/*
 * Bootstrap Material Flat Theme
 * A flat, Material Design-inspired override for Bootstrap 5
 */

/* ── Palette ─────────────────────────────────────────── */
:root {
    --md-primary:       #1976D2;
    --md-primary-dark:  #1565C0;
    --md-primary-light: #BBDEFB;
    --md-accent:        #00BCD4;
    --md-success:       #43A047;
    --md-success-dark:  #388E3C;
    --md-danger:        #E53935;
    --md-danger-dark:   #C62828;
    --md-warning:       #FB8C00;
    --md-warning-dark:  #EF6C00;
    --md-info:          #039BE5;
    --md-info-dark:     #0277BD;
    --md-secondary:     #78909C;
    --md-secondary-dark:#546E7A;
    --md-dark:          #263238;
    --md-darker:        #1a2327;
    --md-body-bg:       #ECEFF1;
    --md-surface:       #FFFFFF;
    --md-text:          #212121;
    --md-text-secondary:#757575;
    --md-divider:       #B0BEC5;
    --md-radius:        2px;
    --md-shadow-1:      0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.14);
    --md-shadow-2:      0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --md-shadow-3:      0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
    --md-transition:    0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Base ────────────────────────────────────────────── */
body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--md-body-bg);
    color: var(--md-text);
    -webkit-font-smoothing: antialiased;
}

/* ── Typography ──────────────────────────────────────── */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-weight: 500;
    color: var(--md-text);
}

small, .small, .text-muted {
    color: var(--md-text-secondary) !important;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    border-radius: var(--md-radius);
    text-transform: uppercase;
    font-weight: 500;
    font-size: 0.8125rem;
    letter-spacing: 0.03em;
    border: none;
    box-shadow: var(--md-shadow-1);
    transition: background var(--md-transition), box-shadow var(--md-transition);
    padding: 0.5rem 1rem;
}
.btn:hover {
    box-shadow: var(--md-shadow-2);
}
.btn:active, .btn:focus {
    box-shadow: var(--md-shadow-1);
}

.btn-primary    { background: var(--md-primary);   color: #fff; }
.btn-primary:hover { background: var(--md-primary-dark); color: #fff; }

.btn-success    { background: var(--md-success);   color: #fff; }
.btn-success:hover { background: var(--md-success-dark); color: #fff; }

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

.btn-warning    { background: var(--md-warning);   color: #fff; }
.btn-warning:hover { background: var(--md-warning-dark); color: #fff; }

.btn-info       { background: var(--md-info);      color: #fff; }
.btn-info:hover    { background: var(--md-info-dark); color: #fff; }

.btn-secondary  { background: var(--md-secondary); color: #fff; }
.btn-secondary:hover { background: var(--md-secondary-dark); color: #fff; }

.btn-dark       { background: var(--md-dark);      color: #fff; }
.btn-dark:hover    { background: var(--md-darker); color: #fff; }

/* Outline buttons — flat style (no shadow, no border, colored text) */
.btn-outline-primary,
.btn-outline-success,
.btn-outline-danger,
.btn-outline-warning,
.btn-outline-info,
.btn-outline-secondary,
.btn-outline-dark {
    background: transparent;
    box-shadow: none;
    border: none;
}
.btn-outline-primary   { color: var(--md-primary); }
.btn-outline-success   { color: var(--md-success); }
.btn-outline-danger    { color: var(--md-danger); }
.btn-outline-warning   { color: var(--md-warning); }
.btn-outline-info      { color: var(--md-info); }
.btn-outline-secondary { color: var(--md-secondary); }
.btn-outline-dark      { color: var(--md-dark); }

.btn-outline-primary:hover   { background: rgba(25,118,210,0.08); color: var(--md-primary); }
.btn-outline-success:hover   { background: rgba(67,160,71,0.08);  color: var(--md-success); }
.btn-outline-danger:hover    { background: rgba(229,57,53,0.08);  color: var(--md-danger); }
.btn-outline-warning:hover   { background: rgba(251,140,0,0.08);  color: var(--md-warning); }
.btn-outline-info:hover      { background: rgba(3,155,229,0.08);  color: var(--md-info); }
.btn-outline-secondary:hover { background: rgba(120,144,156,0.08);color: var(--md-secondary); }
.btn-outline-dark:hover      { background: rgba(38,50,56,0.08);   color: var(--md-dark); }

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Disabled */
.btn:disabled, .btn.disabled {
    box-shadow: none;
}

/* Button groups — remove double shadow */
.btn-group .btn {
    box-shadow: none;
}
.btn-group {
    box-shadow: var(--md-shadow-1);
    border-radius: var(--md-radius);
}
.btn-group:hover {
    box-shadow: var(--md-shadow-2);
}

/* ── Cards ───────────────────────────────────────────── */
.card {
    border: none;
    border-radius: var(--md-radius);
    box-shadow: var(--md-shadow-1);
    background: var(--md-surface);
    transition: box-shadow var(--md-transition);
}
.card:hover {
    box-shadow: var(--md-shadow-2);
}
.card-header {
    background: var(--md-surface);
    border-bottom: 1px solid var(--md-divider);
    font-weight: 500;
}

/* ── Navbar ──────────────────────────────────────────── */
.navbar {
    box-shadow: var(--md-shadow-2);
    border: none;
}
.navbar-dark, .navbar.bg-dark {
    background-color: var(--md-dark) !important;
}
.navbar-brand {
    font-weight: 500;
    letter-spacing: 0.02em;
    color: #fff !important;
}
.navbar-dark .nav-link,
.navbar.bg-dark .nav-link,
.navbar-dark a,
.navbar.bg-dark a {
    color: rgba(255,255,255,0.85) !important;
}
.navbar-dark .nav-link:hover,
.navbar.bg-dark .nav-link:hover,
.navbar-dark a:hover,
.navbar.bg-dark a:hover {
    color: #fff !important;
}

/* ── Forms ───────────────────────────────────────────── */
.form-control, .form-select {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--md-divider);
    background-color: transparent;
    padding: 0.5rem 0;
    transition: border-color var(--md-transition);
    box-shadow: none !important;
}
.form-control:focus, .form-select:focus {
    border-bottom: 2px solid var(--md-primary);
    background-color: transparent;
    padding-bottom: calc(0.5rem - 1px);
}
.form-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--md-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.25rem;
}

/* Textarea keeps border all around */
textarea.form-control {
    border: 1px solid var(--md-divider);
    border-radius: var(--md-radius);
    padding: 0.5rem;
}
textarea.form-control:focus {
    border: 2px solid var(--md-primary);
    padding: calc(0.5rem - 1px);
}

/* File input */
.form-control[type="file"] {
    border: 1px dashed var(--md-divider);
    border-radius: var(--md-radius);
    padding: 0.5rem;
    background: rgba(0,0,0,0.02);
}
.form-control[type="file"]:focus {
    border: 2px dashed var(--md-primary);
    padding: calc(0.5rem - 1px);
}

/* Range slider */
.form-range::-webkit-slider-thumb {
    background: var(--md-primary);
}
.form-range::-moz-range-thumb {
    background: var(--md-primary);
}
.form-range::-webkit-slider-runnable-track {
    background: var(--md-primary-light);
}
.form-range::-moz-range-track {
    background: var(--md-primary-light);
}

/* ── Modals ──────────────────────────────────────────── */
.modal-content {
    border: none;
    border-radius: var(--md-radius);
    box-shadow: var(--md-shadow-3);
}
.modal-header {
    border-bottom: 1px solid var(--md-divider);
}
.modal-footer {
    border-top: 1px solid var(--md-divider);
}
.modal-title {
    font-weight: 500;
}

/* ── Breadcrumb ──────────────────────────────────────── */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}
.breadcrumb-item a {
    color: var(--md-primary);
    text-decoration: none;
}
.breadcrumb-item a:hover {
    color: var(--md-primary-dark);
}
.breadcrumb-item.active {
    color: var(--md-text-secondary);
}

/* ── Tabs ────────────────────────────────────────────── */
.nav-tabs {
    border-bottom: 2px solid var(--md-divider);
}
.nav-tabs .nav-link {
    border: none;
    border-radius: 0;
    color: var(--md-text-secondary);
    font-weight: 500;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.75rem 1rem;
    position: relative;
    transition: color var(--md-transition);
}
.nav-tabs .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--md-primary);
    transform: scaleX(0);
    transition: transform var(--md-transition);
}
.nav-tabs .nav-link:hover {
    color: var(--md-primary);
    border: none;
    background: rgba(25,118,210,0.04);
}
.nav-tabs .nav-link.active {
    color: var(--md-primary);
    background: transparent;
    border: none;
}
.nav-tabs .nav-link.active::after {
    transform: scaleX(1);
}

/* ── Alerts ──────────────────────────────────────────── */
.alert {
    border: none;
    border-radius: var(--md-radius);
    font-weight: 500;
}
.alert-secondary {
    background: #CFD8DC;
    color: var(--md-text);
}
.alert-success {
    background: #C8E6C9;
    color: #1B5E20;
}
.alert-danger {
    background: #FFCDD2;
    color: #B71C1C;
}
.alert-warning {
    background: #FFE0B2;
    color: #E65100;
}
.alert-info {
    background: #B3E5FC;
    color: #01579B;
}

/* ── Tables ──────────────────────────────────────────── */
.table {
    border-color: var(--md-divider);
}
.table th {
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--md-text-secondary);
}

/* ── List groups ─────────────────────────────────────── */
.list-group-item {
    border-color: var(--md-divider);
    border-radius: 0 !important;
    transition: background var(--md-transition);
}
.list-group-item:hover {
    background: rgba(0,0,0,0.04);
}
.list-group-item.active {
    background: var(--md-primary-light);
    border-color: var(--md-divider);
    color: var(--md-primary-dark);
}
.list-group-flush .list-group-item {
    border-left: none;
    border-right: none;
}

/* ── Footer bar ──────────────────────────────────────── */
.fixed-bottom.bg-dark {
    background-color: var(--md-dark) !important;
}

/* ── Scrollbar (webkit) ──────────────────────────────── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--md-body-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--md-divider);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--md-secondary);
}

/* ── Utility ─────────────────────────────────────────── */
.shadow-sm { box-shadow: var(--md-shadow-1) !important; }
.shadow    { box-shadow: var(--md-shadow-2) !important; }
.shadow-lg { box-shadow: var(--md-shadow-3) !important; }