* {
  box-sizing: border-box;
}

:root {
  --ink: #f4fbff;
  --muted: rgba(244, 251, 255, 0.76);
  --panel-border: rgba(244, 251, 255, 0.72);
  --accent: #31e27a;
  --hero-base: #1f2243;
}

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

body {
  margin: 0;
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, Helvetica, sans-serif;
  background: var(--hero-base);
}

.page-shell {
  min-height: 100vh;
}

.proposal-page {
  width: 100%;
  min-height: 100vh;
  display: block;
  overflow-x: hidden;
  background: var(--hero-base);
}

.hero-panel {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 18% 78%, rgba(59, 66, 122, 0.82), transparent 31%),
    radial-gradient(circle at 76% 18%, rgba(86, 94, 162, 0.66), transparent 28%),
    radial-gradient(circle at 58% 58%, rgba(31, 34, 67, 0.92), transparent 34%),
    linear-gradient(130deg, #151735 0%, #1f2243 38%, #2a2e5c 68%, #171936 100%);
  background-size: 190% 190%;
  animation: heroGradientMove 14s ease-in-out infinite;
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.055), transparent 31%),
    radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.09), transparent 22%);
  background-size: 170% 170%;
  animation: heroSheenMove 18s ease-in-out infinite reverse;
}

.hero-panel {
  padding: clamp(84px, 11vh, 128px) clamp(24px, 8vw, 120px);
}

.browser-controls {
  position: absolute;
  top: clamp(18px, 4vh, 42px);
  right: clamp(22px, 6vw, 96px);
  width: clamp(76px, 12vw, 150px);
  height: clamp(18px, 2.8vw, 30px);
  display: flex;
  align-items: center;
}

.dot,
.pill {
  display: block;
  height: clamp(16px, 2.5vw, 28px);
  border: 1.5px solid var(--panel-border);
  background: transparent;
}

.dot {
  width: clamp(16px, 2.5vw, 28px);
  margin-right: -1.5px;
  border-radius: 50%;
}

.dot.active {
  background: var(--accent);
}

.pill {
  width: clamp(48px, 7.5vw, 94px);
  border-radius: 999px;
}

.panel-rule {
  position: absolute;
  top: clamp(68px, 8vh, 96px);
  left: clamp(24px, 8vw, 120px);
  height: 1px;
  width: calc(100% - clamp(48px, 16vw, 240px));
  margin: 0;
  background: rgba(244, 251, 255, 0.46);
}

.hero-copy {
  width: min(1120px, 100%);
  margin-top: clamp(18px, 2vh, 28px);
  text-align: left;
}

h1 {
  margin: 0;
  max-width: 1040px;
  color: var(--ink);
  font-size: clamp(54px, 7.6vw, 118px);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0;
}

.intro-line {
  max-width: 820px;
  margin: clamp(10px, 2vh, 24px) 0 0;
  color: var(--muted);
  font-size: clamp(20px, 2.2vw, 34px);
  font-weight: 400;
  line-height: 1.25;
}

.concept-gallery-page,
.mockup-gallery-page {
  width: 100%;
  position: relative;
  padding: clamp(54px, 7vw, 96px) clamp(18px, 5vw, 72px);
  background:
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.72), transparent 24%),
    linear-gradient(180deg, #f8f5ed 0%, #f2eee5 100%);
  color: #1f2243;
}

.concept-gallery-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.mockup-gallery-page {
  border-top: 1px solid rgba(31, 34, 67, 0.12);
}

.section-inner {
  width: min(1420px, 100%);
  margin: 0 auto;
}

.section-label {
  margin: 0;
  color: rgba(31, 34, 67, 0.58);
  font-size: clamp(13px, 1.1vw, 16px);
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.concept-grid {
  margin-top: clamp(26px, 4vw, 52px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 34px);
}

.concept-card {
  margin: 0;
  min-width: 0;
  display: grid;
  grid-template-rows: minmax(300px, 1fr) auto;
  gap: clamp(16px, 2vw, 24px);
}

.concept-card figcaption {
  color: rgba(31, 34, 67, 0.7);
  font-size: clamp(13px, 1vw, 15px);
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.concept-card .concept-logo {
  display: grid;
  place-self: center;
}

.concept-logo {
  display: block;
  width: 100%;
  max-height: min(58vh, 520px);
  object-fit: contain;
}

.mockup-grid {
  margin-top: clamp(26px, 4vw, 52px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
}

.mockup-grid img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  box-shadow: 0 24px 50px rgba(31, 34, 67, 0.16);
}

@keyframes heroGradientMove {
  0% {
    background-position: 0% 48%;
  }

  50% {
    background-position: 100% 54%;
  }

  100% {
    background-position: 0% 48%;
  }
}

@keyframes heroSheenMove {
  0% {
    background-position: 12% 50%;
  }

  50% {
    background-position: 88% 44%;
  }

  100% {
    background-position: 12% 50%;
  }
}

@media (max-width: 720px) {
  .hero-panel {
    padding: 104px 24px 40px;
    align-items: flex-start;
  }

  .panel-rule {
    top: 68px;
    left: 24px;
    width: 100%;
  }

  h1 {
    font-size: clamp(42px, 11vw, 66px);
  }

  .intro-line {
    font-size: clamp(18px, 4.5vw, 25px);
  }

  .concept-gallery-page,
  .mockup-gallery-page {
    min-height: auto;
    padding: 58px 18px;
  }

  .concept-gallery-page {
    display: block;
  }

  .concept-grid,
  .mockup-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .concept-card {
    grid-template-rows: minmax(260px, auto) auto;
    gap: 14px;
  }

  .concept-logo {
    max-height: 420px;
  }

  .mockup-grid img {
    border-radius: 6px;
  }
}

@media (min-width: 721px) and (max-width: 1100px) {
  .concept-grid,
  .mockup-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-card {
    grid-template-rows: minmax(280px, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-panel::before,
  .hero-panel::after {
    animation: none;
  }
}