:root {
    --bg: #0f1117;
    --bg-elev: #161a23;
    --bg-card: #1b2030;
    --border: #2a3144;
    --text: #e6e9f2;
    --text-muted: #8b93a7;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-soft: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --success-soft: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;
    --danger-soft: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    --transition: 0.18s ease;
}

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

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    font-size: 15px;
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 10% 0%, rgba(99, 102, 241, 0.08), transparent 40%),
        radial-gradient(circle at 90% 100%, rgba(16, 185, 129, 0.06), transparent 40%);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ---------- Layout ---------- */

.topbar {
    background: rgba(22, 26, 35, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--text);
}

.brand i {
    color: var(--accent);
    font-size: 20px;
}

.user-block {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-muted);
    font-size: 14px;
}

.user-block i {
    color: var(--accent);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.page-title {
    font-size: 26px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.page-title i {
    color: var(--accent);
}

.breadcrumb {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb i {
    font-size: 11px;
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border);
}

.btn-ghost:hover {
    color: var(--text);
    border-color: var(--accent);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border-color: transparent;
    padding: 6px 10px;
}

.btn-danger:hover {
    background: var(--danger-soft);
}

.btn-icon {
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all var(--transition);
}

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

/* ---------- Card ---------- */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    transition: all var(--transition);
}

.card-hover:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ---------- Forms ---------- */

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 11px 14px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-error {
    color: var(--danger);
    font-size: 13px;
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ---------- Login ---------- */

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}

.login-logo i {
    font-size: 36px;
    color: var(--accent);
    background: var(--accent-soft);
    width: 72px;
    height: 72px;
    line-height: 72px;
    border-radius: 50%;
    display: inline-block;
    margin-bottom: 14px;
}

.login-logo h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 14px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ---------- Projects grid ---------- */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.project-card h3 {
    font-size: 17px;
    color: var(--text);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-card h3 i {
    color: var(--accent);
    font-size: 14px;
}

.project-desc {
    color: var(--text-muted);
    font-size: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 42px;
}

.project-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

.progress {
    height: 6px;
    background: var(--bg-elev);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    transition: width 0.4s ease;
}

/* ---------- Empty state ---------- */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 48px;
    color: var(--border);
    margin-bottom: 16px;
    display: block;
}

.empty-state p {
    font-size: 15px;
}

/* ---------- Project show ---------- */

.layout-2col {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
}

@media (max-width: 900px) {
    .layout-2col {
        grid-template-columns: 1fr;
    }
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.task-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: border-color var(--transition);
}

.task-item:hover {
    border-color: var(--accent);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-title {
    text-decoration: line-through;
}

.task-checkbox {
    flex-shrink: 0;
    margin-top: 2px;
}

.task-checkbox button {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: transparent;
    font-size: 11px;
}

.task-checkbox button:hover {
    border-color: var(--accent);
}

.task-checkbox button.checked {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
}

.task-body {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    word-wrap: break-word;
}

.task-desc {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 8px;
    word-wrap: break-word;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.task-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.task-actions {
    flex-shrink: 0;
    display: flex;
    gap: 4px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    background: var(--accent-soft);
    color: var(--accent-hover);
}

.badge-success {
    background: var(--success-soft);
    color: var(--success);
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background: var(--danger-soft);
    color: var(--danger);
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.inline-form {
    display: inline;
}

.stats {
    display: flex;
    gap: 24px;
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

.stats span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ---------- Top nav ---------- */

.topnav {
    display: flex;
    gap: 6px;
    margin-left: auto;
    margin-right: 24px;
}

.topnav a {
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

.topnav a:hover {
    color: var(--text);
    background: var(--bg-elev);
}

.topnav a.active {
    color: var(--accent-hover);
    background: var(--accent-soft);
}

/* ---------- Subtasks ---------- */

.subtasks {
    margin-top: 10px;
    padding: 10px 12px;
    background: var(--bg-elev);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.subtask-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.subtask-row:last-child {
    border-bottom: none;
}

.subtask-row.completed .subtask-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

.subtask-check {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    color: transparent;
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--transition);
}

.subtask-check:hover {
    border-color: var(--accent);
}

.subtask-check.checked {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.subtask-title {
    flex: 1;
    font-size: 13px;
    word-wrap: break-word;
    min-width: 0;
}

.subtask-progress {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.subtask-add {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.subtask-add input {
    flex: 1;
    padding: 7px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 13px;
}

.subtask-add input:focus {
    outline: none;
    border-color: var(--accent);
}

.subtask-add button {
    padding: 7px 12px;
    background: var(--accent-soft);
    color: var(--accent-hover);
    border-radius: 6px;
    font-size: 13px;
    transition: all var(--transition);
}

.subtask-add button:hover {
    background: var(--accent);
    color: #fff;
}

/* ---------- Attachments ---------- */

.attachments {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.attachment-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text);
    transition: all var(--transition);
}

.attachment-chip:hover {
    border-color: var(--accent);
}

.attachment-chip i {
    color: var(--accent);
}

.attachment-chip .size {
    color: var(--text-muted);
    font-size: 11px;
}

.attachment-chip button {
    color: var(--text-muted);
    margin-left: 4px;
    transition: color var(--transition);
}

.attachment-chip button:hover {
    color: var(--danger);
}

.upload-form {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.upload-form input[type="file"] {
    flex: 1;
    min-width: 0;
    padding: 6px;
    background: var(--bg-elev);
    border: 1px dashed var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
}

.upload-form input[type="file"]::file-selector-button {
    background: var(--accent-soft);
    color: var(--accent-hover);
    border: none;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 8px;
    font-family: inherit;
    font-size: 12px;
}

.upload-form button {
    padding: 6px 12px;
    background: var(--accent-soft);
    color: var(--accent-hover);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition);
}

.upload-form button:hover {
    background: var(--accent);
    color: #fff;
}

/* ---------- Users table ---------- */

.users-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.users-table th,
.users-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.users-table th {
    background: var(--bg-elev);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.users-table tr:last-child td {
    border-bottom: none;
}

.users-table tr:hover td {
    background: var(--bg-elev);
}

.users-table .user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-soft);
    color: var(--accent-hover);
    border-radius: 50%;
    font-weight: 600;
    margin-right: 10px;
    font-size: 13px;
}

.you-tag {
    display: inline-block;
    padding: 2px 7px;
    background: var(--success-soft);
    color: var(--success);
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 6px;
}