/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --accent-soft: #eef2ff;
    --accent-soft-text: #4338ca;

    --bg: #f6f7f9;
    --surface: #ffffff;
    --border: #e5e7eb;
    --border-soft: #eef0f2;

    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #8b93a1;

    --success: #16a34a;
    --success-soft: #e9f9ef;
    --success-soft-text: #15803d;
    --danger: #dc2626;
    --danger-soft: #fdecec;
    --danger-soft-text: #b91c1c;
    --warning: #d97706;
    --warning-soft: #fef4e6;
    --warning-soft-text: #b45309;
    --info: #0891b2;
    --info-soft: #e6f7fb;
    --info-soft-text: #0e7490;
    --secondary-soft: #f0f1f3;
    --secondary-soft-text: #4b5563;

    --sidebar-bg: #12172b;
    --sidebar-bg-active: #1c2340;
    --sidebar-text: #aab1c5;
    --sidebar-text-active: #ffffff;
    --sidebar-border: #262c47;
    --sidebar-width: 264px;
    --sidebar-width-collapsed: 76px;
    --topbar-height: 64px;

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;

    --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);
    --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04);
    --shadow-lg: 0 10px 30px rgba(16, 24, 40, .12);
}

/* ==========================================================================
   Base
   ========================================================================== */
body {
    background: var(--bg);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: .925rem;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

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

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

.text-muted {
    color: var(--text-muted) !important;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #d3d7de;
    border-radius: 10px;
    border: 2px solid var(--bg);
}

/* ==========================================================================
   App shell: sidebar + topbar + content
   ========================================================================== */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    z-index: 1040;
    transition: width .18s ease, transform .22s ease;
}

.app-sidebar-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: 1.15rem 1.25rem;
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    white-space: nowrap;
    overflow: hidden;
    border-bottom: 1px solid var(--sidebar-border);
    min-height: var(--topbar-height);
}

.app-sidebar-brand img {
    height: 28px;
    width: 28px;
    object-fit: contain;
    border-radius: 6px;
    flex-shrink: 0;
}

.app-sidebar-brand .brand-icon-fallback {
    height: 28px;
    width: 28px;
    border-radius: 6px;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: .85rem;
}

.app-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: .9rem .75rem;
}

.app-sidebar-section {
    color: #6b7280;
    text-transform: uppercase;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .06em;
    padding: 1rem .6rem .35rem;
    white-space: nowrap;
    overflow: hidden;
}

.app-sidebar-section:first-child {
    padding-top: .25rem;
}

.app-sidebar .nav-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    color: var(--sidebar-text);
    font-size: .875rem;
    font-weight: 500;
    padding: .55rem .65rem;
    border-radius: var(--radius-sm);
    margin-bottom: .15rem;
    white-space: nowrap;
    overflow: hidden;
}

.app-sidebar .nav-link i {
    width: 18px;
    text-align: center;
    font-size: .95rem;
    flex-shrink: 0;
}

.app-sidebar .nav-link:hover {
    background: var(--sidebar-bg-active);
    color: #fff;
}

.app-sidebar .nav-link.active {
    background: var(--accent);
    color: #fff;
}

.app-sidebar-footer {
    padding: .75rem;
    border-top: 1px solid var(--sidebar-border);
}

.sidebar-collapse-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    background: transparent;
    border: 1px solid var(--sidebar-border);
    color: var(--sidebar-text);
    border-radius: var(--radius-sm);
    padding: .5rem;
    font-size: .8rem;
}

.sidebar-collapse-btn:hover {
    background: var(--sidebar-bg-active);
    color: #fff;
}

.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left .18s ease;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    height: var(--topbar-height);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    gap: 1rem;
}

.sidebar-toggle-mobile,
.sidebar-toggle-desktop {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle-mobile:hover,
.sidebar-toggle-desktop:hover {
    background: var(--bg);
    color: var(--text-primary);
}

.sidebar-toggle-mobile {
    display: none;
}

.app-topbar .topbar-actions {
    display: flex;
    align-items: center;
    gap: .35rem;
}

.app-topbar .nav-link {
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    padding: .45rem .55rem;
    position: relative;
}

.app-topbar .nav-link:hover {
    background: var(--bg);
    color: var(--text-primary);
}

.user-chip {
    display: flex;
    align-items: center;
    gap: .55rem;
    padding: .3rem .6rem .3rem .3rem !important;
}

.user-chip .avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent-soft-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .8rem;
    flex-shrink: 0;
}

.app-content {
    padding: 1.75rem;
    flex: 1;
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 18, 30, .45);
    z-index: 1035;
}

/* Collapsed (desktop rail) state */
body.sidebar-collapsed .app-sidebar {
    width: var(--sidebar-width-collapsed);
}

body.sidebar-collapsed .app-main {
    margin-left: var(--sidebar-width-collapsed);
}

body.sidebar-collapsed .app-sidebar-brand span,
body.sidebar-collapsed .app-sidebar-section,
body.sidebar-collapsed .app-sidebar .nav-link span,
body.sidebar-collapsed .sidebar-collapse-btn span {
    display: none;
}

body.sidebar-collapsed .app-sidebar .nav-link {
    justify-content: center;
}

/* Logged-out (no shell) pages */
body.no-shell {
    background: linear-gradient(180deg, #f6f7f9 0%, #eef0f4 100%);
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

/* ==========================================================================
   Bootstrap component overrides
   ========================================================================== */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: .875rem;
    padding: .5rem 1rem;
}

.btn-sm {
    border-radius: var(--radius-sm);
    font-size: .8rem;
}

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

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

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

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

.btn:focus,
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 .2rem rgba(79, 70, 229, .15);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-soft);
    font-weight: 600;
    padding: .9rem 1.1rem;
}

.card-body {
    padding: 1.1rem;
}

.card-title {
    font-weight: 600;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.table {
    color: var(--text-primary);
    font-size: .875rem;
}

.table thead th {
    text-transform: uppercase;
    font-size: .7rem;
    letter-spacing: .04em;
    font-weight: 700;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.table > :not(caption) > * > * {
    border-bottom-color: var(--border-soft);
    padding-top: .7rem;
    padding-bottom: .7rem;
}

.table-hover > tbody > tr:hover > * {
    background-color: var(--bg);
}

.form-control,
.form-select {
    border-radius: var(--radius-sm);
    border-color: var(--border);
    font-size: .875rem;
    padding: .5rem .75rem;
}

.toggle-password {
    border-color: var(--border);
    color: var(--text-muted);
    background: var(--surface);
}

.toggle-password:hover {
    color: var(--text-primary);
    background: var(--bg);
}

.toggle-password:focus {
    box-shadow: none;
    z-index: 0;
}

.form-label {
    font-weight: 600;
    font-size: .82rem;
    color: var(--text-secondary);
    margin-bottom: .35rem;
}

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

.badge {
    font-weight: 600;
    font-size: .72rem;
    padding: .4em .65em;
    border-radius: 999px;
}

.badge.bg-success, .text-bg-success { background-color: var(--success-soft) !important; color: var(--success-soft-text) !important; }
.badge.bg-danger, .text-bg-danger { background-color: var(--danger-soft) !important; color: var(--danger-soft-text) !important; }
.badge.bg-warning, .text-bg-warning { background-color: var(--warning-soft) !important; color: var(--warning-soft-text) !important; }
.badge.bg-info, .text-bg-info { background-color: var(--info-soft) !important; color: var(--info-soft-text) !important; }
.badge.bg-secondary, .text-bg-secondary { background-color: var(--secondary-soft) !important; color: var(--secondary-soft-text) !important; }
.badge.bg-primary, .text-bg-primary { background-color: var(--accent-soft) !important; color: var(--accent-soft-text) !important; }

.badge-priority-high { background: var(--danger-soft) !important; color: var(--danger-soft-text) !important; }
.badge-priority-medium { background: var(--warning-soft) !important; color: var(--warning-soft-text) !important; }
.badge-priority-low { background: var(--secondary-soft) !important; color: var(--secondary-soft-text) !important; }

.alert {
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: .875rem;
}

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

.dropdown-menu {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: .4rem;
}

.dropdown-menu.dropdown-menu-dark {
    --bs-dropdown-bg: var(--sidebar-bg);
    --bs-dropdown-link-color: var(--sidebar-text);
    --bs-dropdown-link-hover-color: #fff;
    --bs-dropdown-link-hover-bg: var(--sidebar-bg-active);
    border-color: var(--sidebar-border);
}

.dropdown-item {
    border-radius: var(--radius-sm);
    font-size: .875rem;
    padding: .5rem .65rem;
}

.list-group-item {
    border-color: var(--border-soft);
}

.nav-tabs {
    border-bottom: 1px solid var(--border);
}

.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: .875rem;
    border-bottom: 2px solid transparent;
    border-radius: 0;
}

.nav-tabs .nav-link.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: transparent;
}

.kanban-col {
    background: var(--bg);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
}

.kanban-card {
    border-radius: var(--radius-sm) !important;
}

.timer-running {
    color: var(--success);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 991.98px) {
    .app-sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }

    body.sidebar-open .app-sidebar {
        transform: translateX(0);
    }

    body.sidebar-open .sidebar-backdrop {
        display: block;
    }

    .app-main,
    body.sidebar-collapsed .app-main {
        margin-left: 0;
    }

    .sidebar-toggle-mobile {
        display: inline-flex;
    }

    .sidebar-toggle-desktop {
        display: none;
    }

    .app-content {
        padding: 1.1rem;
    }
}