;
    cursor: pointer;
    font-size: 14px;
    padding: 2px 4px;
    border-radius: 4px;
    line-height: 1;
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

/* --- Error --- */
.error-message {
    background: #FEF2F2;
    color: #991B1B;
    padding: var(--space-s) var(--space-m);
    border-radius: var(--radius-s);
    font-size: 13px;
    margin-bottom: var(--space-m);
}

/* --- Page header --- */
.page-header {
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    font-size: 24px;
    font-weight: 700;
}

/* --- Projects grid --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-m);
    margin-bottom: var(--space-xl);
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-card);
    padding: var(--space-l);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: box-shadow 0.15s ease;
}

.project-card:hover {
    box-shadow: var(--shadow-card-hover);
}

.project-link {
    text-decoration: none;
    color: inherit;
}

.project-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.project-slug {
    font-size: 12px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* --- Create form section --- */
.create-form-section {
    background: var(--bg-card);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-card);
    padding: var(--space-l);
    max-width: 500px;
}

.create-form-section h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--space-m);
}

/* --- Users --- */
.users-list {
    margin-bottom: var(--space-xl);
}

.user-item {
    display: flex;
    gap: var(--space-m);
    padding: var(--space-s) 0;
    border-bottom: 1px solid var(--border);
}

.user-username {
    font-weight: 600;
}

.user-email {
    color: var(--text-secondary);
}

/* --- Board --- */
.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-m);
}

.board-header h1 {
    font-size: 24px;
    font-weight: 700;
}

.board {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(260px, 1fr);
    gap: var(--space-m);
    overflow-x: auto;
    padding-bottom: var(--space-m);
    min-height: calc(100vh - 200px);
    align-items: start;
}

.column {
    background: var(--bg-card);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-card);
    padding: var(--space-m);
    display: flex;
    flex-direction: column;
    min-height: 200px;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-m);
    cursor: grab;
    padding-bottom: var(--space-s);
    border-bottom: 1px solid var(--border);
}

.column-title {
    font-size: 14px;
    font-weight: 600;
}

.task-count {
    font-size: 12px;
    color: var(--text-placeholder);
    font-weight: 400;
    margin-left: var(--space-xs);
}

.task-list {
    flex: 1;
    min-height: 40px;
}

/* --- Task card --- */
.task-card {
    background: var(--bg-page);
    border-radius: var(--radius-m);
    padding: var(--space-m);
    margin-bottom: var(--space-s);
    cursor: grab;
    transition: box-shadow 0.15s ease;
}

.task-card:hover {
    box-shadow: var(--shadow-card-hover);
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.task-title {
    font-weight: 500;
    font-size: 14px;
    flex: 1;
}

.task-actions {
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.task-card:hover .task-actions {
    opacity: 1;
}

.task-description {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: var(--space-xs);
    line-height: 1.4;
}

.task-assignee {
    display: inline-block;
    font-size: 11px;
    color: var(--accent);
    background: rgba(194, 113, 79, 0.1);
    padding: 2px 8px;
    border-radius: 10px;
    margin-top: var(--space-s);
}

/* --- Add task form --- */
.add-task-form {
    margin-top: var(--space-s);
}

.add-task-input {
    font-size: 13px;
    padding: var(--space-s);
    border: 1px dashed var(--border);
    background: transparent;
}

.add-task-input:focus {
    border-style: solid;
    border-color: var(--accent);
    background: var(--bg-card);
}

/* --- Empty states --- */
.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-placeholder);
}

.empty-column {
    text-align: center;
    padding: var(--space-l);
    color: var(--text-placeholder);
    font-size: 13px;
}

/* --- Drag-and-drop --- */
.task-ghost {
    opacity: 0.4;
}

.task-drag {
    box-shadow: var(--shadow-card-hover);
}

.column-ghost {
    opacity: 0.4;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-card-hover);
    padding: var(--space-xl);
    width: 100%;
    max-width: 460px;
}

.modal-content h2 {
    font-size: 18px;
    margin-bottom: var(--space-m);
}

/* --- Modal container (always present in DOM) --- */
#modal-container {
    position: fixed;
    z-index: 200;
}

/* --- Adaptive --- */
@media (max-width: 768px) {
    main {
        padding: var(--space-m);
    }

    .board {
        grid-auto-columns: 85vw;
    }

    .navbar {
        padding: var(--space-s) var(--space-m);
    }

    .board-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-s);
    }
}