/*
 * Mavi Derinlik – ortak stiller (her sayfada yüklenir)
 *
 * Yazım: native CSS nesting (LESS benzeri iç içe yazım, derleyici gerekmez).
 * Kırılımlar:
 *   mobil   : 0 – 699px
 *   tablet  : 700px – 1099px
 *   masaüstü: 1100px ve üzeri
 *
 * İçindekiler:
 *   1. Değişkenler
 *   2. Temel
 *   3. Tipografi yardımcıları
 *   4. Butonlar ve linkler
 *   5. Header ve menü
 *   6. Kartlar (ana sayfa ve iç sayfalarda ortak)
 *   7. Footer
 *   8. Yardımcılar (reveal, placeholder, admin notu)
 *   9. Hareket azaltma
 */

/* 1. Değişkenler ------------------------------------------------------ */

:root {
	--color-abyss: #030a16;
	--color-navy: #061a33;
	--color-deep: #0a2a4c;
	--color-ocean: #135a94;
	--color-turquoise: #46d3c8;
	--color-turquoise-soft: rgba(70, 211, 200, 0.14);
	--color-foam: #f2eee5;
	--color-foam-muted: #c3c8cc;
	--color-foam-faint: rgba(242, 238, 229, 0.12);
	--color-line: rgba(242, 238, 229, 0.14);

	--font-display: "Fraunces", Georgia, "Times New Roman", serif;
	--font-body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;

	--text-xs: 0.8125rem;
	--text-sm: 0.9375rem;
	--text-base: 1.0625rem;
	--text-lg: 1.25rem;
	--text-xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
	--text-2xl: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
	--text-3xl: clamp(2.75rem, 1.6rem + 5vw, 6.25rem);

	--space-2xs: 0.25rem;
	--space-xs: 0.5rem;
	--space-sm: 0.875rem;
	--space-md: 1.5rem;
	--space-lg: 2.5rem;
	--space-xl: clamp(3.5rem, 2rem + 5vw, 7rem);
	--space-2xl: clamp(5rem, 3rem + 8vw, 11rem);

	--container-width: 1240px;
	--container-gutter: clamp(1rem, 0.5rem + 3vw, 3rem);
	--reading-width: 720px;

	--radius-sm: 6px;
	--radius-md: 14px;
	--radius-lg: 24px;

	--header-height: 76px;

	--ease-out: cubic-bezier(0.22, 1, 0.36, 1);
	--duration-fast: 180ms;
	--duration-slow: 900ms;

	--shadow-card: 0 24px 60px -30px rgba(0, 0, 0, 0.75);
}

/* 2. Temel ------------------------------------------------------------ */

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
	scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
	margin: 0;
	min-height: 100vh;
	background-color: var(--color-navy);
	color: var(--color-foam);
	font-family: var(--font-body);
	font-size: var(--text-base);
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

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

h1,
h2,
h3,
h4 {
	margin: 0;
	font-family: var(--font-display);
	font-weight: 500;
	line-height: 1.1;
	letter-spacing: -0.01em;
	text-wrap: balance;
}

p {
	margin: 0;
}

a {
	color: var(--color-turquoise);
	text-underline-offset: 0.2em;
	text-decoration-thickness: 1px;
}

ul,
ol {
	margin: 0;
	padding: 0;
}

:focus-visible {
	outline: 3px solid var(--color-turquoise);
	outline-offset: 3px;
	border-radius: 2px;
}

::selection {
	background-color: var(--color-turquoise);
	color: var(--color-abyss);
}

.screen-reader-text {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: fixed;
	top: 0.75rem;
	left: 0.75rem;
	z-index: 1000;
	padding: 0.75rem 1.25rem;
	border-radius: var(--radius-sm);
	background-color: var(--color-foam);
	color: var(--color-abyss);
	font-weight: 700;
	text-decoration: none;
	transform: translateY(-200%);

	&:focus {
		transform: translateY(0);
	}
}

.container {
	width: min(100% - (var(--container-gutter) * 2), var(--container-width));
	margin-inline: auto;
}

/* 3. Tipografi yardımcıları ------------------------------------------- */

.section-eyebrow {
	margin-bottom: var(--space-sm);
	color: var(--color-turquoise);
	font-family: var(--font-body);
	font-size: var(--text-xs);
	font-weight: 700;
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

.section-title {
	font-size: var(--text-2xl);
}

.section-intro {
	max-width: 46ch;
	margin-top: var(--space-sm);
	color: var(--color-foam-muted);
	font-size: var(--text-lg);
	line-height: 1.55;
}

.section-header {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-end;
	justify-content: space-between;
	gap: var(--space-md);
	margin-bottom: var(--space-lg);
}

/* 4. Butonlar ve linkler ---------------------------------------------- */

.button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	min-height: 48px;
	padding: 0.75rem 1.5rem;
	border: 1px solid transparent;
	border-radius: 999px;
	font-family: var(--font-body);
	font-size: var(--text-sm);
	font-weight: 700;
	letter-spacing: 0.02em;
	text-decoration: none;
	cursor: pointer;
	transition:
		background-color var(--duration-fast) ease,
		color var(--duration-fast) ease,
		border-color var(--duration-fast) ease,
		transform var(--duration-fast) ease;

	&:hover {
		transform: translateY(-1px);
	}
}

.button--primary {
	background-color: var(--color-turquoise);
	color: var(--color-abyss);

	&:hover {
		background-color: var(--color-foam);
	}
}

.button--ghost {
	border-color: rgba(242, 238, 229, 0.5);
	background-color: rgba(3, 10, 22, 0.25);
	color: var(--color-foam);
	backdrop-filter: blur(6px);

	&:hover {
		border-color: var(--color-foam);
		background-color: rgba(242, 238, 229, 0.12);
	}
}

.text-link {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding-block: 0.5rem;
	color: var(--color-foam);
	font-weight: 600;
	text-decoration: none;
	border-bottom: 1px solid var(--color-turquoise);

	&::after {
		content: "→";
		color: var(--color-turquoise);
		transition: transform var(--duration-fast) ease;
	}

	&:hover::after {
		transform: translateX(4px);
	}
}

/* 5. Header ve menü --------------------------------------------------- */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background-color: rgba(3, 10, 22, 0.88);
	border-bottom: 1px solid var(--color-line);
	backdrop-filter: blur(12px);
	transition:
		background-color var(--duration-fast) ease,
		border-color var(--duration-fast) ease;

	.admin-bar & {
		top: 32px;

		@media (max-width: 782px) {
			top: 46px;
		}
	}
}

/* Ana sayfada header videonun üzerinde şeffaf başlar, kaydırınca koyulaşır. */
.site-header--overlay {
	position: fixed;
	left: 0;
	right: 0;
	background-color: transparent;
	border-bottom-color: transparent;
	backdrop-filter: none;

	&.is-scrolled {
		background-color: rgba(3, 10, 22, 0.92);
		border-bottom-color: var(--color-line);
		backdrop-filter: blur(12px);
	}
}

/*
 * Menü açıkken blur kapatılır: backdrop-filter, içindeki fixed menüyü
 * header'a hapseder ve menü tam ekran açılamaz.
 */
.site-header.is-menu-open {
	background-color: var(--color-abyss);
	border-bottom-color: var(--color-line);
	backdrop-filter: none;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-md);
	width: min(100% - (var(--container-gutter) * 2), 1440px);
	min-height: var(--header-height);
	margin-inline: auto;
}

.site-brand {
	flex-shrink: 0;

	.custom-logo {
		width: auto;
		max-height: 44px;
	}
}

.site-brand__name {
	color: var(--color-foam);
	font-family: var(--font-display);
	font-size: 1.375rem;
	font-weight: 600;
	letter-spacing: 0.01em;
	text-decoration: none;
}

.menu-toggle {
	display: none;
	align-items: center;
	gap: 0.625rem;
	min-height: 44px;
	padding: 0.5rem 0.875rem;
	border: 1px solid var(--color-line);
	border-radius: 999px;
	background-color: transparent;
	color: var(--color-foam);
	font: inherit;
	font-size: var(--text-sm);
	font-weight: 600;
	cursor: pointer;
}

.menu-toggle__bars {
	position: relative;
	width: 18px;
	height: 2px;
	background-color: currentColor;
	transition: background-color var(--duration-fast) ease;

	&::before,
	&::after {
		content: "";
		position: absolute;
		left: 0;
		width: 100%;
		height: 2px;
		background-color: currentColor;
		transition: transform var(--duration-fast) ease;
	}

	&::before {
		top: -6px;
	}

	&::after {
		top: 6px;
	}

	.menu-toggle[aria-expanded="true"] & {
		background-color: transparent;

		&::before {
			transform: translateY(6px) rotate(45deg);
		}

		&::after {
			transform: translateY(-6px) rotate(-45deg);
		}
	}
}

.primary-nav__list {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.25rem;
	list-style: none;

	& a {
		display: block;
		padding: 0.5rem 0.875rem;
		border-radius: 999px;
		color: var(--color-foam);
		font-size: var(--text-sm);
		font-weight: 600;
		text-decoration: none;
		transition:
			background-color var(--duration-fast) ease,
			color var(--duration-fast) ease;

		&:hover {
			background-color: var(--color-foam-faint);
		}
	}

	.current-menu-item > a,
	.current-menu-ancestor > a,
	& a[aria-current="page"] {
		color: var(--color-turquoise);
	}
}

/* Tablet ve mobil: açılır menü */
@media (max-width: 1099px) {
	.js {
		.menu-toggle {
			display: inline-flex;
		}

		.primary-nav {
			position: fixed;
			top: var(--header-height);
			left: 0;
			right: 0;
			bottom: 0;
			padding: var(--space-lg) var(--container-gutter);
			background-color: var(--color-abyss);
			overflow-y: auto;
			opacity: 0;
			visibility: hidden;
			transform: translateY(-8px);
			transition:
				opacity var(--duration-fast) ease,
				transform var(--duration-fast) ease,
				visibility 0s linear var(--duration-fast);

			&.is-open {
				opacity: 1;
				visibility: visible;
				transform: translateY(0);
				transition:
					opacity var(--duration-fast) ease,
					transform var(--duration-fast) ease;
			}
		}

		.admin-bar .primary-nav {
			top: calc(var(--header-height) + 32px);

			@media (max-width: 782px) {
				top: calc(var(--header-height) + 46px);
			}
		}

		.primary-nav__list {
			flex-direction: column;
			align-items: stretch;
			gap: 0;

			& a {
				padding: 1rem 0;
				border-radius: 0;
				border-bottom: 1px solid var(--color-line);
				font-family: var(--font-display);
				font-size: var(--text-xl);
				font-weight: 500;

				&:hover {
					background-color: transparent;
					color: var(--color-turquoise);
				}
			}
		}
	}

	/* JS kapalıysa menü header altında açık liste olarak görünür. */
	.no-js {
		.site-header__inner {
			flex-wrap: wrap;
			padding-block: var(--space-sm);
		}

		.primary-nav {
			width: 100%;
		}
	}
}

body.is-menu-locked {
	overflow: hidden;
}

/* 6. Kartlar ---------------------------------------------------------- */

.card-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-md);

	@media (min-width: 700px) {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	@media (min-width: 1100px) {
		grid-template-columns: repeat(3, minmax(0, 1fr));
		gap: var(--space-lg) var(--space-md);
	}
}

.species-card,
.post-card,
.region-card {
	position: relative;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	border: 1px solid var(--color-line);
	border-radius: var(--radius-md);
	background-color: rgba(10, 42, 76, 0.45);
	transition:
		border-color var(--duration-fast) ease,
		transform 400ms var(--ease-out);

	&:hover,
	&:focus-within {
		border-color: rgba(70, 211, 200, 0.55);
		transform: translateY(-4px);
	}
}

.species-card__media,
.post-card__media,
.region-card__media {
	position: relative;
	aspect-ratio: 4 / 3;
	overflow: hidden;
	background-color: var(--color-deep);

	@media (max-width: 699px) {
		aspect-ratio: 16 / 10;
	}

	& img {
		width: 100%;
		height: 100%;
		object-fit: cover;
		transition: transform 900ms var(--ease-out);
	}
}

.species-card:hover img,
.post-card:hover img,
.region-card:hover img {
	transform: scale(1.04);
}

.species-card__body,
.post-card__body,
.region-card__body {
	display: flex;
	flex: 1;
	flex-direction: column;
	gap: 0.5rem;
	padding: var(--space-md);
}

.species-card__title,
.post-card__title,
.region-card__title {
	font-size: var(--text-xl);
}

/* Tüm kart tıklanabilir: başlık linkinin alanı kartı kaplar. */
.species-card__link,
.post-card__link,
.region-card__link {
	color: var(--color-foam);
	text-decoration: none;

	&::after {
		content: "";
		position: absolute;
		inset: 0;
		z-index: 1;
	}

	&:focus-visible {
		outline: none;

		&::after {
			outline: 3px solid var(--color-turquoise);
			outline-offset: -3px;
			border-radius: var(--radius-md);
		}
	}
}

.species-card__scientific {
	color: var(--color-turquoise);
	font-size: var(--text-sm);
}

.species-card__excerpt,
.region-card__text {
	color: var(--color-foam-muted);
	font-size: var(--text-sm);
}

.species-card__tags {
	display: flex;
	flex-wrap: wrap;
	gap: 0.375rem;
	margin-top: auto;
	padding-top: 0.5rem;
	list-style: none;

	& li {
		padding: 0.125rem 0.625rem;
		border-radius: 999px;
		background-color: var(--color-turquoise-soft);
		color: var(--color-foam);
		font-size: var(--text-xs);
	}
}

.post-card__eyebrow {
	color: var(--color-turquoise);
	font-size: var(--text-xs);
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.post-card__meta,
.region-card__count {
	margin-top: auto;
	color: var(--color-foam-muted);
	font-size: var(--text-xs);
}

/* 7. Footer ----------------------------------------------------------- */

.site-footer {
	margin-top: var(--space-2xl);
	border-top: 1px solid var(--color-line);
	background-color: var(--color-abyss);
}

.site-footer__inner {
	display: grid;
	gap: var(--space-lg);
	width: min(100% - (var(--container-gutter) * 2), var(--container-width));
	margin-inline: auto;
	padding-block: var(--space-xl) var(--space-lg);

	@media (min-width: 1100px) {
		grid-template-columns: 1fr 2fr;
		align-items: start;
	}
}

.site-footer__name {
	font-family: var(--font-display);
	font-size: var(--text-xl);
}

.site-footer__tagline {
	max-width: 36ch;
	margin-top: 0.5rem;
	color: var(--color-foam-muted);
	font-size: var(--text-sm);
}

.site-footer__list {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem 1.5rem;
	list-style: none;

	@media (min-width: 1100px) {
		justify-content: flex-end;
	}

	& a {
		display: inline-block;
		padding-block: 0.5rem;
		color: var(--color-foam-muted);
		font-size: var(--text-sm);
		text-decoration: none;

		&:hover {
			color: var(--color-foam);
		}
	}
}

.site-footer__bottom {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: var(--space-sm);
	padding-top: var(--space-md);
	border-top: 1px solid var(--color-line);
	color: var(--color-foam-muted);
	font-size: var(--text-xs);

	@media (min-width: 1100px) {
		grid-column: 1 / -1;
	}
}

/* Arka plan videosu (Vimeo veya MP4) -------------------------------- */

/*
 * Video, kapak görselinin üstünde şeffaf başlar; oynamaya başlayınca görünür.
 * Vimeo iframe'i container query ile alanı her oranda kaplayacak şekilde büyütülür.
 */
.bg-video {
	position: absolute;
	inset: 0;
	overflow: hidden;
	container-type: size;
	pointer-events: none;
	opacity: 0;
	transition: opacity 1200ms ease;

	&.is-playing {
		opacity: 1;
	}
}

.bg-video__frame {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 100vw;
	height: 56.25vw;
	min-width: 177.78vh;
	min-height: 100vh;
	border: 0;
	transform: translate(-50%, -50%);

	@supports (width: 1cqw) {
		width: max(100cqw, 177.78cqh);
		height: max(56.25cqw, 100cqh);
		min-width: 0;
		min-height: 0;
	}
}

.bg-video__file {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.video-toggle {
	min-height: 40px;
	padding: 0.5rem 1rem;
	border: 1px solid var(--color-line);
	border-radius: 999px;
	background-color: rgba(3, 10, 22, 0.4);
	color: var(--color-foam);
	font: inherit;
	font-size: var(--text-xs);
	font-weight: 600;
	cursor: pointer;
	backdrop-filter: blur(6px);

	&:hover {
		border-color: var(--color-foam);
	}
}


/* 8. Yardımcılar ------------------------------------------------------ */

/* Görünme animasyonu yalnızca JS çalışıyorsa; JS yoksa içerik doğrudan görünür. */
.js .reveal {
	opacity: 0;
	transform: translateY(24px);
	transition:
		opacity var(--duration-slow) var(--ease-out),
		transform var(--duration-slow) var(--ease-out);

	&.is-visible {
		opacity: 1;
		transform: none;
	}
}

.media-placeholder {
	display: block;
	width: 100%;
	height: 100%;
	min-height: 100%;
	background:
		radial-gradient(120% 80% at 20% 0%, rgba(70, 211, 200, 0.22), transparent 60%),
		radial-gradient(90% 70% at 90% 100%, rgba(19, 90, 148, 0.6), transparent 70%),
		linear-gradient(180deg, var(--color-deep), var(--color-abyss));
}

.admin-hint {
	width: min(100% - (var(--container-gutter) * 2), var(--container-width));
	margin: var(--space-md) auto;
	padding: 0.75rem 1rem;
	border: 1px dashed rgba(255, 196, 87, 0.7);
	border-radius: var(--radius-sm);
	background-color: rgba(255, 196, 87, 0.08);
	color: #ffd58a;
	font-size: var(--text-sm);

	& a {
		margin-left: 0.5rem;
		color: #ffd58a;
		font-weight: 700;
	}
}

.admin-hint--fixed {
	position: fixed;
	right: 1rem;
	bottom: 1rem;
	z-index: 999;
	width: auto;
	max-width: 360px;
	margin: 0;
	background-color: #1d1a10;
}

/* 9. Hareket azaltma -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}

	.js .reveal {
		opacity: 1;
		transform: none;
	}
}