/* =============================================================================
   RSK23 Referral, Design Tokens
   Фирменный стиль RSK23 (взято из templates/rsk23-dark)
   ============================================================================= */

:root {
  /* === ЦВЕТА БРЕНДА === */
  --rsk-bg-dark:        #0D1B2A;
  --rsk-bg-darker:      #0a1218;
  --rsk-bg-card:        #15263a;
  --rsk-bg-card-2:      #0f1e28;

  --rsk-teal:           #5BA8B5;       /* основной бирюзовый */
  --rsk-teal-light:     #8ABEC8;
  --rsk-teal-dark:      #2d7a87;
  --rsk-teal-rgb:       91, 168, 181;

  --rsk-orange:         #E8873A;       /* акцент */
  --rsk-orange-rgb:     232, 135, 58;

  --rsk-cream:          #fdfdfb;       /* светлый фон */
  --rsk-cream-2:        #f5f1ea;
  --rsk-cream-3:        #E8E2D9;

  --rsk-text-light:     #E8E2D9;
  --rsk-text-dark:      #0D1B2A;
  --rsk-text-muted:     #8a94a0;

  --rsk-success:        #4ade80;
  --rsk-warning:        #f59e0b;
  --rsk-danger:         #ef4444;

  /* === ГРАДИЕНТЫ === */
  --rsk-grad-card:      linear-gradient(135deg, #15263a 0%, #0f1e28 100%);
  --rsk-grad-teal:      linear-gradient(135deg, #5BA8B5 0%, #2d7a87 100%);
  --rsk-grad-hero:      linear-gradient(180deg, #0D1B2A 0%, #15263a 50%, #0a1218 100%);

  /* === ТИПОГРАФИКА === */
  --rsk-font-base:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --rsk-font-display:   "Inter", var(--rsk-font-base);

  --rsk-text-xs:        0.75rem;       /* 12px */
  --rsk-text-sm:        0.875rem;      /* 14px */
  --rsk-text-base:      1rem;          /* 16px */
  --rsk-text-lg:        1.125rem;      /* 18px */
  --rsk-text-xl:        1.25rem;       /* 20px */
  --rsk-text-2xl:       1.5rem;        /* 24px */
  --rsk-text-3xl:       1.875rem;      /* 30px */
  --rsk-text-4xl:       clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --rsk-text-hero:      clamp(2.5rem, 1.5rem + 4vw, 4.5rem);

  --rsk-leading-tight:  1.2;
  --rsk-leading-normal: 1.5;
  --rsk-leading-loose:  1.7;

  /* === ОТСТУПЫ === */
  --rsk-space-1:        0.25rem;
  --rsk-space-2:        0.5rem;
  --rsk-space-3:        0.75rem;
  --rsk-space-4:        1rem;
  --rsk-space-5:        1.25rem;
  --rsk-space-6:        1.5rem;
  --rsk-space-8:        2rem;
  --rsk-space-10:       2.5rem;
  --rsk-space-12:       3rem;
  --rsk-space-16:       4rem;
  --rsk-space-20:       5rem;
  --rsk-section:        clamp(3rem, 2rem + 4vw, 6rem);

  /* === РАДИУС === */
  --rsk-radius-sm:      6px;
  --rsk-radius-md:      10px;
  --rsk-radius-lg:      16px;
  --rsk-radius-xl:      24px;
  --rsk-radius-pill:    999px;

  /* === ТЕНИ === */
  --rsk-shadow-sm:      0 1px 2px rgba(0, 0, 0, 0.2);
  --rsk-shadow-md:      0 4px 12px rgba(0, 0, 0, 0.25);
  --rsk-shadow-lg:      0 12px 32px rgba(0, 0, 0, 0.35);
  --rsk-shadow-glow:    0 0 24px rgba(var(--rsk-teal-rgb), 0.35);

  /* === АНИМАЦИИ === */
  --rsk-dur-fast:       150ms;
  --rsk-dur-normal:     250ms;
  --rsk-dur-slow:       400ms;
  --rsk-ease:           cubic-bezier(0.16, 1, 0.3, 1);

  /* === КОНТЕЙНЕРЫ === */
  --rsk-container:      min(1200px, 100% - 2rem);
  --rsk-container-narrow: min(720px, 100% - 2rem);
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { max-width: 100%; height: auto; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; }
a { color: inherit; }

body {
  font-family: var(--rsk-font-base);
  font-size: var(--rsk-text-base);
  line-height: var(--rsk-leading-normal);
  background: var(--rsk-bg-dark);
  color: var(--rsk-text-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === ТИПОВЫЕ КЛАССЫ === */
.rsk-container { width: var(--rsk-container); margin-inline: auto; }
.rsk-container-narrow { width: var(--rsk-container-narrow); margin-inline: auto; }

.rsk-text-teal { color: var(--rsk-teal); }
.rsk-text-orange { color: var(--rsk-orange); }
.rsk-text-muted { color: var(--rsk-text-muted); }

.rsk-card {
  background: var(--rsk-grad-card);
  border-radius: var(--rsk-radius-lg);
  padding: var(--rsk-space-6);
  box-shadow: var(--rsk-shadow-md);
}

.rsk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--rsk-space-2);
  padding: var(--rsk-space-3) var(--rsk-space-6);
  border-radius: var(--rsk-radius-md);
  font-weight: 600;
  font-size: var(--rsk-text-base);
  transition: transform var(--rsk-dur-fast) var(--rsk-ease),
              box-shadow var(--rsk-dur-normal) var(--rsk-ease),
              background var(--rsk-dur-normal) var(--rsk-ease);
  text-decoration: none;
  user-select: none;
}
.rsk-btn:hover { transform: translateY(-1px); }
.rsk-btn:active { transform: translateY(0); }
.rsk-btn:focus-visible { outline: 2px solid var(--rsk-teal-light); outline-offset: 2px; }
.rsk-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.rsk-btn-primary {
  background: var(--rsk-grad-teal);
  color: #fff;
}
.rsk-btn-primary:hover { box-shadow: var(--rsk-shadow-glow); }

.rsk-btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--rsk-text-light);
  border: 1px solid rgba(var(--rsk-teal-rgb), 0.3);
}
.rsk-btn-secondary:hover { background: rgba(var(--rsk-teal-rgb), 0.15); }

.rsk-btn-ghost {
  background: transparent;
  color: var(--rsk-teal);
}
.rsk-btn-ghost:hover { color: var(--rsk-teal-light); }

.rsk-input {
  width: 100%;
  padding: var(--rsk-space-3) var(--rsk-space-4);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--rsk-radius-md);
  color: var(--rsk-text-light);
  font-size: var(--rsk-text-base);
  transition: border-color var(--rsk-dur-fast),
              background var(--rsk-dur-fast);
}
.rsk-input:focus {
  outline: none;
  border-color: var(--rsk-teal);
  background: rgba(255, 255, 255, 0.1);
}
.rsk-input.is-valid { border-color: var(--rsk-success); }
.rsk-input.is-invalid { border-color: var(--rsk-danger); }
.rsk-input::placeholder { color: var(--rsk-text-muted); }

/* ===== select / option на тёмной теме ===== */
select.rsk-input, .rsk-input[type="date"], .rsk-input[type="time"] {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%238ABEC8' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 10px 6px;
  padding-right: 36px;
  color-scheme: dark;
}
select.rsk-input option,
select.rsk-input optgroup {
  background: var(--rsk-bg-card) !important;
  color: var(--rsk-text-light) !important;
}
/* WebKit + Blink, переопределение системного listbox */
select.rsk-input option:hover,
select.rsk-input option:focus,
select.rsk-input option:active,
select.rsk-input option:checked {
  background: linear-gradient(0deg, rgba(var(--rsk-teal-rgb), 0.3), rgba(var(--rsk-teal-rgb), 0.3)) !important;
  color: #fff !important;
}

.rsk-label {
  display: block;
  margin-bottom: var(--rsk-space-2);
  font-size: var(--rsk-text-sm);
  color: var(--rsk-text-muted);
  font-weight: 500;
}

.rsk-error {
  margin-top: var(--rsk-space-2);
  font-size: var(--rsk-text-sm);
  color: var(--rsk-danger);
  min-height: 1.2em;
}

.rsk-success-msg {
  margin-top: var(--rsk-space-2);
  font-size: var(--rsk-text-sm);
  color: var(--rsk-success);
}

/* === Honeypot (скрытое поле для ботов) === */
.rsk-honeypot {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  opacity: 0 !important;
  pointer-events: none !important;
  tab-index: -1;
}