/* public/style.css */
:root {
	--primary-bg: #0A0D11;
	--secondary-bg: #1C212A;
	--header-bg-start: #2A3F5F;
	--header-bg-end: #141A28;
	--accent-color: #61DAFB;
	--accent-hover: #98EEFF;
	--button-main-color: #2ECC71;
	--button-secondary-color: #3498DB;
	--text-light: #E0E6EB;
	--text-muted: #9BA4AD;
	--border-color: rgba(255, 255, 255, 0.08);
	--border-radius-lg: 16px;
	--border-radius-md: 10px;
	--box-shadow-light: 0 6px 18px rgba(0, 0, 0, 0.3);
	--box-shadow-heavy: 0 12px 40px rgba(0, 0, 0, 0.6);
	--gradient-button-export: linear-gradient(135deg, var(--button-main-color) 0%, #3FE780 100%);
	--gradient-button-export-hover: linear-gradient(135deg, #3FE780 0%, var(--button-main-color) 100%);
	--gradient-button-other: linear-gradient(135deg, var(--button-secondary-color) 0%, #5DADE2 100%);
	--gradient-button-other-hover: linear-gradient(135deg, #5DADE2 0%, var(--button-secondary-color) 100%);
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	font-family: 'Inter', sans-serif;
	background-color: var(--primary-bg);
	color: var(--text-light);
	display: flex;
	flex-direction: column;
	min-height: 100vh;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

/* ============================================= */
/* == Header & Footer                         == */
/* ============================================= */
header,
footer {
	padding: 25px 40px;
	border-bottom: 1px solid var(--border-color);
	position: relative;
	z-index: 100;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 20px;
	flex-wrap: wrap;
}

header {
	background: linear-gradient(90deg, var(--header-bg-start) 0%, var(--header-bg-end) 100%);
	box-shadow: var(--box-shadow-heavy);
	padding: 20px 40px;
}

footer {
	background-color: var(--header-bg-end);
	font-size: 15px;
	color: var(--text-muted);
}

.header-left {
	display: flex;
	align-items: center;
}

.header-logo {
	height: 40px;
	margin-right: 15px;
	border-radius: 4px;
	object-fit: contain;
}

header h1 {
	margin: 0;
	font-size: 26px;
	font-weight: 700;
	letter-spacing: 1px;
	text-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
}

.header-nav,
.footer-right {
	display: flex;
	gap: 25px;
}

.header-nav button,
.footer-right button {
	background: none;
	border: none;
	color: var(--text-muted);
	text-decoration: none;
	font-size: 16px;
	cursor: pointer;
	transition: color 0.2s ease;
	outline: none;
}

.footer-right button {
	font-size: 15px;
}

.header-nav button {
	font-weight: 500;
	text-shadow: none;
	position: relative;
	padding: 5px 0;
	transition: color 0.2s ease, text-shadow 0.2s ease;
}

.header-nav button:hover,
.footer-right button:hover {
	color: var(--accent-hover);
}

.header-nav button:hover {
	text-shadow: 0 0 12px var(--accent-hover);
}

.header-nav button::after {
	content: '';
	position: absolute;
	left: 0;
	bottom: -8px;
	width: 0;
	height: 3px;
	background-color: var(--accent-color);
	transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
	border-radius: 2px;
}

.header-nav button:hover::after {
	width: 100%;
}

.header-nav button:focus-visible,
.footer-right button:focus-visible {
	outline: 2px solid var(--accent-hover);
	outline-offset: 4px;
	border-radius: 4px;
}

/* ============================================= */
/* == Main Content & Container                == */
/* ============================================= */
.main {
	flex: 1;
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 40px 20px;
	position: relative;
}

.container {
	background-color: var(--secondary-bg);
	padding: 45px 35px;
	border-radius: var(--border-radius-lg);
	width: 100%;
	max-width: 520px;
	box-shadow: var(--box-shadow-heavy);
	border: 1px solid var(--border-color);
	position: relative;
	overflow: hidden;
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
}

.container::before {
	content: '';
	position: absolute;
	top: -50%;
	left: -50%;
	width: 200%;
	height: 200%;
	background: radial-gradient(circle at center, rgba(97, 218, 251, 0.1) 0%, transparent 70%);
	animation: rotateBackground 30s linear infinite;
	z-index: -1;
	opacity: 0.6;
}

@keyframes rotateBackground {
	from {
		transform: rotate(0deg);
	}
	to {
		transform: rotate(360deg);
	}
}

h2 {
	text-align: center;
	margin-bottom: 40px;
	color: var(--text-light);
	font-size: 32px;
	font-weight: 700;
	letter-spacing: 1.5px;
	position: relative;
	padding-bottom: 18px;
}

h2::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 80px;
	height: 4px;
	background-color: var(--accent-color);
	border-radius: 2px;
	box-shadow: 0 0 10px var(--accent-color), 0 0 20px rgba(97, 218, 251, 0.3);
}

/* ============================================= */
/* == Form Inputs & Buttons                   == */
/* ============================================= */
.date-input-group {
	display: flex;
	flex-direction: column;
	gap: 15px;
	margin-bottom: 30px;
}

.date-input-group label {
	font-size: 15px;
	font-weight: 500;
	margin-bottom: 5px;
	display: block;
}

.date-input-group input[type="text"],
.date-input-group select {
	width: 100%;
	padding: 12px 15px;
	border: 1px solid var(--border-color);
	border-radius: var(--border-radius-md);
	background-color: #0E1218;
	color: var(--text-light);
	font-family: 'Inter', sans-serif;
	font-size: 16px;
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
	-webkit-appearance: none;
	appearance: none;
}

.date-input-group input[type="text"]:focus,
.date-input-group select:focus {
	border-color: var(--accent-color);
	box-shadow: 0 0 0 3px rgba(97, 218, 251, 0.2);
	outline: none;
}

.date-input-group select {
	cursor: pointer;
	background-image: url('data:image/svg+xml;utf8,<svg fill="%23E0E6EB" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
	background-repeat: no-repeat;
	background-position: right 10px center;
	background-size: 20px;
}

.date-input-group select:hover {
	border-color: rgba(97, 218, 251, 0.5);
}

.date-input-group select option {
	background-color: var(--secondary-bg);
	color: var(--text-light);
	padding: 8px 15px;
}

.button-group {
	display: flex;
	flex-direction: column;
	gap: 22px;
	margin-top: 20px;
}

.btn {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 18px 25px;
	color: #ffffff;
	border: none;
	border-radius: var(--border-radius-md);
	font-size: 18px;
	font-weight: 600;
	text-decoration: none;
	transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
	cursor: pointer;
	position: relative;
	overflow: hidden;
	box-shadow: var(--box-shadow-light);
	letter-spacing: 0.6px;
	outline: none;
}

.btn i {
	margin-right: 15px;
	font-size: 22px;
	transition: transform 0.35s ease;
}

.btn:hover i {
	transform: translateX(-5px) scale(1.1);
}

.btn:active {
	transform: translateY(1px);
	box-shadow: 0 3px 12px rgba(0, 0, 0, 0.3);
}

.btn:focus-visible {
	outline: 3px solid var(--accent-hover);
	outline-offset: 5px;
}

/* Specific Button Gradients */
#exportFMEBtn,
#showOwsCreationModalBtn,
#showOwsUtilizationModalBtn,
#confirmExportOwsCreationBtn,
#confirmExportOwsUtilizationBtn,
#showFileListBtn {
	background: var(--gradient-button-export);
}

#exportFMEBtn:hover,
#showOwsCreationModalBtn:hover,
#showOwsUtilizationModalBtn:hover,
#confirmExportOwsCreationBtn:hover,
#confirmExportOwsUtilizationBtn:hover,
#showFileListBtn:hover {
	background: var(--gradient-button-export-hover);
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px var(--button-main-color);
}

.other-btn {
	background: var(--gradient-button-other);
}

.other-btn:hover {
	background: var(--gradient-button-other-hover);
	transform: translateY(-5px);
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px var(--button-secondary-color);
}


/* ============================================= */
/* == Modal & Loading Overlay                 == */
/* ============================================= */
.modal-overlay,
.loading-overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay {
	background-color: rgba(0, 0, 0, 0.8);
	z-index: 2000;
}

.loading-overlay {
	background-color: rgba(0, 0, 0, 0.92);
	z-index: 9999;
}

.modal-overlay.active,
.loading-overlay.active {
	opacity: 1;
	visibility: visible;
}

.modal-content,
.loading-content {
	background-color: var(--secondary-bg);
	border-radius: var(--border-radius-lg);
	box-shadow: var(--box-shadow-heavy);
	border: 1px solid var(--border-color);
	opacity: 0;
	transform: translateY(30px);
	transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s ease;
}

.modal-content {
	padding: 30px;
	width: 90%;
	max-width: 450px;
}

.loading-content {
	padding: 40px 50px;
	text-align: center;
}

.modal-overlay.active .modal-content,
.loading-overlay.active .loading-content {
	transform: translateY(0);
	opacity: 1;
}

.modal-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 25px;
}

.modal-header h3 {
	font-size: 24px;
	font-weight: 600;
}

.modal-close-btn {
	background: none;
	border: none;
	color: var(--text-muted);
	font-size: 28px;
	cursor: pointer;
	transition: color 0.2s ease;
}

.modal-close-btn:hover {
	color: var(--accent-color);
}

.modal-body .date-input-group {
	margin-bottom: 25px;
}

.modal-footer {
	display: flex;
	justify-content: flex-end;
	gap: 15px;
	margin-top: 20px;
}

.modal-footer .btn {
	padding: 12px 25px;
	font-size: 16px;
	box-shadow: none;
}

.modal-footer .btn:hover {
	transform: translateY(-2px);
	box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.spinner {
	border: 6px solid rgba(255, 255, 255, 0.2);
	border-top: 6px solid var(--accent-color);
	border-radius: 50%;
	width: 60px;
	height: 60px;
	animation: spin 0.7s linear infinite;
	display: inline-block;
	margin-bottom: 30px;
}

.loading-text {
	font-size: 22px;
	font-weight: 600;
	margin-bottom: 12px;
}

.sub-loading-text {
	font-size: 16px;
	color: var(--text-muted);
}

/* ============================================= */
/* == File List Container (in Modal)          == */
/* ============================================= */
#fileListContainer ul {
	list-style: none;
	padding: 0;
	margin: 0;
	max-height: 40vh;
	overflow-y: auto;
	text-align: left;
}

#fileListContainer li {
	margin-bottom: 10px;
	border-bottom: 1px solid var(--border-color);
	padding-bottom: 10px;
}

#fileListContainer li:last-child {
	border-bottom: none;
}

#fileListContainer a {
	color: var(--text-light);
	text-decoration: none;
	display: flex;
	align-items: center;
	padding: 8px 5px;
	border-radius: var(--border-radius-md);
	transition: background-color 0.2s ease, color 0.2s ease;
}

#fileListContainer a:hover {
	background-color: rgba(97, 218, 251, 0.1);
	color: var(--accent-hover);
}

#fileListContainer a i {
	margin-right: 15px;
	color: var(--accent-color);
}

#fileListContainer .spinner {
	margin: 20px auto;
}

#fileListContainer p {
	text-align: center;
}


/* ============================================= */
/* == Responsive Design                       == */
/* ============================================= */
@media (max-width: 768px) {
	header,
	footer {
		flex-direction: column;
		text-align: center;
		padding: 15px 20px;
	}

	.header-left,
	.header-nav,
	.footer-right {
		flex-direction: column;
		gap: 10px;
	}

	.header-left {
		margin-bottom: 15px;
	}

	.header-logo {
		margin-right: 0;
		margin-bottom: 10px;
	}

	header h1 {
		font-size: 22px;
	}

	.main {
		padding: 30px 15px;
	}

	.container {
		padding: 30px 20px;
	}

	h2 {
		font-size: 26px;
	}

	.btn {
		font-size: 16px;
		padding: 15px 20px;
	}

	.btn i {
		font-size: 18px;
	}

	.loading-content {
		padding: 30px 35px;
	}

	.loading-text {
		font-size: 18px;
	}

	.sub-loading-text {
		font-size: 14px;
	}
	
	.footer-right {
		margin-top: 15px;
	}

	.modal-content {
		padding: 20px;
	}

	.modal-header h3 {
		font-size: 20px;
	}

	.modal-footer .btn {
		padding: 10px 20px;
	}
}