/**
 * EcoTrack — Landlord Admin Design System
 * =========================================
 * Single source of truth for the landlord admin panel visual language.
 * Extends and overrides Bootstrap 4 to produce a coherent modern look.
 *
 * TABLE OF CONTENTS
 * -----------------
 * 1.  Design Tokens (CSS Custom Properties)
 * 2.  Page Layout
 * 3.  Navbar
 * 4.  Flash Alerts (session success/error)
 * 5.  Cards
 * 6.  Page Headers (card-header pattern)
 * 7.  Tables
 * 8.  Buttons
 * 9.  Forms
 * 10. Badges
 * 11. Tabs
 * 12. Empty States
 * 13. Footer
 */


/* =============================================================================
   1. DESIGN TOKENS
   ============================================================================= */

:root {
    /* Brand */
    --ec-navy:        #0f1629;  /* navbar, dark surfaces */
    --ec-navy-mid:    #1a2540;  /* card-header option */
    --ec-teal:        #06b6d4;  /* primary accent — active states, links, focus rings */
    --ec-teal-light:  rgba(6, 182, 212, 0.12);

    /* Neutral surfaces */
    --ec-bg:          #f4f6f9;  /* page background */
    --ec-surface:     #ffffff;  /* card / panel background */
    --ec-border:      #e2e8f0;  /* borders, dividers */
    --ec-border-soft: #f1f5f9;

    /* Text */
    --ec-text:        #1e293b;  /* primary content */
    --ec-text-muted:  #64748b;  /* labels, secondary info */
    --ec-text-subtle: #94a3b8;  /* placeholders, empty states */

    /* Semantic */
    --ec-success:     #16a34a;
    --ec-success-bg:  #f0fdf4;
    --ec-success-border: #bbf7d0;
    --ec-danger:      #dc2626;
    --ec-danger-bg:   #fef2f2;
    --ec-danger-border: #fecaca;
    --ec-warning:     #d97706;
    --ec-warning-bg:  #fffbeb;
    --ec-warning-border: #fde68a;

    /* Elevation */
    --ec-shadow-xs:   0 1px 2px rgba(15, 22, 41, 0.06);
    --ec-shadow-sm:   0 1px 4px rgba(15, 22, 41, 0.08), 0 1px 2px rgba(15, 22, 41, 0.04);
    --ec-shadow-md:   0 4px 12px rgba(15, 22, 41, 0.10), 0 2px 4px rgba(15, 22, 41, 0.06);
    --ec-shadow-lg:   0 12px 32px rgba(15, 22, 41, 0.14), 0 2px 6px rgba(15, 22, 41, 0.06);

    /* Shape */
    --ec-radius-sm:   4px;
    --ec-radius:      8px;
    --ec-radius-lg:   12px;

    /* Motion */
    --ec-transition:  0.15s ease;
}


/* =============================================================================
   2. PAGE LAYOUT
   ============================================================================= */

body {
    background-color: var(--ec-bg);
    color: var(--ec-text);
}

/* Push content below fixed navbar and above fixed footer */
main.col {
    padding-top: 1.5rem !important;
    padding-bottom: 4rem;
    min-height: calc(100vh - 52px - 38px);
}

/* Responsive page wrapper — used in most admin views */
.container-wide {
    max-width: 1480px;
}


/* =============================================================================
   3. NAVBAR
   ============================================================================= */

.ec-nav {
    background: var(--ec-navy);
    border-bottom: 1px solid rgba(6, 182, 212, 0.18);
    padding-top: 0;
    padding-bottom: 0;
    min-height: 52px;
}

.ec-nav .navbar-brand {
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    line-height: 52px;
    padding: 0;
    color: #fff !important;
}
.ec-nav .navbar-brand .brand-eco { color: var(--ec-teal); }

.ec-nav .nav-link {
    font-size: 0.79rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: rgba(203, 213, 225, 0.8) !important;
    padding: 0 10px !important;
    line-height: 50px;
    border-bottom: 2px solid transparent;
    transition: color var(--ec-transition), border-color var(--ec-transition);
    white-space: nowrap;
}

.ec-nav .nav-link:hover,
.ec-nav .nav-link:focus {
    color: #fff !important;
    border-bottom-color: rgba(6, 182, 212, 0.4);
}

.ec-nav .nav-link.active,
.ec-nav .nav-item.active > .nav-link,
.ec-nav .navbar-nav .show > .nav-link {
    color: #fff !important;
    border-bottom-color: var(--ec-teal);
}

/* Dropdown panel */
.ec-nav .dropdown-menu {
    background: var(--ec-surface);
    border: 1px solid rgba(15, 22, 41, 0.08);
    border-radius: var(--ec-radius);
    box-shadow: var(--ec-shadow-lg);
    padding: 6px;
    margin-top: 2px;
    min-width: 195px;
}

.ec-nav li.dropdown-item {
    padding: 0;
    border-radius: var(--ec-radius-sm);
    background: transparent;
    transition: background var(--ec-transition);
}
.ec-nav li.dropdown-item:hover { background: var(--ec-border-soft); }

.ec-nav li.dropdown-item a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ec-text) !important;
    text-decoration: none;
    border-radius: var(--ec-radius-sm);
}

.ec-nav li.dropdown-item a i {
    width: 14px;
    text-align: center;
    opacity: 0.55;
    flex-shrink: 0;
    font-size: 0.8rem;
}
.ec-nav li.dropdown-item:hover a i { opacity: 0.85; }

.ec-nav .dropdown-divider {
    border-color: var(--ec-border);
    margin: 4px 0;
}

/* Profile avatar button */
.ec-nav .ec-profile-btn {
    display: flex;
    align-items: center;
    padding: 0 12px !important;
    line-height: 52px;
    border-bottom: none !important;
    background: rgba(255, 255, 255, 0.04);
    transition: background var(--ec-transition);
}
.ec-nav .ec-profile-btn:hover {
    background: rgba(255, 255, 255, 0.09) !important;
    color: #fff !important;
    border-bottom-color: transparent !important;
}
.ec-nav .ec-profile-btn i { font-size: 1.1rem; }


/* =============================================================================
   4. FLASH ALERTS
   ============================================================================= */

main > .alert {
    border-radius: var(--ec-radius);
    border-left-width: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--ec-shadow-xs);
}

main > .alert-success {
    background: var(--ec-success-bg);
    border-color: var(--ec-success-border);
    border-left-color: var(--ec-success);
    color: #14532d;
}

main > .alert-danger {
    background: var(--ec-danger-bg);
    border-color: var(--ec-danger-border);
    border-left-color: var(--ec-danger);
    color: #7f1d1d;
}


/* =============================================================================
   5. CARDS
   ============================================================================= */

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

/* Nested / filter card inside a card */
.card .card {
    box-shadow: none;
    border-color: var(--ec-border);
}


/* =============================================================================
   6. PAGE HEADERS (card-header pattern)
   ============================================================================= */

.card-header {
    background: var(--ec-surface);
    border-bottom: 1px solid var(--ec-border);
    padding: 14px 20px;
    border-radius: var(--ec-radius) var(--ec-radius) 0 0 !important;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--ec-text);
    letter-spacing: 0.01em;
}

.card-header .card-title,
.card-header h5 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ec-text);
    margin-bottom: 0;
}

.card-header small,
.card-header .text-muted {
    font-size: 0.78rem;
    color: var(--ec-text-muted) !important;
    font-weight: 400;
}

.card-body {
    padding: 20px;
}


/* =============================================================================
   7. TABLES
   ============================================================================= */

.table {
    font-size: 0.84rem;
    color: var(--ec-text);
    margin-bottom: 0;
}

.table thead th {
    background: var(--ec-bg);
    border-bottom: 2px solid var(--ec-border);
    border-top: none;
    padding: 10px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ec-text-muted);
    white-space: nowrap;
}

.table tbody tr {
    transition: background var(--ec-transition);
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

.table td {
    padding: 10px 12px;
    border-color: var(--ec-border-soft);
    vertical-align: middle;
}

.table-bordered {
    border-color: var(--ec-border);
}
.table-bordered td,
.table-bordered th {
    border-color: var(--ec-border);
}

/* Empty row */
.table tbody tr td[colspan] {
    padding: 40px 20px;
    color: var(--ec-text-muted);
    font-size: 0.85rem;
}


/* =============================================================================
   8. BUTTONS
   ============================================================================= */

.btn {
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: var(--ec-radius-sm);
    padding: 6px 14px;
    transition: all var(--ec-transition);
    letter-spacing: 0.01em;
}

.btn-sm {
    font-size: 0.78rem;
    padding: 4px 10px;
    border-radius: var(--ec-radius-sm);
}

.btn-success {
    background-color: var(--ec-success);
    border-color: var(--ec-success);
    color: #fff;
}
.btn-success:hover {
    background-color: #15803d;
    border-color: #15803d;
    color: #fff;
}

.btn-primary {
    background-color: #2563eb;
    border-color: #2563eb;
    color: #fff;
}
.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    color: #fff;
}

.btn-secondary {
    background-color: #475569;
    border-color: #475569;
    color: #fff;
}
.btn-secondary:hover {
    background-color: #334155;
    border-color: #334155;
    color: #fff;
}

.btn-danger {
    background-color: var(--ec-danger);
    border-color: var(--ec-danger);
    color: #fff;
}
.btn-danger:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
    color: #fff;
}

.btn-outline-secondary {
    color: var(--ec-text-muted);
    border-color: var(--ec-border);
}
.btn-outline-secondary:hover {
    background-color: var(--ec-bg);
    border-color: #cbd5e1;
    color: var(--ec-text);
}

.btn-outline-primary {
    color: #2563eb;
    border-color: #93c5fd;
}
.btn-outline-primary:hover {
    background-color: #eff6ff;
    border-color: #2563eb;
    color: #1d4ed8;
}

.btn-outline-danger {
    color: var(--ec-danger);
    border-color: #fca5a5;
}
.btn-outline-danger:hover {
    background-color: var(--ec-danger-bg);
    border-color: var(--ec-danger);
    color: #b91c1c;
}


/* =============================================================================
   9. FORMS
   ============================================================================= */

.form-control {
    font-size: 0.85rem;
    border-color: var(--ec-border);
    border-radius: var(--ec-radius-sm);
    color: var(--ec-text);
    padding: 7px 11px;
    transition: border-color var(--ec-transition), box-shadow var(--ec-transition);
}

.form-control:focus {
    border-color: var(--ec-teal);
    box-shadow: 0 0 0 3px var(--ec-teal-light);
    color: var(--ec-text);
}

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

.form-control[disabled],
.form-control[readonly] {
    background-color: var(--ec-bg);
    color: var(--ec-text-muted);
}

.form-control.is-invalid {
    border-color: var(--ec-danger);
}
.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ec-text-muted);
    margin-bottom: 4px;
}

.form-group { margin-bottom: 1.1rem; }

/* Input groups */
.input-group .btn {
    border-color: var(--ec-border);
}
.input-group .form-control:not(:last-child) {
    border-right: none;
}

/* Inline validation errors */
.invalid-feedback,
.text-danger.small {
    font-size: 0.78rem;
    margin-top: 4px;
}

.alert.py-2 {
    font-size: 0.82rem;
    border-radius: var(--ec-radius-sm);
}

/* Select2 alignment with form-control */
.select2-container--default .select2-selection--single {
    border-color: var(--ec-border);
    border-radius: var(--ec-radius-sm);
    height: 36px;
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
    line-height: 34px;
    font-size: 0.85rem;
    color: var(--ec-text);
}
.select2-container--default.select2-container--focus .select2-selection--single {
    border-color: var(--ec-teal);
    box-shadow: 0 0 0 3px var(--ec-teal-light);
}


/* =============================================================================
   10. BADGES
   ============================================================================= */

.badge {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 7px;
    border-radius: 4px;
    letter-spacing: 0.02em;
}

.badge-secondary {
    background-color: #e2e8f0;
    color: #475569;
}

.badge-success {
    background-color: var(--ec-success-bg);
    color: var(--ec-success);
    border: 1px solid var(--ec-success-border);
}

.badge-danger {
    background-color: var(--ec-danger-bg);
    color: var(--ec-danger);
    border: 1px solid var(--ec-danger-border);
}

.badge-warning {
    background-color: var(--ec-warning-bg);
    color: var(--ec-warning);
    border: 1px solid var(--ec-warning-border);
}

.badge-primary {
    background-color: #eff6ff;
    color: #2563eb;
    border: 1px solid #bfdbfe;
}


/* =============================================================================
   11. TABS
   ============================================================================= */

.nav-tabs {
    border-bottom: 2px solid var(--ec-border);
    margin-bottom: 1.25rem;
}

.nav-tabs .nav-link {
    font-size: 0.83rem;
    font-weight: 500;
    color: var(--ec-text-muted);
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    padding: 8px 16px;
    border-radius: 0;
    transition: color var(--ec-transition), border-color var(--ec-transition);
}

.nav-tabs .nav-link:hover {
    color: var(--ec-text);
    border-bottom-color: var(--ec-border);
}

.nav-tabs .nav-link.active {
    color: var(--ec-navy);
    font-weight: 600;
    border-bottom-color: var(--ec-teal);
    background: transparent;
}


/* =============================================================================
   12. EMPTY STATES
   ============================================================================= */

.table tbody tr td[colspan],
.ec-empty {
    padding: 48px 20px;
    text-align: center;
    color: var(--ec-text-subtle);
    font-size: 0.85rem;
}

.ec-empty i {
    display: block;
    font-size: 2rem;
    margin-bottom: 10px;
    opacity: 0.3;
}


/* =============================================================================
   13. FOOTER
   ============================================================================= */

.fixed-bottom {
    background: var(--ec-surface);
    border-top: 1px solid var(--ec-border);
}

.fixed-bottom p {
    font-size: 0.76rem;
    color: var(--ec-text-subtle) !important;
}

.fixed-bottom .font-weight-bold {
    color: var(--ec-teal) !important;
}


/* =============================================================================
   14. AUTH PAGES (login, 2FA)
   ============================================================================= */

.ec-auth-main {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2.5rem 1rem 5rem;
    min-height: calc(100vh - 52px - 38px);
}

.ec-auth-card {
    width: 100%;
    
    max-width: 440px;
    background: var(--ec-surface);
    border: 1px solid var(--ec-border);
    border-radius: var(--ec-radius-lg);
    box-shadow: var(--ec-shadow-md);
    overflow: hidden;
}

.ec-auth-card.ec-auth-card-wide {
    max-width: 520px;
}

.ec-auth-card .card-header {
    text-align: center;
    padding: 22px 24px 18px;
    border-bottom: 1px solid var(--ec-border);
}

.ec-auth-card .card-header h1 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ec-text);
    margin: 0 0 4px;
}

.ec-auth-card .card-header p {
    font-size: 0.8rem;
    color: var(--ec-text-muted);
    margin: 0;
}

.ec-auth-card .card-body {
    padding: 24px;
}

.ec-auth-card .form-group {
    margin-bottom: 1.25rem;
}

.ec-auth-card .form-group:last-of-type {
    margin-bottom: 0;
}

.ec-auth-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 1.5rem;
}

.ec-auth-actions .btn {
    flex: 1 1 auto;
    min-width: 120px;
}

.ec-auth-secret {
    display: inline-block;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--ec-navy);
    background: var(--ec-bg);
    border: 1px solid var(--ec-border);
    border-radius: var(--ec-radius-sm);
    padding: 8px 14px;
    margin: 12px 0;
}

.ec-auth-qr {
    display: inline-block;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--ec-border);
    border-radius: var(--ec-radius);
    margin: 16px 0;
    box-shadow: var(--ec-shadow-xs);
}

.ec-auth-qr img,
.ec-auth-qr svg {
    display: block;
    max-width: 180px;
    height: auto;
}

.ec-auth-copy {
    font-size: 0.84rem;
    color: var(--ec-text-muted);
    line-height: 1.55;
    margin-bottom: 0;
}

.ec-auth-inline-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-start;
}

.ec-auth-inline-form .form-control {
    flex: 1 1 160px;
    min-width: 0;
}

.ec-auth-inline-form .btn {
    flex: 0 0 auto;
}

.ec-auth-flash {
    max-width: 440px;
    margin: 0 auto 1rem;
}

.ec-auth-flash.ec-auth-flash-wide {
    max-width: 520px;
}