/*****************************************************
 * LAYOUT - Grid System & Page Structure
 * Uses modern CSS Grid (no framework needed!)
 *****************************************************/

/*===========================================
  BASE LAYOUT
===========================================*/

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

body {
	font-family: var(--font-primary);
	font-size: var(--text-base);
	color: var(--text-primary);
	background-color: var(--bg-body);
	line-height: var(--leading-normal);
}

/*===========================================
  MAIN CONTAINER
===========================================*/

#main {
	max-width: var(--container-xl);
	margin: 0 auto;
	background-color: var(--color-white);
	box-shadow: var(--shadow-xl);
	/* CRITICAL: Prevent overflow */
	overflow-x: hidden;
	/* Responsive width - adapts to screen size */
	width: calc(100% - 40px); /* 20px margin on each side on small screens */
}

/* Responsive breakpoints for better use of screen space */
@media (min-width: 768px) {
	#main {
		width: calc(100% - 80px); /* 40px margin on each side on tablets */
	}
}

@media (min-width: 1024px) {
	#main {
		width: calc(100% - 120px); /* 60px margin on each side on desktop */
	}
}

@media (min-width: 1440px) {
	#main {
		width: calc(
			100% - 200px
		); /* 100px margin on each side on large screens */
	}
}

@media (min-width: 1920px) {
	#main {
		width: 1720px; /* Fixed max width on very large screens (1920px - 200px) */
	}
}

/* Alternative: Percentage-based approach */
/* Uncomment this and remove the above if you prefer percentage-based */
/*
@media (min-width: 768px) {
  #main {
    width: 90%;
  }
}

@media (min-width: 1024px) {
  #main {
    width: 85%;
  }
}

@media (min-width: 1440px) {
  #main {
    width: 80%;
  }
}
*/

/*===========================================
  HEADER
===========================================*/
#header {
	min-height: var(--header-height-mobile);
	padding: var(--space-md);
	padding-left: var(--space-xl);
	background-image: linear-gradient(
		90deg,
		var(--color-primary) 0%,
		var(--color-primary) 35%,
		var(--color-primary-dark) 65%,
		var(--color-primary-darker) 100%
	);
	border-left: 1px solid var(--color-black);
	border-right: 1px solid var(--color-black);
	display: flex;
	align-items: center;
	justify-content: left;
	gap: var(--space-2xl);
	color: var(--text-on-primary);
}

.header-logo {
	max-width: 125px;
	max-height: 125px;
}

@media (max-width: 480px) {

	#header {
	gap: var(--space-xs);

}
	.header-logo {
		max-width: 80px;
		max-height: 80px;
	}
}

#subtitle {
	color: var(--text-on-primary);
	font-family: var(--font-heading);
	font-weight: var(--font-bold);
	font-size: clamp(1rem, 2.2vw, 1.375rem);
	line-height: var(--leading-tight);
	text-shadow:
		0 1px 1px rgba(0, 0, 0, 0.35),
		0 2px 6px rgba(0, 0, 0, 0.3);
}

#download_tasks {
	position: absolute;
	right: var(--space-md);
	top: var(--space-md);
	min-width: 300px;
	max-width: 400px;
	padding: var(--space-sm) var(--space-md);
	background-color: var(--color-secondary);
	color: var(--text-on-primary);
	font-size: var(--text-sm);
	border-radius: var(--radius-md);
	background-image: url(/search/package.png);
	background-position: 235px center;
	background-repeat: no-repeat;
	background-size: 36px 36px;
}

/*===========================================
  NAVIGATION TABS
===========================================*/

#tabs {
	height: 32px;
	background-color: var(--color-primary-dark);
	border-left: 1px solid var(--color-black);
	border-right: 1px solid var(--color-black);
	border-bottom: 1px solid var(--color-black);
	overflow: visible;
}

/* Top Navigation Menu */
ul.topnav {
	list-style: none;
	padding: 0 var(--space-md);
	margin: 0;
	display: flex;
	justify-content: flex-end;
	gap: var(--space-xs);
}

ul.topnav li {
	position: relative;
	padding: var(--space-xs) var(--space-md);
	border: 1px solid var(--color-black);
	border-bottom: none;
	background-color: #d7ebf9;
	color: var(--text-primary);
	font-weight: var(--font-semibold);
	border-radius: var(--radius-lg) var(--radius-lg) 0 0;
	transition: background-color var(--transition-fast);
}

ul.topnav li a {
	color: var(--text-primary);
	text-decoration: none;
}

ul.topnav li.topmenu-active,
ul.topnav li:hover {
	background-color: var(--color-white);
}

/* Dropdown menus */
ul.topnav li ul {
	display: none;
	position: absolute;
	left: -1px;
	top: 100%;
	list-style: none;
	padding: var(--space-sm) 0;
	margin: 0;
	background: var(--color-white);
	border: 1px solid var(--color-black);
	border-radius: 0 0 var(--radius-lg) var(--radius-lg);
	box-shadow: var(--shadow-lg);
	min-width: 180px;
	z-index: var(--z-dropdown);
}

ul.topnav li:hover > ul {
	display: block;
}

ul.topnav li ul li {
	border: none;
	border-radius: 0;
	padding: var(--space-xs) var(--space-md);
	background-color: transparent;
	font-weight: var(--font-normal);
}

ul.topnav li ul li:hover {
	background-color: var(--color-gray-100);
}

/* Mobile menu toggle */
ul.topnav.hide-on-desktop {
	display: none;
}

/*===========================================
  PAGE CENTRAL - Grid Layout
===========================================*/

#page_central {
	background-color: var(--bg-body);
	border-left: 1px solid var(--color-black);
	border-right: 1px solid var(--color-black);
	/* CRITICAL: Prevent overflow */
	overflow-x: hidden;
	max-width: 100%;
}

/*===========================================
  SIDEBAR
===========================================*/

#sidebar {
	padding: var(--space-md) var(--space-sm) var(--space-md) var(--space-md);
	background-color: var(--bg-sidebar);
	border-right: 1px solid var(--border-color);
	font-size: var(--text-sm);
  display:none;
}

#sidebar ul {
	list-style: none;
	padding-left: var(--space-md);
	margin: 0;
}

#sidebar ul li {
	padding: var(--space-xs) 0;
}

#sidebar ul li::before {
	content: "› ";
	margin-right: var(--space-xs);
}

#sidebar ul ul {
	padding-left: var(--space-lg);
	margin-top: var(--space-xs);
}

#sidebar a {
	color: var(--text-primary);
	text-decoration: none;
	transition: color var(--transition-fast);
}

#sidebar a:hover {
	color: var(--color-primary);
	text-decoration: underline;
}

@media (max-width: 480px) {
	#sidebar{
    display: visible !important;
  }
}

/*===========================================
  MAIN CONTENT
===========================================*/

#contents {
	padding: var(--space-lg);
	background-color: var(--bg-content);
	color: var(--text-primary);
	min-height: 500px;
	overflow-x: hidden;
	max-width: 100%;
}

#contents a {
	color: var(--text-link);
	text-decoration: none;
	transition: color var(--transition-fast);
}

#contents a:hover {
	color: var(--text-link-hover);
	text-decoration: underline;
}

/*===========================================
  FOOTER
===========================================*/

#footer {
	padding: var(--space-sm) var(--space-md);
	background-color: var(--bg-footer);
	color: var(--text-on-primary);
	font-size: var(--text-sm);
	text-align: right;
	border-left: 1px solid var(--color-black);
	border-right: 1px solid var(--color-black);
	border-bottom: 1px solid var(--color-black);
	border-radius: 0 0 var(--radius-md) var(--radius-md);
}

#footer a {
	color: var(--text-on-primary);
	text-decoration: underline;
}

/*===========================================
  RESPONSIVE BREAKPOINTS
===========================================*/

/* Tablet: 768px - 1024px */
@media (min-width: 768px) and (max-width: 1024px) {
	#header {
		min-height: var(--header-height-tablet);
		background-size:
			auto 80px,
			100% 100%;
	}

	#page_central {
		grid-template-columns: 25% 1fr;
	}
}

/* Desktop: 1025px+ */
@media (min-width: 1025px) {
	#header {
		min-height: var(--header-height-desktop);
		background-size:
			auto 100px,
			100% 100%;
	}

	#main {
		box-shadow: var(--shadow-xl);
	}
}

/* Mobile: up to 767px */
@media (max-width: 767px) {
	#page_central {
		grid-template-columns: 1fr;
	}

	#sidebar {
		display: none;
	}

	#subtitle {
		margin-left: var(--space-md);
		font-size: var(--text-base);
	}

	ul.topnav {
		display: none;
	}

	ul.topnav.hide-on-desktop {
		display: flex;
	}
}

/* Utility Classes */
.hide-on-mobile {
	display: block;
}

.hide-on-tablet {
	display: block;
}

.hide-on-desktop {
	display: none;
}

@media (max-width: 767px) {
	.hide-on-mobile {
		display: none !important;
	}
}

@media (min-width: 768px) and (max-width: 1024px) {
	.hide-on-tablet {
		display: none !important;
	}
}

@media (min-width: 1025px) {
	.hide-on-desktop {
		display: none !important;
	}
}