:root {
    /* Architect-inspired Palette */
    --ink: #0f172a;
    --slate: #1f2937;
    --primary-color: #0f766e; /* deep teal */
    --primary-hover: #0d9488;
    --primary-light: #e0f2f1;
    --accent-color: #d6a75b; /* brass / sand accent */
    --secondary-color: #6b7280;
    --success-color: #0f9f4f;
    --danger-color: #e11d48;
    --info-color: #2563eb;

    /* Backgrounds */
    --bg-body: #f6f7f8;
    --bg-surface: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);

    /* Text */
    --text-main: #0f172a;
    --text-muted: #4b5563;
    --text-light: #9ca3af;

    /* Borders & Shadows */
    --border-color: rgba(15, 23, 42, 0.08);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 14px 32px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 0 24px rgba(13, 148, 136, 0.15);

    /* Spacing & Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Fonts */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Space Grotesk', 'Inter', system-ui, sans-serif;

    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-sans);
    background-color: #f4f5f7;
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

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

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

/* Glassmorphism Utilities */
.glass {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.glass-hover:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-main) !important;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-logo {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 600;
    padding: 0.6rem 1rem !important;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color) !important;
    background: rgba(13, 148, 136, 0.1);
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(13, 148, 136, 0.3);
    transform: translateY(-2px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-body {
    padding: 1.5rem;
}

/* Stats Cards */
.stat-card {
    position: relative;
    overflow: hidden;
}

.badge-status {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: 0.01em;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.badge-won {
    background: rgba(15, 159, 103, 0.14);
    color: #0b4f37;
    border: 1px solid rgba(15, 159, 103, 0.45);
}

.badge-lost {
    background: rgba(225, 29, 72, 0.14);
    color: #7a102c;
    border: 1px solid rgba(225, 29, 72, 0.45);
}

.badge-discussion {
    background: rgba(214, 167, 91, 0.2);
    color: #8a5a16;
    border: 1px solid rgba(214, 167, 91, 0.5);
}

.badge-new {
    background: rgba(59, 130, 246, 0.14);
    color: #1e3a8a;
    border: 1px solid rgba(59, 130, 246, 0.45);
}

.btn-convert {
    background: linear-gradient(135deg, #0f766e, #0ea371);
    color: #fff;
    border: none;
    box-shadow: 0 8px 18px rgba(14, 163, 113, 0.25);
}

.btn-convert:hover {
    background: linear-gradient(135deg, #0d5f59, #0c9a64);
    color: #fff;
}

.btn-converted,
.btn-locked {
    background: #f4f4f5;
    color: #6b7280;
    border: 1px solid #e5e7eb;
    cursor: not-allowed;
    box-shadow: none;
}

/* Global button tweaks */
.btn-primary {
    background: linear-gradient(135deg, #0f766e, #0d9488);
    border: none;
    box-shadow: 0 10px 20px rgba(13, 148, 136, 0.18);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0d5f59, #0b8a7c);
}

.btn-outline-secondary {
    border-color: #cbd5e1;
    color: #334155;
}

.btn-outline-secondary:hover {
    background: #f1f5f9;
    color: #111827;
}

thead th {
    color: #334155;
    font-weight: 700;
    letter-spacing: 0.01em;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

table.table tr:hover {
    background: rgba(8, 145, 178, 0.04);
}

table td {
    vertical-align: middle;
}

.page-shell {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    max-width: 1280px;
    width: 100%;
    margin: 1.25rem auto 0 auto;
}
.page-shell > * + * {
    margin-top: 1rem;
}

.section-title {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.9rem;
    color: var(--text-muted);
}

input.form-control,
select.form-select,
textarea.form-control {
    border-radius: var(--radius-md);
    border: 1px solid #e2e8f0;
    padding: 0.65rem 0.8rem;
    transition: var(--transition-fast);
}

input.form-control:focus,
select.form-select:focus,
textarea.form-control:focus {
    border-color: rgba(13, 148, 136, 0.5);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.table > :not(caption) > * > * {
    padding: 0.9rem 0.75rem;
}

.table-responsive {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.page-header .actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.page-header-sticky {
    position: sticky;
    top: 72px;
    z-index: 8;
    padding: 0.35rem 0;
    background: #f4f5f7;
}

.filter-toggle {
    display: none;
}

.filter-collapse {
    transition: height 0.2s ease;
}

.table-stack {
    border: none;
}

@media (max-width: 768px) {
    .table-stack thead {
        display: none;
    }
    .table-stack tbody {
        display: grid;
        gap: 0.75rem;
    }
    .table-stack tr {
        display: grid;
        gap: 0.35rem;
        padding: 0.85rem 0.9rem;
        background: var(--bg-surface);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
    }
    .table-stack td {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 0.75rem;
        padding: 0.15rem 0;
        border: 0;
    }
    .table-stack td::before {
        content: attr(data-label);
        font-size: 0.78rem;
        color: var(--text-muted);
        font-weight: 700;
        letter-spacing: 0.02em;
    }
    .table-stack td.text-end {
        justify-content: flex-end;
    }
    .stack-inline {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    .filter-toggle {
        display: block;
    }
    .page-header-sticky {
        top: 64px;
    }
}

.layout-duo {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.table th,
.table td {
    vertical-align: middle;
}

.table-striped tbody tr:nth-child(odd) {
    background-color: #f8fafc;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #fff;
    margin-bottom: 0.75rem;
}

.toolbar .actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.kanban-board {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    scroll-snap-type: x proximity;
}

.kanban-column {
    min-width: 260px;
    flex: 0 0 280px;
    scroll-snap-align: start;
}

.kanban-col {
    border: 1px solid #e2e8f0;
    border-radius: 14px;
}

.kanban-todo .card-header { color: #0f172a; }
.kanban-todo .card-body { background: #f8fafc; }
.kanban-in_progress .card-header { color: #92400e; }
.kanban-in_progress .card-body { background: #fff7ed; }
.kanban-done .card-header { color: #0f5132; }
.kanban-done .card-body { background: #f0fdf4; }

.kanban-task {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 0.75rem;
    background: #fff;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.panel-subtle {
    background: transparent;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    box-shadow: none;
}

.panel-subtle .card-body {
    padding: 1rem 1.25rem;
}

@media (max-width: 992px) {
    .page-shell {
        padding: 1rem;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .page-header .actions {
        width: 100%;
        justify-content: flex-start;
    }
    .navbar .dropdown-menu {
        border-radius: var(--radius-md);
    }
    .navbar .nav-link {
        padding: 0.5rem 0.75rem !important;
    }
    .layout-duo {
        grid-template-columns: 1fr;
    }
    .navbar .nav-link {
        padding: 0.5rem 0.75rem !important;
    }
    .table-responsive {
        border-radius: var(--radius-md);
    }
    .table > :not(caption) > * > * {
        padding: 0.75rem 0.65rem;
    }
}

@media (max-width: 640px) {
    body {
        background-size: auto;
    }
    .page-shell {
        border: none;
        box-shadow: none;
        padding: 0.75rem;
    }
    .navbar {
        padding: 0.5rem 0;
    }
    h1, h2, h3 {
        margin-bottom: 0.5rem;
    }
    .btn {
        font-size: 0.95rem;
    }
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), transparent);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, var(--text-main), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

/* Lists & Tables */
.list-group-item {
    background: transparent;
    border-color: var(--border-color);
    padding: 1rem 1.5rem;
    transition: var(--transition-fast);
}

.list-group-item:hover {
    background: var(--primary-light);
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: rgba(248, 250, 252, 0.5);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 1.5rem;
}

.table tbody td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    font-weight: 500;
}

.table-hover tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.6);
}

/* Buttons */
.btn {
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: var(--transition-normal);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(8, 145, 178, 0.4);
    background: linear-gradient(135deg, var(--primary-hover), #0e7490);
}

.btn-outline-secondary {
    background: white;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline-secondary:hover {
    background: var(--bg-body);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

/* Forms */
.form-control,
.form-select {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(8, 145, 178, 0.1);
    background: white;
}

.form-actions-sticky {
    position: sticky;
    bottom: 0;
    padding: 0.75rem 0;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(8px);
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}

/* Badges */
.badge {
    padding: 0.5em 0.8em;
    font-weight: 600;
    border-radius: 2rem;
    letter-spacing: 0.02em;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-warning {
    background-color: var(--accent-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

/* Utilities */
.text-primary {
    color: var(--primary-color) !important;
}

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

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

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

.shadow-glow {
    box-shadow: var(--shadow-glow);
}

.page-shell {
    max-width: 1280px;
    padding: 0 1.5rem 4rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Auth Pages */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, rgba(8, 145, 178, 0.1), transparent 40%),
        radial-gradient(circle at bottom left, rgba(245, 158, 11, 0.1), transparent 40%),
        var(--bg-body);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 2rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.auth-logo {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    background: white;
    padding: 12px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}