/* ===== Brand Colors (from logo) ===== */
:root {
    --brand-navy: #1a3a5c;
    --brand-navy-light: #24506e;
    --brand-navy-dark: #122a42;
    --brand-gold: #f5c518;
    --brand-gold-hover: #e0b200;
    --brand-gold-light: #fff3cd;
    --brand-blue: #2d6faa;
    --brand-blue-light: #3a8fd4;
}

[data-theme="dark"] {
    --bs-body-bg: #1a1a2e;
    --bs-body-color: #e0e0e0;
    --bs-card-bg: #16213e;
    --bs-border-color: #2a2a4a;
    --brand-navy: #2d6faa;
    --brand-navy-light: #3a8fd4;
    --brand-navy-dark: #1a3a5c;
    color-scheme: dark;
}

[data-theme="dark"] body {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
}

[data-theme="dark"] .card,
[data-theme="dark"] .modal-content {
    background-color: var(--bs-card-bg);
    border-color: var(--bs-border-color);
    color: var(--bs-body-color);
}

[data-theme="dark"] .table {
    --bs-table-bg: var(--bs-card-bg);
    --bs-table-color: var(--bs-body-color);
    --bs-table-border-color: var(--bs-border-color);
    --bs-table-striped-bg: #1e2a4a;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #0f3460;
    border-color: var(--bs-border-color);
    color: var(--bs-body-color);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #0f3460;
    color: var(--bs-body-color);
}

[data-theme="dark"] .text-muted {
    color: #8a8aaa !important;
}

[data-theme="dark"] .bg-light {
    background-color: #1e2a4a !important;
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--bs-card-bg);
    border-color: var(--bs-border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--bs-body-color);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: #0f3460;
}

[data-theme="dark"] .alert-info {
    background-color: #1e2a4a;
    border-color: #2d6faa;
    color: #8ab4f8;
}

[data-theme="dark"] .alert-danger {
    background-color: #2a1a1a;
    border-color: #8b0000;
    color: #f88a8a;
}

[data-theme="dark"] .alert-warning {
    background-color: #2a2a1a;
    border-color: #8b8000;
    color: #f8e88a;
}

/* DEBT-070 fix: Dark mode alert-success */
[data-theme="dark"] .alert-success {
    background-color: #1a2a1a;
    border-color: #198754;
    color: #8af8a8;
}

/* Breadcrumb dark mode */
[data-theme="dark"] .breadcrumb {
    background-color: transparent;
}

[data-theme="dark"] .breadcrumb-item a {
    color: #7db8e0;
}

[data-theme="dark"] .breadcrumb-item.active {
    color: #adb5bd;
}

[data-theme="dark"] .breadcrumb-item + .breadcrumb-item::before {
    color: #6c757d;
}

/* Badge dark mode */
[data-theme="dark"] .badge.bg-light {
    background-color: #495057 !important;
    color: #dee2e6 !important;
}

/* Input-group dark mode */
[data-theme="dark"] .input-group-text {
    background-color: #495057;
    color: #dee2e6;
    border-color: #6c757d;
}

/* Pagination dark mode */
[data-theme="dark"] .page-link {
    background-color: #2b3035;
    color: #dee2e6;
    border-color: #495057;
}

[data-theme="dark"] .page-item.active .page-link {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

/* DEBT-126 fix: Dark mode disabled pagination */
[data-theme="dark"] .page-item.disabled .page-link {
    background-color: #1e2a3a;
    color: #6c757d;
    border-color: #495057;
}

/* DEBT-084 fix: Dark mode WCAG AA contrast (>= 4.5:1) */
[data-theme="dark"] code {
    color: #e08ab0;
}

[data-theme="dark"] h3 {
    color: #7db8e0;
}

[data-theme="dark"] .metric-card h4 {
    color: #7db8e0;
}

/* DEBT-123 fix: Dark mode link hover contrast */
[data-theme="dark"] a:hover {
    color: #7db8e0;
}

/* DEBT-124 fix: Dark mode form placeholder color */
[data-theme="dark"] .form-control::placeholder {
    color: #8a8aaa;
    opacity: 1;
}

[data-theme="dark"] .form-select::placeholder {
    color: #8a8aaa;
    opacity: 1;
}

/* DEBT-125 fix: Dark mode toast backgrounds */
[data-theme="dark"] .toast {
    background-color: #1e2a4a;
    color: #e0e0e0;
    border-color: #2a2a4a;
}

[data-theme="dark"] .toast .btn-close {
    filter: invert(1);
}

[data-theme="dark"] .toast.bg-success {
    background-color: #1a3a2a !important;
    border-color: #198754;
}

[data-theme="dark"] .toast.bg-danger {
    background-color: #3a1a1a !important;
    border-color: #dc3545;
}

[data-theme="dark"] .toast.bg-warning {
    background-color: #3a3a1a !important;
    border-color: #ffc107;
    color: #f8e88a;
}

[data-theme="dark"] .toast.bg-info {
    background-color: #1a2a3a !important;
    border-color: #0dcaf0;
}

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

h1:focus {
    outline: none;
}

a, .btn-link {
    color: var(--brand-blue);
}

a:hover {
    color: var(--brand-navy);
}

.btn-primary {
    color: #fff;
    background-color: var(--brand-navy);
    border-color: var(--brand-navy-dark);
}

.btn-primary:hover, .btn-primary:active {
    background-color: var(--brand-navy-light);
    border-color: var(--brand-navy);
}

.btn-warning {
    color: var(--brand-navy-dark);
    background-color: var(--brand-gold);
    border-color: var(--brand-gold-hover);
    font-weight: 600;
}

.btn-warning:hover, .btn-warning:active {
    color: var(--brand-navy-dark);
    background-color: var(--brand-gold-hover);
    border-color: #cca000;
}

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

.btn-outline-primary:hover {
    background-color: var(--brand-navy);
    border-color: var(--brand-navy);
    color: #fff;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem var(--brand-blue-light);
}

.content {
    padding-top: 1.1rem;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid red;
}

.validation-message {
    color: red;
}

#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

/* ===== Branded Loading Screen ===== */
.loading-splash {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    inset: 0;
    padding-top: 18vh;
}

.loading-logo {
    margin-bottom: 1.5rem;
    animation: logo-pulse 2s ease-in-out infinite;
}

@keyframes logo-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.04); opacity: 0.85; }
}

.loading-progress {
    display: block;
    width: 8rem;
    height: 8rem;
}

    .loading-progress circle {
        fill: none;
        stroke: #e0e0e0;
        stroke-width: 0.6rem;
        transform-origin: 50% 50%;
        transform: rotate(-90deg);
    }

        .loading-progress circle:last-child {
            stroke: var(--brand-gold, #f5c518);
            stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
            transition: stroke-dasharray 0.05s ease-in-out;
        }

.loading-progress-text {
    text-align: center;
    font-weight: bold;
    margin-top: 0.75rem;
    color: var(--brand-navy, #1a3a5c);
}

    .loading-progress-text:after {
        content: var(--blazor-load-percentage-text, "Loading");
    }

code {
    color: #c02d76;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ===== Navbar Branding ===== */
.navbar-brand-bar {
    background-color: var(--brand-navy);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.navbar-brand-bar .navbar-brand {
    color: #fff;
}

.navbar-brand-bar .brand-text {
    color: var(--brand-gold);
    font-size: 1.15rem;
    letter-spacing: 0.02em;
}

.navbar-brand-bar .nav-link {
    color: rgba(255, 255, 255, 0.85);
}

.navbar-brand-bar .nav-link:hover,
.navbar-brand-bar .nav-link:focus {
    color: var(--brand-gold);
}

.navbar-brand-bar .nav-link.active {
    color: var(--brand-gold);
    font-weight: 600;
}

.navbar-brand-bar .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.3);
}

.navbar-brand-bar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Squares App Custom Styles ===== */

/* Hero section */
.hero-section {
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-navy-dark) 100%);
    color: white;
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 50%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(245, 197, 24, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-gold);
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.hero-logo {
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}


/* Card hover effect for board cards */
.board-card {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    cursor: pointer;
    border-left: 3px solid var(--brand-navy);
}

.board-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-left-color: var(--brand-gold);
}

/* Winner pulse animation */
@keyframes winner-pulse {
    0%, 100% { box-shadow: 0 0 0 2px rgba(245, 197, 24, 0.6), 0 2px 8px rgba(245, 197, 24, 0.3); }
    50%      { box-shadow: 0 0 0 4px rgba(245, 197, 24, 0.8), 0 4px 20px rgba(245, 197, 24, 0.5); }
}

.winner-pulse {
    animation: winner-pulse 1.5s ease-in-out infinite;
}

/* Progress bar in board cards */
.board-progress .progress {
    height: 6px;
}

.board-progress .progress-bar {
    background-color: var(--brand-gold);
}

/* Transaction table styling */
.table td, .table th {
    vertical-align: middle;
}

/* Auth pages */
.auth-page {
    max-width: 400px;
    margin: 2rem auto;
}

.auth-card {
    border-top: 3px solid var(--brand-navy);
}

/* Admin dashboard metric cards */
.metric-card {
    border-top: 3px solid var(--brand-gold);
}

.metric-card .card-body {
    padding: 1.5rem;
}

.metric-card h4 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--brand-navy);
}

/* ===== Board Grid Styles ===== */
.board-grid {
    display: grid;
    gap: 3px;
    max-width: min(90vw, 960px);
    margin: 0 auto;
}

.grid-cell {
    aspect-ratio: 1;
    border: none;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(0.65rem, 1.2vw, 1rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.15s ease;
    padding: 0;
    position: relative;
    overflow: hidden;
}

.grid-cell:hover:not(:disabled) {
    transform: scale(1.08);
    z-index: 2;
    filter: brightness(1.1);
}

.grid-cell:active:not(:disabled) {
    transform: scale(0.97);
}

.grid-cell:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

.grid-cell:focus-visible,
.grid-cell.grid-focused:focus {
    outline: 2px solid var(--bs-primary, #0d6efd);
    outline-offset: 2px;
    z-index: 1;
}

.grid-cell.available {
    background: linear-gradient(145deg, #e2e5e9, #cdd1d6);
    color: #4a5568;
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.5),
                0 1px 3px rgba(0, 0, 0, 0.1);
}

.grid-cell.selected {
    background: linear-gradient(145deg, #4a90d9, #2d6faa);
    color: #ffffff;
    box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.5),
                0 2px 8px rgba(45, 111, 170, 0.4);
}

.grid-cell.owned-mine {
    background: linear-gradient(145deg, #4db6ac, #26a69a);
    color: #ffffff;
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.25),
                0 1px 4px rgba(38, 166, 154, 0.3);
}

.grid-cell.owned-other {
    background: linear-gradient(145deg, #9575cd, #7e57c2);
    color: #ffffff;
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.15),
                0 1px 4px rgba(126, 87, 194, 0.25);
}

.grid-cell.winning {
    background: linear-gradient(145deg, #ffd54f, #f5c518);
    color: #5d4200;
    box-shadow: 0 0 0 2px rgba(245, 197, 24, 0.6),
                0 2px 12px rgba(245, 197, 24, 0.4);
    animation: winner-pulse 1.5s ease-in-out infinite;
}

.grid-cell .number {
    font-size: clamp(0.6rem, 1.1vw, 0.95rem);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.08);
}

/* Responsive grid — large screens */
@media (min-width: 1200px) {
    .board-grid {
        max-width: min(85vw, 960px);
    }
}

@media (min-width: 1600px) {
    .board-grid {
        max-width: min(70vw, 1100px);
    }
}

/* Responsive grid — small screens */
@media (max-width: 576px) {
    .board-grid {
        max-width: 100%;
        gap: 2px;
    }
    .grid-cell {
        border-radius: 3px;
    }
    .hero-section h1 {
        font-size: 1.75rem;
    }
    .hero-logo {
        width: 100px;
        height: 100px;
    }
    /* Large grids (15x15, 20x20) need tighter spacing on mobile */
    .board-grid[style*="--grid-size: 15"],
    .board-grid[style*="--grid-size: 20"] {
        gap: 1px;
    }
    .board-grid[style*="--grid-size: 15"] .grid-cell,
    .board-grid[style*="--grid-size: 20"] .grid-cell {
        border-radius: 2px;
        font-size: 0.5rem;
    }
    .board-grid[style*="--grid-size: 15"] .grid-cell .number,
    .board-grid[style*="--grid-size: 20"] .grid-cell .number {
        font-size: 0.45rem;
    }
}

/* ===== Toast Overrides ===== */
.toast-container .toast {
    min-width: 280px;
    margin-bottom: 0.5rem;
}

/* ===== Confirm Dialog ===== */
.modal.show.d-block {
    animation: fadeIn 0.15s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== Connection Status ===== */
.badge[title*="Real-time"],
.badge[title*="Not connected"],
.badge[title*="Reconnecting"] {
    font-size: 0.65rem;
    padding: 0.25em 0.5em;
}

/* ===== Page Section Headers ===== */
h3 {
    color: var(--brand-navy);
}

/* Print styles */
@media print {
    .navbar, .footer, .toast-container, .breadcrumb,
    .celebration-overlay, .visually-hidden-focusable, .no-print {
        display: none !important;
    }

    .page {
        min-height: auto !important;
    }

    .card {
        border: 1px solid #dee2e6 !important;
        break-inside: avoid;
    }

    .board-grid-container {
        overflow: visible !important;
    }

    a[href]::after {
        content: none !important;
    }

    .receipt-block {
        border: 1px solid #ccc;
        padding: 1.5rem;
    }

    /* DEBT-127 fix: Reset dark theme colors for printing */
    [data-theme="dark"] body,
    [data-theme="dark"] .card,
    [data-theme="dark"] .table {
        background-color: #fff !important;
        color: #212529 !important;
    }

    [data-theme="dark"] .card {
        border-color: #dee2e6 !important;
    }

    [data-theme="dark"] h3,
    [data-theme="dark"] .metric-card h4 {
        color: #1a3a5c !important;
    }

    [data-theme="dark"] a {
        color: #2d6faa !important;
    }

    [data-theme="dark"] .form-control,
    [data-theme="dark"] .form-select {
        background-color: #fff !important;
        color: #212529 !important;
        border-color: #dee2e6 !important;
    }
}

/* === Gameplay UI === */

.gameplay-header {
    background: linear-gradient(135deg, var(--brand-navy) 0%, #0f2440 100%);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
}

.gameplay-timer {
    transition: width 0.1s linear;
}

.gameplay-timer-safe {
    background-color: #198754;
    color: #198754;
}

.gameplay-timer-warning {
    background-color: var(--brand-gold);
    color: var(--brand-gold);
}

.gameplay-timer-danger {
    background-color: #dc3545;
    color: #dc3545;
}

.gameplay-question {
    font-size: 1.4rem;
    font-weight: 500;
    text-align: center;
    padding: 2rem 1rem;
    margin-bottom: 1.5rem;
}

.gameplay-option {
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.gameplay-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.gameplay-result-correct {
    border: 3px solid #198754;
    background-color: rgba(25, 135, 84, 0.1);
}

.gameplay-result-incorrect {
    border: 3px solid #dc3545;
    background-color: rgba(220, 53, 69, 0.1);
}

.gameplay-score-popup {
    animation: scorePopup 0.5s ease-out;
}

@keyframes scorePopup {
    0% { transform: scale(0.5); opacity: 0; }
    70% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* DEBT-071 fix: Dark mode gameplay UI styles */
[data-theme="dark"] .gameplay-header {
    background: linear-gradient(135deg, #0f2440 0%, #0a1628 100%);
}

[data-theme="dark"] .gameplay-question {
    color: var(--bs-body-color);
}

[data-theme="dark"] .gameplay-option {
    background-color: var(--bs-card-bg);
    border-color: var(--bs-border-color);
    color: var(--bs-body-color);
}

[data-theme="dark"] .gameplay-result-correct {
    border-color: #198754;
    background-color: rgba(25, 135, 84, 0.2);
}

[data-theme="dark"] .gameplay-result-incorrect {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.2);
}

/* DEBT-101 fix: Footer dark mode differentiation */
[data-theme="dark"] footer.bg-dark {
    background-color: #0f1a2e !important;
    border-top: 1px solid var(--bs-border-color);
}

/* DEBT-105 fix: Dark mode progress bar track */
[data-theme="dark"] .board-progress .progress,
[data-theme="dark"] .progress {
    background-color: #2a2a4a;
}

/* DEBT-106 fix: Dark mode modal header/footer borders */
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: var(--bs-border-color);
}

/* DEBT-107 fix: Focus ring uses CSS variable instead of hardcoded white */
[data-theme="dark"] .btn:focus,
[data-theme="dark"] .btn:active:focus,
[data-theme="dark"] .btn-link.nav-link:focus,
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem var(--bs-body-bg), 0 0 0 0.25rem var(--brand-blue-light);
}

/* DEBT-083 fix: Respect prefers-reduced-motion for users with vestibular disorders */
@media (prefers-reduced-motion: reduce) {
    .loading-logo,
    .board-grid-cell.winning,
    .gameplay-score-popup,
    .gameplay-option,
    .celebration-overlay,
    .celebration-content {
        animation: none !important;
        transition: none !important;
    }
}