:root {
  --purple: #673ab7;
  --purple-dark: #4b2d93;
  --bg: #f2f3f7;
  --card: #ffffff;
  --border: #dadce0;
  --text: #1f1f1f;
  --muted: #5f6368;
  --error: #d93025;
  --focus: #5e35b1;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
  --radius: 14px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --space-sm: 12px;
  --space: clamp(16px, 3vw, 24px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: clamp(10px, 3vw, 24px) clamp(10px, 4vw, 28px) clamp(12px, 4vw, 30px);
  overflow-x: hidden;
}

.page {
  width: min(100%, 760px);
  margin: 0 auto;
  display: flex;
}

.form-shell {
  width: 100%;
  display: grid;
  grid-template-rows: auto 1fr;
  background: transparent;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.form-banner {
  height: 14px;
  background: var(--purple);
}

.form-card {
  background: var(--card);
  padding: clamp(12px, 3vw, 20px) clamp(14px, 4vw, 22px) clamp(16px, 4vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  word-break: break-word;
}

.form-header {
  display: grid;
  gap: 8px;
}

.form-header h1 {
  margin: 0;
  font-size: clamp(26px, 2.5vw + 22px, 38px);
  font-weight: 750;
  letter-spacing: -0.02em;
}

.brand-info {
  margin: 0;
  color: #2b2b2b;
  line-height: 1.5;
  font-size: clamp(14px, 1vw + 12px, 16px);
}

.lead {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: clamp(14px, 1vw + 12px, 16px);
}

.required-note {
  margin: 0;
  color: var(--error);
  font-weight: 600;
  font-size: 13px;
}

.form-body {
  display: grid;
  gap: 16px;
  margin-top: 6px;
}

.field-group {
  display: grid;
  gap: 10px;
  padding: 12px 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fafafa;
}

.field-group[data-field='fullName'],
.field-group[data-field='phone'] {
  padding: 16px 16px 18px;
  border-width: 1.5px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f5ff 100%);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.06);
}

.field-group label {
  font-weight: 600;
  color: #202124;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.required {
  color: var(--error);
}

.field-group input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 10px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.field-group input:focus {
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(103, 58, 183, 0.15);
}

.field-group input.error-state {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(217, 48, 37, 0.12);
}

.error {
  margin: 0;
  color: var(--error);
  font-size: 12.5px;
  display: none;
}

.error.show {
  display: block;
}

.apply-btn {
  margin-top: 4px;
  width: 100%;
  border: none;
  border-radius: 8px;
  padding: 14px 16px;
  background: linear-gradient(180deg, var(--purple) 0%, var(--purple-dark) 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.2px;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(103, 58, 183, 0.3);
  transition: transform 100ms ease, box-shadow 100ms ease;
  min-height: 48px;
}

.brand-footnote {
  margin: 8px 0 0;
  color: #2f2f2f;
  font-size: 13px;
  line-height: 1.55;
}

.apply-btn:active {
  transform: translateY(1px);
  box-shadow: 0 6px 14px rgba(103, 58, 183, 0.28);
}

.apply-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  box-shadow: none;
}

.footnote {
  margin: 4px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

img,
video,
iframe {
  max-width: 100%;
  height: auto;
}

/* Mobile: up to 576px */
@media (max-width: 576px) {
  body {
    padding: 14px 12px 24px;
    align-items: flex-start;
  }

  .page {
    width: 100%;
  }

  .form-card {
    padding: 14px 12px 18px;
    gap: 10px;
  }

  .form-header h1 {
    font-size: 24px;
  }

  .form-body {
    gap: 10px;
  }

  .field-group {
    padding: 12px 12px 14px;
    gap: 8px;
  }

  .field-group input {
    padding: 11px 10px;
  }

  .apply-btn {
    padding: 12px 14px;
    font-size: 14px;
    min-height: 46px;
  }

  .footnote {
    font-size: 12.5px;
  }
}

/* Tablet: 577px to 768px */
@media (min-width: 577px) and (max-width: 768px) {
  body {
    padding: 22px 18px 40px;
  }

  .page {
    width: min(100%, 660px);
  }

  .form-card {
    padding: 18px 18px 24px;
  }
}

/* Small laptop: 769px to 991px */
@media (min-width: 769px) and (max-width: 991px) {
  body {
    padding: 26px 22px 44px;
  }

  .page {
    width: min(100%, 720px);
  }
}

/* Desktop 992px and up */
@media (min-width: 992px) {
  body {
    align-items: center;
  }

  .page {
    width: min(100%, 820px);
  }
}