@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=Manrope:wght@400;500;600;700;800&display=swap");
@import "tailwindcss";
@plugin "@tailwindcss/typography";

@theme {
  --font-sans: "Manrope", ui-sans-serif, system-ui, sans-serif;
}

:root {
  --sea-ink: #173a40;
  --sea-ink-soft: #416166;
  --lagoon: #4fb8b2;
  --lagoon-deep: #328f97;
  --palm: #2f6a4a;
  --sand: #e7f0e8;
  --foam: #f3faf5;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --line: rgba(23, 58, 64, 0.14);
  --inset-glint: rgba(255, 255, 255, 0.82);
  --kicker: rgba(47, 106, 74, 0.9);
  --bg-base: #e7f3ec;
  --header-bg: rgba(251, 255, 248, 0.84);
  --chip-bg: rgba(255, 255, 255, 0.8);
  --chip-line: rgba(47, 106, 74, 0.18);
  --link-bg-hover: rgba(255, 255, 255, 0.9);
  --hero-a: rgba(79, 184, 178, 0.36);
  --hero-b: rgba(47, 106, 74, 0.2);
}

:root[data-theme="dark"] {
  --sea-ink: #d7ece8;
  --sea-ink-soft: #afcdc8;
  --lagoon: #60d7cf;
  --lagoon-deep: #8de5db;
  --palm: #6ec89a;
  --sand: #0f1a1e;
  --foam: #101d22;
  --surface: rgba(16, 30, 34, 0.8);
  --surface-strong: rgba(15, 27, 31, 0.92);
  --line: rgba(141, 229, 219, 0.18);
  --inset-glint: rgba(194, 247, 238, 0.14);
  --kicker: #b8efe5;
  --bg-base: #0a1418;
  --header-bg: rgba(10, 20, 24, 0.8);
  --chip-bg: rgba(13, 28, 32, 0.9);
  --chip-line: rgba(141, 229, 219, 0.24);
  --link-bg-hover: rgba(24, 44, 49, 0.8);
  --hero-a: rgba(96, 215, 207, 0.18);
  --hero-b: rgba(110, 200, 154, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sea-ink: #d7ece8;
    --sea-ink-soft: #afcdc8;
    --lagoon: #60d7cf;
    --lagoon-deep: #8de5db;
    --palm: #6ec89a;
    --sand: #0f1a1e;
    --foam: #101d22;
    --surface: rgba(16, 30, 34, 0.8);
    --surface-strong: rgba(15, 27, 31, 0.92);
    --line: rgba(141, 229, 219, 0.18);
    --inset-glint: rgba(194, 247, 238, 0.14);
    --kicker: #b8efe5;
    --bg-base: #0a1418;
    --header-bg: rgba(10, 20, 24, 0.8);
    --chip-bg: rgba(13, 28, 32, 0.9);
    --chip-line: rgba(141, 229, 219, 0.24);
    --link-bg-hover: rgba(24, 44, 49, 0.8);
    --hero-a: rgba(96, 215, 207, 0.18);
    --hero-b: rgba(110, 200, 154, 0.12);
  }
}

/* ---------------------------------------------------------------------------
   App theme — the Gmail-style mail client (mailbox routes) uses this flat,
   dense surface palette instead of the marketing "island/lagoon" look. Same
   three-layer dark-mode mechanism as above (explicit data-theme + system
   fallback); only the values differ. Marketing tokens stay untouched.
--------------------------------------------------------------------------- */
:root {
  --app-bg: #f6f8fc;
  --app-surface: #ffffff;
  --app-surface-2: #f1f3f4;
  --app-hover: rgba(32, 33, 36, 0.06);
  --app-selected: color-mix(in oklab, var(--lagoon) 18%, white);
  --app-selected-strong: color-mix(in oklab, var(--lagoon) 32%, white);
  --app-selected-text: var(--sea-ink);
  --app-border: #e4e7ec;
  --app-border-strong: #d5d9df;
  --app-text: #202124;
  --app-text-soft: #5f6368;
  --app-text-faint: #80868b;
  --app-accent: #1f6b71;
  --app-accent-hover: #17565b;
  --app-on-accent: #ffffff;
  --app-danger: #d93025;
  --app-shadow: 0 1px 3px rgba(60, 64, 67, 0.15), 0 4px 8px rgba(60, 64, 67, 0.08);

  /* Liquid Glass material — functional layer only (sidebar, toolbars, compose
     chrome, floating buttons). Never applied to content-layer surfaces
     (thread rows, message cards) per Apple HIG. */
  --glass-bg: rgba(255, 255, 255, 0.46);
  --glass-bg-strong: rgba(255, 255, 255, 0.68);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-highlight: rgba(255, 255, 255, 0.95);
  --glass-shadow: 0 12px 40px rgba(23, 58, 64, 0.22), 0 2px 8px rgba(23, 58, 64, 0.1);
  --glass-tint-accent: rgba(79, 184, 178, 0.28);

  /* Stronger-than-marketing aurora, specifically for behind the glass shell —
     glass needs real color/contrast to blur and refract, or it just reads as
     a flat translucent gray. */
  --app-aurora-a: rgba(79, 184, 178, 0.6);
  --app-aurora-b: rgba(47, 106, 74, 0.38);
  --app-aurora-c: rgba(246, 130, 31, 0.22);
}

:root[data-theme="dark"] {
  --app-bg: #131314;
  --app-surface: #1e1f20;
  --app-surface-2: #2d2e30;
  --app-hover: rgba(227, 227, 227, 0.08);
  --app-selected: color-mix(in oklab, var(--lagoon-deep) 28%, black);
  --app-selected-strong: color-mix(in oklab, var(--lagoon-deep) 42%, black);
  --app-selected-text: var(--kicker);
  --app-border: #333438;
  --app-border-strong: #444649;
  --app-text: #e3e3e3;
  --app-text-soft: #9aa0a6;
  --app-text-faint: #7a7d81;
  --app-accent: #60d7cf;
  --app-accent-hover: #7fe2da;
  --app-on-accent: #062723;
  --app-danger: #f28b82;
  --app-shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.4);

  --glass-bg: rgba(18, 32, 36, 0.46);
  --glass-bg-strong: rgba(14, 26, 29, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-highlight: rgba(255, 255, 255, 0.16);
  --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.55), 0 2px 8px rgba(0, 0, 0, 0.35);
  --glass-tint-accent: rgba(96, 215, 207, 0.22);

  --app-aurora-a: rgba(96, 215, 207, 0.4);
  --app-aurora-b: rgba(110, 200, 154, 0.28);
  --app-aurora-c: rgba(246, 130, 31, 0.16);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --app-bg: #131314;
    --app-surface: #1e1f20;
    --app-surface-2: #2d2e30;
    --app-hover: rgba(227, 227, 227, 0.08);
    --app-selected: color-mix(in oklab, var(--lagoon-deep) 28%, black);
    --app-selected-strong: color-mix(in oklab, var(--lagoon-deep) 42%, black);
    --app-selected-text: var(--kicker);
    --app-border: #333438;
    --app-border-strong: #444649;
    --app-text: #e3e3e3;
    --app-text-soft: #9aa0a6;
    --app-text-faint: #7a7d81;
    --app-accent: #60d7cf;
    --app-accent-hover: #7fe2da;
    --app-on-accent: #062723;
    --app-danger: #f28b82;
    --app-shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.4);

    --glass-bg: rgba(18, 32, 36, 0.46);
    --glass-bg-strong: rgba(14, 26, 29, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.16);
    --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.55), 0 2px 8px rgba(0, 0, 0, 0.35);
    --glass-tint-accent: rgba(96, 215, 207, 0.22);

    --app-aurora-a: rgba(96, 215, 207, 0.4);
    --app-aurora-b: rgba(110, 200, 154, 0.28);
    --app-aurora-c: rgba(246, 130, 31, 0.16);
  }
}

* {
  box-sizing: border-box;
}

/* The mail client keeps a faint version of the marketing aurora behind it so
   the glass functional layer (sidebar, floating toolbar, compose window) has
   something to blur and refract. Content-layer surfaces (thread list, message
   cards) stay opaque on top of it — see .glass below for the rule on where
   translucency is and isn't allowed. */
.app-surface-root {
  /* A flat or corner-only background gives backdrop-filter almost nothing to
     blur, so the glass panels just look like plain translucent gray — this
     needs to be an actual colored, varied surface across the whole viewport,
     not a subtle marketing-style vignette. */
  position: relative;
  background:
    radial-gradient(900px 640px at 10% 4%, var(--app-aurora-a), transparent 70%),
    radial-gradient(820px 640px at 90% 92%, var(--app-aurora-b), transparent 70%),
    radial-gradient(700px 560px at 60% 30%, var(--app-aurora-c), transparent 72%),
    linear-gradient(
      135deg,
      color-mix(in oklab, var(--lagoon) 24%, var(--app-bg)) 0%,
      color-mix(in oklab, var(--palm) 16%, var(--app-bg)) 50%,
      color-mix(in oklab, var(--lagoon-deep) 20%, var(--app-bg)) 100%
    );
  color: var(--app-text);
}

/* The "liquid" in Liquid Glass: two soft color blobs that drift very slowly
   behind the glass panels, so the blur/saturation the panels pick up shifts
   gently over time instead of sitting static. Transform + opacity only (GPU
   compositable), sunk behind normal content via z-index on a positioned
   parent, off by default under reduced motion. */
.app-surface-root::before,
.app-surface-root::after {
  content: "";
  position: absolute;
  z-index: -1;
  border-radius: 999px;
  filter: blur(90px);
  pointer-events: none;
}

.app-surface-root::before {
  top: -15%;
  left: -8%;
  width: 46vw;
  height: 46vw;
  background: var(--app-aurora-a);
  animation: aurora-drift-a 46s ease-in-out infinite alternate;
}

.app-surface-root::after {
  bottom: -20%;
  right: -8%;
  width: 42vw;
  height: 42vw;
  background: var(--app-aurora-b);
  animation: aurora-drift-b 54s ease-in-out infinite alternate;
}

@keyframes aurora-drift-a {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(7vw, 9vh) scale(1.12);
  }
}

@keyframes aurora-drift-b {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(-6vw, -7vh) scale(1.1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-surface-root::before,
  .app-surface-root::after {
    animation: none;
  }
}

/* Liquid Glass — the translucent functional-layer material. Regular variant:
   blurs and saturates whatever scrolls behind it so nav/toolbar/compose
   controls stay legible over the aurora. Do not apply to content-layer
   elements (thread rows, message bodies, cards). Note: blur only reads as
   "glass" when there's something colorful/moving behind it to distort — a
   flat background makes this look like a plain translucent panel. */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
}

/* Border is applied per-element via Tailwind (border-[var(--glass-border)])
   since sidebar/toolbar/modal each need a different subset of edges. */

/* Same material, higher opacity — for text-dense glass surfaces (compose
   window) that need more contrast than the sidebar/toolbar. Use instead of
   .glass, not alongside it. */
.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
}

/* Thinner variant for glass sitting on top of an already-opaque content card
   (e.g. a sticky in-thread toolbar) rather than over the open aurora. */
.glass-thin {
  background: color-mix(in oklab, var(--app-surface) 85%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
}

@media (prefers-reduced-transparency: reduce) {
  .glass,
  .glass-strong,
  .glass-thin {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--app-surface);
  }
}

/* Slim, theme-aware scrollbars for the dense list/reading panes. */
.app-scroll {
  scrollbar-width: thin;
  scrollbar-color: var(--app-border-strong) transparent;
}
.app-scroll::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
.app-scroll::-webkit-scrollbar-thumb {
  background-color: var(--app-border-strong);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: content-box;
}
.app-scroll::-webkit-scrollbar-thumb:hover {
  background-color: var(--app-text-faint);
}

html,
body,
#app {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--sea-ink);
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  background:
    radial-gradient(1100px 620px at -8% -10%, var(--hero-a), transparent 58%),
    radial-gradient(1050px 620px at 112% -12%, var(--hero-b), transparent 62%),
    radial-gradient(720px 380px at 50% 115%, rgba(79, 184, 178, 0.1), transparent 68%),
    linear-gradient(180deg, color-mix(in oklab, var(--sand) 68%, white) 0%, var(--foam) 44%, var(--bg-base) 100%);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.28;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.8), transparent 34%),
    radial-gradient(circle at 78% 26%, rgba(79, 184, 178, 0.2), transparent 42%),
    radial-gradient(circle at 42% 82%, rgba(47, 106, 74, 0.14), transparent 36%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 78%);
}

a {
  color: var(--lagoon-deep);
  text-decoration-color: rgba(50, 143, 151, 0.4);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: #246f76;
}

code {
  font-size: 0.9em;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--surface-strong) 82%, white 18%);
  border-radius: 7px;
  padding: 2px 7px;
}

pre code {
  border: 0;
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

.page-wrap {
  width: min(1080px, calc(100% - 2rem));
  margin-inline: auto;
}

.display-title {
  font-family: "Fraunces", Georgia, serif;
}

.island-shell {
  border: 1px solid var(--line);
  background: linear-gradient(165deg, var(--surface-strong), var(--surface));
  box-shadow:
    0 1px 0 var(--inset-glint) inset,
    0 22px 44px rgba(30, 90, 72, 0.1),
    0 6px 18px rgba(23, 58, 64, 0.08);
  backdrop-filter: blur(4px);
}

button,
.island-shell,
a {
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease,
    transform 180ms ease;
}

.island-kicker {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  font-size: 0.69rem;
  color: var(--kicker);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--sea-ink-soft);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--lagoon), #7ed3bf);
  transition: transform 170ms ease;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--sea-ink);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

@media (max-width: 640px) {
  .nav-link::after {
    bottom: -4px;
  }
}

.rise-in {
  animation: rise-in 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}