/* ===========================================================================
   YEDİPERA — Components
   Masthead · brandmark · navigation · drawer · buttons · links · scroll cue
   =========================================================================== */

/* ---------------------------------------------------------------------------
   MASTHEAD
   Absent over the hero, then revealed as a sticky bar. Theme follows whichever
   section sits beneath it, so the lockup is always legible.
   --------------------------------------------------------------------------- */

.masthead {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-masthead);
  height: var(--masthead-h);
  color: var(--white);
  transform: translate3d(0, -100%, 0);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    transform var(--dur-slow) var(--ease-out),
    opacity var(--dur-mid) var(--ease-out),
    visibility 0s linear var(--dur-slow),
    background-color var(--dur-slow) var(--ease-in-out),
    color var(--dur-slow) var(--ease-in-out);
}

.masthead.is-visible {
  transform: none;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    transform var(--dur-slow) var(--ease-out),
    opacity var(--dur-mid) var(--ease-out),
    visibility 0s,
    background-color var(--dur-slow) var(--ease-in-out),
    color var(--dur-slow) var(--ease-in-out);
}

.masthead--dark {
  background-color: color-mix(in srgb, var(--navy-ink) 35%, transparent);
  color: var(--white);
}

body:has(.hero--cinematic) .masthead--dark.is-visible {
  background-color: transparent;
  backdrop-filter: none;
}

body:has(.hero--cinematic) .masthead--dark.is-visible.is-scrolled {
  background-color: rgba(7, 22, 40, 0.68);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

body:has(.hero--cinematic) .masthead--dark.is-visible:not(.is-scrolled) .masthead__rule {
  opacity: 0;
  transform: scaleX(0);
}

.masthead--light {
  background-color: color-mix(in srgb, var(--white) 90%, transparent);
  color: var(--navy);
}

@supports (backdrop-filter: blur(1px)) {
  .masthead--dark,
  .masthead--light {
    backdrop-filter: saturate(140%) blur(14px);
  }
}

/* While the drawer is open the bar sits on the navy overlay, so it always
   adopts the light-on-dark treatment regardless of the section beneath. */
.masthead.is-nav-open,
.masthead.is-nav-open.masthead--light {
  background-color: transparent;
  color: var(--white);
  backdrop-filter: none;
}

.masthead.is-nav-open .masthead__rule {
  opacity: 0;
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 3rem);
  height: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Hairline that draws itself in once the bar is revealed. */
.masthead__rule {
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: currentColor;
  opacity: 0.16;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-slow) var(--ease-out) 120ms;
}

.masthead.is-visible .masthead__rule {
  transform: scaleX(1);
}

/* --- Brandmark ----------------------------------------------------------- */

.masthead__brand {
  flex: none;
  display: block;
}

.brandmark {
  position: relative;
  display: block;
  height: clamp(32px, 3.6vw, 46px);
  aspect-ratio: 644 / 168;
}

.brandmark__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: opacity var(--dur-slow) var(--ease-in-out);
}

.masthead--dark .brandmark__img--light,
.masthead--light .brandmark__img--dark,
.masthead.is-nav-open .brandmark__img--light {
  opacity: 1;
}

.masthead--dark .brandmark__img--dark,
.masthead--light .brandmark__img--light,
.masthead.is-nav-open .brandmark__img--dark {
  opacity: 0;
}

/* --- Primary navigation -------------------------------------------------- */

.masthead__nav {
  margin-left: auto;
}

.navlist {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.1vw, 2.25rem);
}

.navlist__link {
  position: relative;
  display: inline-block;
  padding-block: 0.35rem;
  font-size: 0.9375rem;
  font-weight: 400;
  letter-spacing: var(--ls-nav);
  white-space: nowrap;
  color: inherit;
  opacity: 0.74;
  transition: opacity var(--dur-fast) var(--ease-out);
}

.navlist__link::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-mid) var(--ease-out);
}

.navlist__link:hover,
.navlist__link:focus-visible,
.navlist__link.is-current {
  opacity: 1;
}

.navlist__link:hover::after,
.navlist__link:focus-visible::after,
.navlist__link.is-current::after {
  transform: scaleX(1);
}

.masthead__actions {
  flex: none;
  display: flex;
  align-items: center;
  gap: 1rem;
}

@media (max-width: 1180px) {
  .masthead__nav {
    display: none;
  }

  .masthead__actions {
    margin-left: auto;
  }
}

/* --- Burger -------------------------------------------------------------- */

.burger {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  color: inherit;
}

.burger__lines {
  position: relative;
  display: block;
  width: 26px;
  height: 10px;
}

.burger__lines span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-fast);
}

.burger__lines span:first-child {
  top: 0;
}

.burger__lines span:last-child {
  bottom: 0;
  width: 68%;
}

.burger:hover .burger__lines span:last-child {
  width: 100%;
}

.burger[aria-expanded="true"] {
  color: var(--white);
}

.burger[aria-expanded="true"] .burger__lines span:first-child {
  transform: translateY(4.5px) rotate(45deg);
}

.burger[aria-expanded="true"] .burger__lines span:last-child {
  width: 100%;
  transform: translateY(-4.5px) rotate(-45deg);
}

@media (max-width: 1180px) {
  .burger {
    display: grid;
  }
}

/* ---------------------------------------------------------------------------
   MOBILE DRAWER
   --------------------------------------------------------------------------- */

.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: linear-gradient(
    165deg,
    rgba(14, 40, 70, 0.82) 0%,
    rgba(7, 20, 35, 0.88) 60%,
    rgba(4, 13, 24, 0.92) 100%
  );
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-out);
}

.drawer.is-open {
  opacity: 1;
}

.drawer__inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--stack-5);
  height: 100%;
  padding: calc(var(--masthead-h) + clamp(2rem, 8vh, 5rem)) var(--gutter)
    clamp(2rem, 6vh, 4rem);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.drawer__list {
  display: flex;
  flex-direction: column;
}

.drawer__list li {
  border-bottom: 1px solid var(--rule-light-soft);
}

.drawer__list a {
  display: block;
  padding-block: clamp(0.85rem, 2.4vh, 1.35rem);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 6.4vw, 2.25rem);
  font-weight: 250;
  letter-spacing: var(--ls-title);
  color: var(--white);
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: calc(90ms + var(--i, 0) * 55ms);
}

.drawer.is-open .drawer__list a {
  opacity: 1;
  transform: none;
}

.drawer__foot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--stack-3);
}

.drawer__meta {
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-on-dark-faint);
}

/* ---------------------------------------------------------------------------
   BUTTONS
   --------------------------------------------------------------------------- */

.btn {
  --btn-bg: transparent;
  --btn-fg: currentColor;
  --btn-line: currentColor;
  --btn-bg-hover: var(--btn-bg);
  --btn-fg-hover: var(--btn-fg);
  --btn-line-hover: var(--btn-line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.05rem 1.9rem;
  border: 1px solid var(--btn-line);
  border-radius: 999px;
  background-color: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  line-height: 1;
  white-space: nowrap;
  transition:
    background-color var(--dur-mid) var(--ease-out),
    color var(--dur-mid) var(--ease-out),
    border-color var(--dur-mid) var(--ease-out);
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--btn-bg-hover);
  color: var(--btn-fg-hover);
  border-color: var(--btn-line-hover);
}

.btn--sm {
  padding: 0.85rem 1.45rem;
}

.btn--solid {
  --btn-bg: var(--navy);
  --btn-fg: var(--white);
  --btn-line: var(--navy);
  --btn-bg-hover: var(--navy-raised);
  --btn-fg-hover: var(--white);
  --btn-line-hover: var(--navy-raised);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--navy);
  --btn-line: var(--rule-strong);
  --btn-bg-hover: var(--navy);
  --btn-fg-hover: var(--white);
  --btn-line-hover: var(--navy);
}

/* Solid button inside the masthead, inverted per theme. */
.masthead--light .btn--solid {
  --btn-bg: var(--navy);
  --btn-fg: var(--white);
  --btn-line: var(--navy);
  --btn-bg-hover: var(--navy-raised);
  --btn-line-hover: var(--navy-raised);
}

.masthead--dark .btn--solid {
  --btn-bg: var(--white);
  --btn-fg: var(--navy);
  --btn-line: var(--white);
  --btn-bg-hover: var(--stone-100);
  --btn-line-hover: var(--stone-100);
}

.masthead.is-nav-open .btn--solid {
  --btn-bg: var(--white);
  --btn-fg: var(--navy);
  --btn-line: var(--white);
  --btn-bg-hover: var(--stone-100);
  --btn-line-hover: var(--stone-100);
}

.btn--light {
  --btn-bg: var(--white);
  --btn-fg: var(--navy);
  --btn-line: var(--white);
  --btn-bg-hover: var(--stone-100);
  --btn-line-hover: var(--stone-100);
}

.btn--outline-light {
  --btn-fg: var(--white);
  --btn-line: var(--rule-light-strong);
  --btn-bg-hover: var(--white);
  --btn-fg-hover: var(--navy);
  --btn-line-hover: var(--white);
}

/* ---------------------------------------------------------------------------
   TEXT LINKS
   --------------------------------------------------------------------------- */

.textlink,
.readmore {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-strong);
}

.textlink svg,
.readmore svg {
  width: 28px;
  height: 12px;
  flex: none;
  transition: transform var(--dur-mid) var(--ease-out);
}

.textlink--light {
  color: var(--white);
}

.textlink:hover svg,
.textlink:focus-visible svg,
.post__link:hover .readmore svg,
.post__link:focus-visible .readmore svg {
  transform: translateX(7px);
}

/* ---------------------------------------------------------------------------
   SCROLL CUE
   --------------------------------------------------------------------------- */

.scrollcue {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  color: rgba(255, 255, 255, 0.72);
  transition: color var(--dur-mid) var(--ease-out);
}

.scrollcue:hover,
.scrollcue:focus-visible {
  color: var(--white);
}

.scrollcue__label {
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.scrollcue__track {
  position: relative;
  display: block;
  width: 1px;
  height: clamp(48px, 7vh, 76px);
  background: rgba(255, 255, 255, 0.2);
  overflow: hidden;
}

.scrollcue__beam {
  position: absolute;
  inset: 0 0 auto 0;
  height: 45%;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.95) 55%,
    rgba(255, 255, 255, 0) 100%
  );
  animation: cue-descend 2.6s var(--ease-in-out) infinite;
}

@keyframes cue-descend {
  0% {
    transform: translateY(-100%);
  }
  60%,
  100% {
    transform: translateY(240%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .scrollcue__beam {
    animation: none;
    inset: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.5);
  }
}

/* ---------------------------------------------------------------------------
   GLASS SYSTEM
   Frosted surfaces shared by panels, forms, dialogs and toasts.
   --------------------------------------------------------------------------- */

.glass {
  position: relative;
  border: 1px solid var(--glass-light-border);
  border-radius: var(--glass-radius);
  background: var(--glass-light-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-light-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  color: var(--text-body);
}

.glass--dark {
  border-color: var(--glass-dark-border);
  background: var(--glass-dark-bg);
  box-shadow: var(--glass-dark-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  color: var(--text-on-dark);
}

/* Specular highlight that sells the "thick glass" read. */
.glass--sheen::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(255, 255, 255, 0.45) 0%, transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 45%);
}

.glass--dark.glass--sheen::before {
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(255, 255, 255, 0.14) 0%, transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 45%);
}

.btn--glass {
  --btn-bg: rgba(11, 28, 51, 0.06);
  --btn-fg: var(--navy);
  --btn-line: rgba(11, 28, 51, 0.22);
  --btn-bg-hover: var(--navy);
  --btn-fg-hover: var(--white);
  --btn-line-hover: var(--navy);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.btn--glass-dark {
  --btn-bg: rgba(255, 255, 255, 0.12);
  --btn-fg: var(--white);
  --btn-line: rgba(255, 255, 255, 0.34);
  --btn-bg-hover: rgba(255, 255, 255, 0.22);
  --btn-fg-hover: var(--white);
  --btn-line-hover: rgba(255, 255, 255, 0.6);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.glass-input {
  width: 100%;
  min-height: 3rem;
  padding: 0.9rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--text-strong);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.glass-input::placeholder {
  color: var(--stone-500);
}

.glass-input:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 65%, white);
  background: rgba(255, 255, 255, 0.78);
}

.glass-input--on-dark {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.glass-input--on-dark::placeholder {
  color: rgba(255, 255, 255, 0.48);
}

.glass-input--on-dark:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 70%, white);
  background: rgba(255, 255, 255, 0.16);
}

.glass-input[aria-invalid="true"] {
  border-color: #c2606b;
}

/* ---------------------------------------------------------------------------
   NEWSLETTER MODAL — glass dialog, opened once per visitor
   --------------------------------------------------------------------------- */

.nlmodal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: clamp(1rem, 4vw, 2.5rem);
}

.nlmodal[hidden] {
  display: none;
}

.nlmodal__backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: rgba(4, 13, 24, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
  animation: nlmodal-fade var(--dur-mid) var(--ease-out) both;
}

.nlmodal__panel {
  position: relative;
  z-index: 1;
  width: min(34rem, 100%);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--glass-radius-lg);
  background: linear-gradient(
    155deg,
    rgba(20, 52, 90, 0.78) 0%,
    rgba(10, 30, 56, 0.74) 55%,
    rgba(6, 20, 38, 0.8) 100%
  );
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  box-shadow: 0 32px 80px rgba(4, 13, 24, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  color: var(--white);
  overflow: hidden;
  animation: nlmodal-rise var(--dur-slow) var(--ease-out) both;
}

.nlmodal__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(110% 80% at 0% 0%, rgba(255, 255, 255, 0.16) 0%, transparent 55%);
}

.nlmodal__close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.78);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.nlmodal__close:hover,
.nlmodal__close:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
}

.nlmodal__eyebrow {
  position: relative;
  margin: 0 0 0.9rem;
  font-family: var(--font-body);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 80%, white);
}

.nlmodal__title {
  position: relative;
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--white);
}

.nlmodal__text {
  position: relative;
  margin: 0 0 1.35rem;
  max-width: 30rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-on-dark-muted);
}

/* ---------------------------------------------------------------------------
   NEWSLETTER FORM — shared by the inline section and the modal
   --------------------------------------------------------------------------- */

.nlform {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.nlform__row {
  display: flex;
  gap: 0.6rem;
}

.nlform__row .glass-input {
  flex: 1;
  min-width: 0;
}

.nlform__row .btn {
  flex: none;
}

.nlform__note {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--text-quiet);
}

.nlform__note a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.nlform--on-dark .nlform__note {
  color: var(--text-on-dark-faint);
}

.nlform__status {
  margin: 0;
  min-height: 1.1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: color-mix(in srgb, var(--accent) 85%, var(--navy));
}

.nlform--on-dark .nlform__status {
  color: color-mix(in srgb, var(--accent) 80%, white);
}

.nlform__status[data-state="error"] {
  color: #c2606b;
}

.nlform--on-dark .nlform__status[data-state="error"] {
  color: #ffb3bb;
}

@media (max-width: 520px) {
  .nlform__row {
    flex-direction: column;
  }

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

/* ---------------------------------------------------------------------------
   GLASS TOAST
   --------------------------------------------------------------------------- */

.glass-toast {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: min(22rem, calc(100vw - 2rem));
  padding: 0.95rem 1.15rem;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: var(--glass-radius);
  background: rgba(10, 32, 58, 0.72);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-dark-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.16);
  color: var(--white);
  font-size: 0.85rem;
  line-height: 1.5;
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out);
}

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

.glass-toast__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 80%, white);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 700;
}

@keyframes nlmodal-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes nlmodal-rise {
  from {
    opacity: 0;
    transform: translate3d(0, 22px, 0) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nlmodal__backdrop,
  .nlmodal__panel {
    animation: none;
  }

  .glass-toast {
    transition: none;
  }
}

body.is-modal-open {
  overflow: hidden;
}