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

a, .btn-link {
    color: #006bb7;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.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 #258cfb;
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

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

.invalid {
    outline: 1px solid #e50000;
}
.brand-logo {
	height: 32px;
	width: auto;
	vertical-align: middle;
	display: inline-block;
	margin-right: 8px;
}
/* Two-line brand text to show "by Omega" on its own line */
.brand-text {
	display: inline-flex;
	flex-direction: column;
	justify-content: center;
	vertical-align: middle;
	color: #d7d7d7;
	line-height: 1;
	margin-left: 4px;
}

.brand-main {
	font-size: 1.05rem;
	font-weight: 600;
	line-height: 1;
}

.brand-sub {
	font-size: 0.75rem;
	opacity: 0.85;
	margin-top: 2px;
	line-height: 1;
}

.validation-message {
    color: #e50000;
}

.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."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

/* Sudoku link styles */
.nav-link.sudoku-link {
  color: #0d6efd;               /* default text color */
  background: transparent;
  border-radius: 6px;
  padding: 0.35rem 0.5rem;
  transition: background-color .15s ease, color .15s ease, transform .08s ease;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}

/* hover / focus */
.nav-link.sudoku-link:hover,
.nav-link.sudoku-link:focus {
  background-color: rgba(13,110,253,0.08);
  color: #0b5ed7;
  text-decoration: none;
  transform: translateY(-1px);
}

/* active state (NavLink applies .active) */
.nav-link.sudoku-link.active {
  background-color: #0d6efd;
  color: #fff !important;
  box-shadow: 0 2px 6px rgba(13,110,253,0.2);
}

/* style the icon inside the link */
.nav-link.sudoku-link .bi-grid-3x3-nav-menu {
  font-size: 1.05rem;
  line-height: 1;
  color: inherit;
}

/* stronger specificity if Bootstrap overrides your rules */
.nav-item .nav-link.sudoku-link.active {
  background-color: #0d6efd;
  color: #fff;
}

/* Responsive overrides for Sudoku Solver nav link */

/* Small screens / collapsed nav: make the link full-width and touch-friendly */
@media (max-width: 575.98px) {
  .nav-link.sudoku-link {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;          /* larger tappable text */
    text-align: center;
    border-radius: 0.25rem;
    gap: 0.5rem;
  }

  /* slightly separate the icon on small screens */
  .nav-link.sudoku-link .bi-grid-3x3-nav-menu {
    margin-right: 0.5rem;
  }
}

/* Medium screens: slightly adjusted padding / font-size */
@media (min-width: 576px) and (max-width: 991.98px) {
  .nav-link.sudoku-link {
    display: inline-flex;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
  }
}

/* Large+ screens: original compact inline style */
@media (min-width: 992px) {
  .nav-link.sudoku-link {
    display: inline-flex;
    padding: 0.35rem 0.5rem;
    font-size: 0.95rem;
  }
}

/* Tweak for very small screens */
@media (max-width: 360px) {
	.main-number, .main-input, .edit-input {
		font-size: 16px;
	}


	/* If Bootstrap specificity overrides your rules, increase specificity */
	.nav-item .nav-link.sudoku-link {
		/* fallback styling */
	}

	/* Responsive Sudoku grid: use viewport-based sizing and keep cells square */
	.sudoku-container {
		width: 100%;
		padding: 12px;
		box-sizing: border-box;
		display: flex;
		justify-content: center;
		overflow-x: auto; /* allow horizontal scroll if it cannot fit */
	}

	/* The grid will be at most 90% of viewport width but no larger than 560px */
	.sudoku-grid {
		width: min(90vw, 560px);
		max-width: 100%;
		background-color: #333;
		padding: 6px;
		box-sizing: border-box;
	}

	/* Keep blocks/padding small and proportional */
	.block {
		padding: 3px;
		box-sizing: border-box;
	}

	/* Make each cell a responsive square using aspect-ratio */
	.cell {
		position: relative;
		width: calc((100% - 8px) / 9); /* 9 cells per row, subtract small gaps */
		aspect-ratio: 1 / 1;
		box-sizing: border-box;
		border: 1px solid #ddd;
		background-color: #fff;
		cursor: pointer;
	}

	/* Ensure the main number and edit input scale with the cell */
	.main-number,
	.main-input,
	.edit-input {
		font-size: calc(14px + 1.2vw); /* scales between small and larger screens */
		line-height: 1;
	}