/* ===== Theme Variables ===== */
:root {
    --bg-body: #f8f9fa;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-navbar: #198754;
    --bg-column: #f1f3f5;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-link: #198754;
    --text-navbar: rgba(255,255,255,0.85);
    --text-navbar-active: #fff;
    --border-color: #dee2e6;
    --border-hover: #adb5bd;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.06);
    --accent: #198754;
    --accent-hover: #157347;
    --accent-subtle: rgba(25,135,84,0.1);
    --drag-over-bg: rgba(25,135,84,0.06);
    --column-todo: #6366f1;
    --column-progress: #f59e0b;
    --column-done: #10b981;
}

[data-theme="dark"] {
    --bg-body: #111111;
    --bg-card: #1a1a1a;
    --bg-input: #222222;
    --bg-navbar: #161616;
    --bg-column: #161616;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --text-link: #4ade80;
    --text-navbar: #999999;
    --text-navbar-active: #e0e0e0;
    --border-color: #2a2a2a;
    --border-hover: #444444;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --accent: #4ade80;
    --accent-hover: #22c55e;
    --accent-subtle: rgba(74,222,128,0.1);
    --drag-over-bg: rgba(74,222,128,0.06);
    --column-todo: #818cf8;
    --column-progress: #fbbf24;
    --column-done: #34d399;
}

/* ===== Base ===== */
body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    transition: background-color 0.2s, color 0.2s;
}

a {
    color: var(--text-link);
}

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

/* ===== Navbar ===== */
.site-navbar {
    background-color: var(--bg-navbar);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.site-navbar .navbar-brand {
    color: var(--text-navbar-active);
    font-weight: 700;
}

.site-navbar .navbar-brand:hover {
    color: var(--text-navbar-active);
}

.site-navbar .nav-link {
    color: var(--text-navbar);
    transition: color 0.15s;
}

.site-navbar .nav-link:hover {
    color: var(--text-navbar-active);
}

.site-navbar .navbar-toggler {
    border-color: rgba(255,255,255,0.2);
}

.site-navbar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.7%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.theme-toggle {
    background: none;
    border: none;
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: color 0.2s;
}

[data-theme="dark"] .theme-toggle {
    color: #888;
}

.theme-toggle:hover {
    color: #fff;
}

[data-theme="dark"] .theme-toggle:hover {
    color: #e0e0e0;
}

/* ===== Cards ===== */
.card {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    box-shadow: var(--card-shadow);
    color: var(--text-primary);
    transition: background-color 0.2s, border-color 0.2s;
}

.card-title {
    color: var(--text-primary);
}

/* ===== Forms ===== */
.form-control,
.form-select {
    background-color: var(--bg-input);
    border-color: var(--border-color);
    color: var(--text-primary);
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem var(--accent-subtle);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-label {
    color: var(--text-primary);
}

/* ===== Buttons ===== */
.btn-primary {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

[data-theme="dark"] .btn-primary {
    color: #111;
}

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

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background-color: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--accent);
}

.btn-outline-danger {
    border-color: var(--border-color);
}

[data-theme="dark"] .btn-outline-danger {
    color: #f87171;
    border-color: #333;
}

[data-theme="dark"] .btn-outline-danger:hover {
    background-color: rgba(248,113,113,0.1);
    border-color: #f87171;
}

/* ===== Alerts ===== */
[data-theme="dark"] .alert-success {
    background-color: rgba(74,222,128,0.1);
    border-color: rgba(74,222,128,0.2);
    color: #4ade80;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(248,113,113,0.1);
    border-color: rgba(248,113,113,0.2);
    color: #f87171;
}

[data-theme="dark"] .alert .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* ===== Modals ===== */
[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header {
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-theme="dark"] .btn-secondary {
    background-color: #333;
    border-color: #444;
    color: #ccc;
}

/* ===== Dropdowns ===== */
[data-theme="dark"] .dropdown-menu {
    background-color: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--bg-input);
}

/* ===== Text helpers ===== */
.text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

/* ===== List groups ===== */
[data-theme="dark"] .list-group-item {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* ===== Board layout ===== */
.board {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
    align-items: start;
}

.board-column {
    background: var(--bg-column);
    border-radius: 0.5rem;
    min-height: 200px;
    border: 1px solid var(--border-color);
    transition: background-color 0.2s, border-color 0.2s;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 3px solid;
    border-radius: 0.5rem 0.5rem 0 0;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.column-header.todo { border-color: var(--column-todo); color: var(--column-todo); }
.column-header.in-progress { border-color: var(--column-progress); color: var(--column-progress); }
.column-header.done { border-color: var(--column-done); color: var(--column-done); }

.column-body {
    min-height: 200px;
    padding: 0.5rem;
    transition: background 0.15s;
}

.column-body.drag-over {
    background: var(--drag-over-bg);
    border-radius: 0 0 0.5rem 0.5rem;
}

/* ===== Task cards ===== */
.task-card {
    cursor: grab;
    transition: box-shadow 0.15s, opacity 0.15s, transform 0.15s;
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
}

.task-card:hover {
    box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.1) !important;
}

[data-theme="dark"] .task-card:hover {
    box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.3) !important;
}

.task-card.dragging {
    opacity: 0.4;
    transform: rotate(2deg);
}

.task-card.done-task {
    opacity: 0.5;
}

.task-card.overdue {
    border-left: 3px solid #dc3545 !important;
}

.status-select {
    font-size: 0.75rem;
    padding: 0.15rem 0.4rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.15s;
}

.status-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.btn-delete-task {
    color: var(--text-secondary);
    transition: color 0.15s;
}

.btn-delete-task:hover {
    color: #dc3545;
}

/* ===== Badges ===== */
[data-theme="dark"] .badge.bg-light {
    background-color: #222 !important;
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .badge.border {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .badge.bg-dark {
    background-color: #333 !important;
}

/* ===== Misc ===== */
[data-theme="dark"] code {
    background-color: #222;
    color: #4ade80;
}

[data-theme="dark"] hr {
    border-color: var(--border-color);
}

[data-theme="dark"] details summary {
    color: var(--text-secondary);
}

.font-monospace {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ===== Priority badges ===== */
.badge-low {
    background-color: #6c757d;
    color: #fff;
}

.badge-medium {
    background-color: #0dcaf0;
    color: #000;
}

[data-theme="dark"] .badge-medium {
    background-color: #0aa2c0;
    color: #000;
}

.badge-high {
    background-color: #f59e0b;
    color: #000;
}

[data-theme="dark"] .badge-high {
    background-color: #d97706;
    color: #000;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .board {
        grid-template-columns: 1fr;
    }
}