:root {
  --kapitan-bg-start: #042f3a;
  --kapitan-bg-end: #0a5a63;
  --kapitan-card-bg: rgba(7, 36, 44, 0.78);
  --kapitan-border: rgba(255, 255, 255, 0.16);
  --kapitan-text: #f2fbfc;
  --kapitan-accent: #2fd4c8;
  --kapitan-error: #ff6b6b;
  --kapitan-success: #38ef7d;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--kapitan-bg-start), var(--kapitan-bg-end));
  color: var(--kapitan-text);
  padding: clamp(64px, 10vh, 104px) clamp(28px, 5.8vw, 52px) clamp(56px, 12vh, 100px);
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

body::before {
  background: radial-gradient(
      820px 820px at 12% -14%,
      rgba(47, 212, 200, 0.26),
      transparent 60%
    ),
    radial-gradient(
      720px 720px at 90% 116%,
      rgba(12, 90, 102, 0.32),
      transparent 68%
    );
  opacity: 0.9;
}

body::after {
  background: linear-gradient(
      160deg,
      rgba(4, 38, 47, 0.36),
      rgba(4, 30, 36, 0.58)
    ),
    linear-gradient(90deg, rgba(0, 0, 0, 0.18), transparent 40%, transparent 60%, rgba(0, 0, 0, 0.2));
  mix-blend-mode: soft-light;
}

a {
  color: var(--kapitan-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.kapitan-header {
  position: fixed;
  top: 32px;
  left: 32px;
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 2;
  backdrop-filter: blur(6px);
}

.kapitan-header img {
  height: 64px;
  width: auto;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.35));
}

.kapitan-brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.kapitan-page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: clamp(16px, 3.2vh, 24px);
  flex: 1 0 auto;
}

.kapitan-hero {
  text-align: center;
  min-height: 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  line-height: 1.35;
  padding: 0 16px;
}

.kapitan-card {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: clamp(28px, 4.2vw, 40px) clamp(26px, 5vw, 42px);
  border-radius: 24px;
  background: var(--kapitan-card-bg);
  border: 1px solid var(--kapitan-border);
  backdrop-filter: blur(14px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 2.4vh, 24px);
}

.kapitan-card h1,
.kapitan-card h2 {
  margin-top: 0;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
  text-align: center;
}

.kapitan-card form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.kapitan-card p {
  margin: 0;
  line-height: 1.65;
  color: rgba(240, 250, 255, 0.84);
}

.kapitan-input {
  width: 100%;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.08);
  color: var(--kapitan-text);
  font-size: 16px;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.kapitan-input:focus {
  outline: none;
  border-color: var(--kapitan-accent);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(47, 212, 200, 0.14);
}

.kapitan-button {
  padding: 14px 18px;
  border-radius: 14px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: linear-gradient(135deg, #1fbba8, #24e2c6);
  color: #022428;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kapitan-button[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.kapitan-button:not([disabled]):hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(47, 212, 200, 0.3);
}

.kapitan-footer {
  position: static;
  width: min(calc(100% - 72px), 560px);
  margin: clamp(32px, 7vh, 64px) auto 0;
  text-align: center;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(240, 250, 255, 0.78);
  z-index: 1;
}

.kapitan-footer-quote {
  font-style: italic;
  margin-bottom: 12px;
}

.kapitan-errors {
  margin: 0;
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.3);
  color: var(--kapitan-error);
  list-style: none;
}

.kapitan-success {
  color: var(--kapitan-success);
}

.kapitan-agreement-wrapper {
  text-align: left;
  max-height: clamp(320px, 58vh, 460px);
  overflow-y: auto;
  padding: clamp(22px, 3vh, 32px) clamp(20px, 4vw, 36px);
  margin: clamp(12px, 2vh, 20px) 0;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(
      155deg,
      rgba(12, 56, 62, 0.78),
      rgba(3, 30, 36, 0.82)
    );
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 22px 44px rgba(2, 14, 18, 0.48);
  line-height: 1.72;
  font-size: 15px;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
  scrollbar-color: rgba(47, 212, 200, 0.8) rgba(4, 30, 36, 0.55);
  position: relative;
}

.kapitan-agreement-wrapper::before,
.kapitan-agreement-wrapper::after {
  content: "";
  position: sticky;
  left: 0;
  right: 0;
  height: 42px;
  pointer-events: none;
  z-index: 1;
}

.kapitan-agreement-wrapper::before {
  top: 0;
  margin: -22px -20px 0;
  background: linear-gradient(180deg, rgba(2, 18, 22, 0.95), rgba(2, 18, 22, 0));
}

.kapitan-agreement-wrapper::after {
  bottom: 0;
  margin: 0 -20px -22px;
  background: linear-gradient(0deg, rgba(2, 18, 22, 0.95), rgba(2, 18, 22, 0));
}

.kapitan-agreement-wrapper p,
.kapitan-agreement-wrapper li {
  color: rgba(240, 250, 255, 0.9);
  text-indent: 0;
  hyphens: none;
}

.kapitan-agreement-wrapper p {
  margin: 0 0 1.1em;
}

.kapitan-agreement-wrapper ul,
.kapitan-agreement-wrapper ol {
  padding-left: 22px;
  margin: 0 0 1.1em;
}

.kapitan-agreement-wrapper strong {
  color: #ffffff;
}

.kapitan-agreement-wrapper h3 {
  margin-top: 28px;
}

.kapitan-agreement-wrapper::-webkit-scrollbar {
  width: 11px;
}

.kapitan-agreement-wrapper::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(47, 212, 200, 0.85), rgba(31, 187, 168, 0.6));
  border-radius: 999px;
  box-shadow: inset 0 0 0 2px rgba(2, 24, 28, 0.45);
}

.kapitan-agreement-wrapper::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.28);
  border-radius: 999px;
}

@supports (scrollbar-gutter: stable) {
  .kapitan-agreement-wrapper {
    scrollbar-gutter: stable both-edge;
  }
}

.kapitan-checkbox {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 15px;
}

.kapitan-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.kapitan-helper {
  font-size: 14px;
  color: rgba(240, 250, 255, 0.72);
  line-height: 1.6;
}

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

.kapitan-inline-status {
  font-size: 13px;
  min-height: 18px;
}

.kapitan-inline-status.ok {
  color: var(--kapitan-success);
}

.kapitan-inline-status.bad {
  color: var(--kapitan-error);
}

.kapitan-avatar-preview {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 255, 255, 0.3);
  object-fit: cover;
  margin: 0 auto;
}

@media (max-width: 600px) {
  body {
    padding: clamp(72px, 18vh, 108px) clamp(18px, 7vw, 28px) clamp(52px, 18vh, 84px);
  }

  .kapitan-header {
    top: 20px;
    left: 20px;
  }

  .kapitan-header img {
    height: 56px;
  }

  .kapitan-brand {
    font-size: 16px;
    letter-spacing: 0.24em;
  }

  .kapitan-card {
    padding: clamp(24px, 8vw, 30px) clamp(20px, 8vw, 26px);
  }

  .kapitan-footer {
    width: calc(100% - 40px);
    margin-top: clamp(24px, 8vh, 48px);
  }

  .kapitan-hero {
    min-height: 56px;
    padding: 0 4px;
  }

  .kapitan-agreement-wrapper {
    padding: clamp(18px, 4vh, 24px) clamp(16px, 6vw, 22px);
    margin: 14px 0;
    max-height: clamp(280px, 60vh, 360px);
  }
}

@media (max-width: 520px) {
  body {
    padding: clamp(64px, 22vh, 96px) clamp(14px, 8vw, 22px) clamp(48px, 20vh, 76px);
  }

  .kapitan-card {
    padding: clamp(22px, 9vw, 26px) clamp(16px, 8vw, 20px);
  }

  .kapitan-header {
    gap: 10px;
  }

  .kapitan-footer {
    width: calc(100% - 24px);
    margin-top: clamp(24px, 10vh, 42px);
  }

  .kapitan-hero {
    min-height: 52px;
  }

  .kapitan-agreement-wrapper {
    padding: clamp(16px, 4vh, 22px) clamp(14px, 8vw, 20px);
    margin: 12px 0;
  }
}

@media (max-height: 720px) {
  body {
    padding-top: clamp(48px, 8vh, 64px);
    padding-bottom: clamp(40px, 12vh, 72px);
  }

  .kapitan-card {
    padding-block: clamp(24px, 6vh, 32px);
  }

  .kapitan-footer {
    margin-top: clamp(24px, 6vh, 40px);
  }
}