/* ==========================================
  GLOBAL CSS - Dentiluri Website
  Base styles, variables, and utility classes
========================================== */

:root {
	/* Colors */
	--background: hsl(0, 0%, 100%);
	--foreground: hsl(222.2, 84%, 4.9%);
	--card: hsl(0, 0%, 100%);
	--card-foreground: hsl(222.2, 84%, 4.9%);
	--popover: hsl(0, 0%, 100%);
	--popover-foreground: hsl(222.2, 84%, 4.9%);
	--primary: hsl(167.8, 40.5%, 47.5%);
	--primary-foreground: hsl(210, 40%, 98%);
	--secondary: hsl(210, 40%, 96.1%);
	--secondary-foreground: hsl(222.2, 47.4%, 11.2%);
	--muted: hsl(210, 40%, 96.1%);
	--muted-foreground: hsl(215.4, 16.3%, 46.9%);
	--accent: hsl(210, 40%, 96.1%);
	--accent-foreground: hsl(222.2, 47.4%, 11.2%);
	--destructive: hsl(0, 84.2%, 60.2%);
	--destructive-foreground: hsl(210, 40%, 98%);
	--border: hsl(214.3, 31.8%, 91.4%);
	--input: hsl(214.3, 31.8%, 91.4%);
	--ring: hsl(167.8, 40.5%, 47.5%);
	--radius: 0.5rem;

	/* Shadows*/
	--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
	--shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1),
		0 2px 4px -2px rgb(0 0 0 / 0.1);
	--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
		0 4px 6px -4px rgb(0 0 0 / 0.1);

	/* Font sizes */
	--font-size-xs: 0.75rem;
	--font-size-sm: 0.875rem;
	--font-size-base: 1rem;
	--font-size-lg: 1.125rem;
	--font-size-xl: 1.25rem;
	--font-size-2xl: 1.5rem;
	--font-size-3xl: 1.875rem;
	--font-size-4xl: 2.25rem;
	--font-size-5xl: 3rem;
	--font-size-6xl: 3.75rem;

	/* Spacing */
	--spacing-1: 0.25rem;
	--spacing-2: 0.5rem;
	--spacing-3: 0.75rem;
	--spacing-4: 1rem;
	--spacing-6: 1.5rem;
	--spacing-8: 2rem;
	--spacing-12: 3rem;
	--spacing-16: 4rem;
	--spacing-24: 6rem;
	--spacing-32: 8rem;

	/* Animations */
	--transition-fast: 150ms;
	--transition-normal: 250ms;
	--transition-slow: 350ms;
}

/* Dark theme colors */
.dark {
	--background: hsl(222.2, 84%, 4.9%);
	--foreground: hsl(210, 40%, 98%);
	--card: hsl(222.2, 84%, 4.9%);
	--card-foreground: hsl(210, 40%, 98%);
	--popover: hsl(222.2, 84%, 4.9%);
	--popover-foreground: hsl(210, 40%, 98%);
	--primary: hsl(167.8, 40.5%, 47.5%);
	--primary-foreground: hsl(222.2, 47.4%, 11.2%);
	--secondary: hsl(217.2, 32.6%, 17.5%);
	--secondary-foreground: hsl(210, 40%, 98%);
	--muted: hsl(217.2, 32.6%, 17.5%);
	--muted-foreground: hsl(215, 20.2%, 65.1%);
	--accent: hsl(217.2, 32.6%, 17.5%);
	--accent-foreground: hsl(210, 40%, 98%);
	--destructive: hsl(0, 62.8%, 30.6%);
	--destructive-foreground: hsl(210, 40%, 98%);
	--border: hsl(217.2, 32.6%, 17.5%);
	--input: hsl(217.2, 32.6%, 17.5%);
	--ring: hsl(167.8, 40.5%, 47.5%);
}

/* === Reset and Base Styles === */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	scroll-behavior: smooth;
}

body {
	font-family: Arial, Helvetica, sans-serif;
	line-height: 1.5;
	color: var(--foreground);
	background-color: var(--background);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	transition: background-color var(--transition-normal);
}

img,
svg {
	display: block;
	max-width: 100%;
	height: auto;
}

button,
input,
select,
textarea {
	font: inherit;
	color: inherit;
}

button {
	cursor: pointer;
	background: none;
	border: none;
}

a {
	color: inherit;
	text-decoration: none;
}

ul,
ol {
	list-style: none;
}

/* === Layout === */
.container {
	width: 100%;
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 var(--spacing-8);
}

.grid-2-columns {
	display: grid;
	gap: var(--spacing-8);
}

.grid-3-columns {
	display: grid;
	gap: var(--spacing-8);
}

@media (min-width: 768px) {
	.grid-2-columns {
		grid-template-columns: repeat(2, 1fr);
	}

	.grid-3-columns {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 1024px) {
	.grid-3-columns {
		grid-template-columns: repeat(3, 1fr);
	}
}

.flex {
	display: flex;
}

.flex-col {
	flex-direction: column;
}

.items-center {
	align-items: center;
}

.justify-center {
	justify-content: center;
}

.justify-between {
	justify-content: space-between;
}

.gap-1 {
	gap: var(--spacing-1);
}

.gap-2 {
	gap: var(--spacing-2);
}

.gap-4 {
	gap: var(--spacing-4);
}

.gap-6 {
	gap: var(--spacing-6);
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
	font-weight: 700;
	line-height: 1.2;
	margin-bottom: var(--spacing-4);
}

h1 {
	font-size: var(--font-size-4xl);
}

h2 {
	font-size: var(--font-size-3xl);
}

h3 {
	font-size: var(--font-size-xl);
}

p {
	margin-bottom: var(--spacing-4);
}

.text-sm {
	font-size: var(--font-size-sm);
}

.text-lg {
	font-size: var(--font-size-lg);
}

.text-xl {
	font-size: var(--font-size-xl);
}

.font-medium {
	font-weight: 500;
}

.font-bold {
	font-weight: 700;
}

.text-muted {
	color: var(--muted-foreground);
}

.text-center {
	text-align: center;
}

/* === Buttons === */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: var(--spacing-3) var(--spacing-3);
	font-weight: 500;
	border-radius: var(--radius);
	transition: all var(--transition-fast);
	white-space: nowrap;
}

.btn-lg {
	padding: var(--spacing-4) var(--spacing-8);
	font-size: var(--font-size-lg);
}

.btn-primary {
	background-color: var(--primary);
	color: var(--primary-foreground);
	border: 1px solid var(--primary);
}

.btn-primary:hover {
	background-color: hsl(173, 80%, 35%);
}

.btn-outline {
	background-color: transparent;
	border: 1px solid var(--border);
	color: var(--foreground);
}

.btn-outline:hover {
	background-color: var(--secondary);
}

.btn-block {
	display: block;
	width: 100%;
}

.btn .icon-right {
	margin-left: var(--spacing-2);
}

/* === Forms === */
.form-group {
	margin-bottom: var(--spacing-4);
}

.form-row {
	display: grid;
	gap: var(--spacing-4);
	margin-bottom: var(--spacing-4);
}

@media (min-width: 576px) {
	.form-row {
		grid-template-columns: repeat(2, 1fr);
	}
}

label {
	display: block;
	font-size: var(--font-size-sm);
	font-weight: 500;
	margin-bottom: var(--spacing-2);
}

input,
textarea,
select {
	width: 100%;
	padding: var(--spacing-3);
	border-radius: var(--radius);
	border: 1px solid var(--input);
	background-color: var(--background);
	transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
	outline: none;
	border-color: var(--ring);
	box-shadow: 0 0 0 2px color-mix(in srgb, var(--ring) 20%, transparent);
}

textarea {
	min-height: 100px;
	resize: vertical;
}

/* === Badges and Icons === */
.badge {
	display: inline-block;
	padding: var(--spacing-1) var(--spacing-3);
	font-size: var(--font-size-sm);
	font-weight: 500;
	border-radius: var(--radius);
	background-color: color-mix(in srgb, var(--primary) 15%, transparent);
	color: var(--primary);
	margin-bottom: var(--spacing-2);
}

.icon {
	width: 1.5rem;
	height: 1.5rem;
	stroke-width: 2;
}

/* === Cards === */
.card {
	background-color: var(--card);
	border-radius: var(--radius);
	border: 1px solid var(--border);
	overflow: hidden;
	box-shadow: var(--shadow-sm);
	transition: box-shadow var(--transition-fast),
		transform var(--transition-fast);
}

.card:hover {
	box-shadow: var(--shadow-md);
	transform: translateY(-2px);
}

.card-header {
	padding: var(--spacing-6);
	border-bottom: 1px solid var(--border);
}

.card-content {
	padding: var(--spacing-6);
}

.card-footer {
	padding: var(--spacing-6);
	border-top: 1px solid var(--border);
}

/* === Sections === */
section {
	padding: var(--spacing-16) 0;
}

section:nth-child(even) {
	background-color: var(--secondary);
}

.section-header {
	margin-bottom: var(--spacing-12);
}

/* === Utilities === */
.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border-width: 0;
}

.hidden {
	display: none;
}

.invisible {
	visibility: hidden;
}

@media (min-width: 768px) {
	.md\:block {
		display: block;
	}

	.md\:hidden {
		display: none;
	}

	.md\:flex {
		display: flex;
	}
}

/* === Animation === */
@keyframes fadeIn {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}

.fade-in {
	animation: fadeIn var(--transition-normal) ease-in;
}

/* Rotating loading indicator */
@keyframes rotate {
	from {
		transform: rotate(0deg);
	}
	to {
		transform: rotate(360deg);
	}
}

.loading {
	animation: rotate 1s linear infinite;
}