:root {
  --dark-bg: #080810;
  --dark-surface: #111118;
  --dark-input: #0e0e16;
  --accent: #5ba8a0;
  --accent-hover: #4d9890;
  --accent-border: rgba(91, 168, 160, 0.25);
  --accent-dim: rgba(91, 168, 160, 0.08);
  --text-light: #f0f0f0;
  --text-secondary: #a0a0b4;
  --text-muted: #6a6a78;
  --error: #e76565;
  --font-serif: 'Playfair Display', serif;
  --font-sans: 'Inter', sans-serif;
  --container: 760px;
  --transition: 0.35s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--dark-bg);
  color: var(--text-light);
  line-height: 1.6;
  min-height: 100vh;
  background-image: radial-gradient(circle at 20% 10%, rgba(91,168,160,0.06) 0%, transparent 50%),
                    radial-gradient(circle at 80% 80%, rgba(91,168,160,0.04) 0%, transparent 50%);
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Header */
.form-header { padding: 32px 0; border-bottom: 1px solid var(--accent-dim); }
.logo { display: inline-flex; flex-direction: column; line-height: 1.1; text-decoration: none; }
.logo-name { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 700; color: var(--accent); letter-spacing: 0.05em; }
.logo-tagline { font-size: 0.65rem; color: var(--text-secondary); letter-spacing: 0.12em; text-transform: uppercase; }

/* Main */
.form-main { padding: 80px 0 120px; }

/* Intro */
.form-intro { margin-bottom: 60px; text-align: center; }
.form-eyebrow { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.form-title { font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; line-height: 1.1; margin-bottom: 20px; color: var(--text-light); }
.form-title em { font-style: italic; color: var(--accent); }
.form-subtitle { font-size: 1rem; color: var(--text-secondary); line-height: 1.75; max-width: 560px; margin: 0 auto; }

/* Form grid */
.form-grid { display: flex; flex-direction: column; gap: 36px; }

/* Sections (brief form) */
.form-section { padding: 40px 32px; background: var(--dark-surface); border: 1px solid var(--accent-dim); border-radius: 14px; display: flex; flex-direction: column; gap: 28px; }
.section-header { display: flex; align-items: center; gap: 16px; padding-bottom: 24px; border-bottom: 1px solid var(--accent-dim); }
.section-num { font-family: var(--font-sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.15em; color: var(--accent); padding: 4px 10px; background: var(--accent-dim); border-radius: 4px; border: 1px solid var(--accent-border); }
.section-title { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 700; color: var(--text-light); }

/* Fields */
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 0.92rem; font-weight: 500; color: var(--text-light); }
.field-help { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; margin-top: -2px; margin-bottom: 4px; }

/* Inputs */
.field input[type="text"],
.field input[type="email"],
.field textarea,
.field select {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--dark-input);
  color: var(--text-light);
  border: 1.5px solid rgba(105, 198, 189, 0.2);
  border-radius: 8px;
  transition: border-color var(--transition), background var(--transition);
  outline: none;
}

/* Custom dropdown arrow */
.field select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235ba8a0' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  cursor: pointer;
}

.field select option {
  background: var(--dark-input);
  color: var(--text-light);
  padding: 12px;
}
.field input:hover, .field textarea:hover, .field select:hover {
  border-color: rgba(91,168,160,0.3);
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--accent);
  background: rgba(91,168,160,0.03);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-muted); }
.field textarea { resize: vertical; min-height: 100px; font-family: var(--font-sans); line-height: 1.6; }

/* Form rows */
.form-row { display: flex; gap: 16px; }
.form-row.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row .field { flex: 1; }

.budget-row { align-items: stretch; }
.currency-select { max-width: 130px; flex-shrink: 0; }
.budget-group { flex: 1; }

/* Radio cards */
.radio-group { display: flex; flex-direction: column; gap: 10px; }
.radio-group.horizontal { flex-direction: row; flex-wrap: wrap; gap: 10px; }

.radio-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--dark-input);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.88rem;
  color: var(--text-secondary);
  user-select: none;
}
.radio-group.horizontal .radio-card { flex: 0 1 auto; }
.radio-card input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--accent-dim);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: border-color var(--transition);
}
.radio-card:hover { border-color: rgba(91,168,160,0.3); color: var(--text-light); }
.radio-card:hover input[type="radio"] { border-color: var(--accent); }
.radio-card input[type="radio"]:checked {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: inset 0 0 0 3px var(--dark-input);
}
.radio-card:has(input[type="radio"]:checked) {
  border-color: var(--accent);
  background: rgba(91,168,160,0.06);
  color: var(--text-light);
}
.radio-card span { line-height: 1.4; }
.radio-card span strong { color: var(--text-light); font-weight: 500; }

/* Submit */
.submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  margin-top: 12px;
  background: var(--accent);
  color: var(--dark-bg);
  border: none;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  align-self: flex-start;
}
.submit-btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(91,168,160,0.25); }
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* Confirmation */
.confirmation { text-align: center; padding: 80px 24px; }
.confirmation-icon { color: var(--accent); margin-bottom: 24px; display: inline-block; }
.confirmation-title { font-family: var(--font-serif); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 20px; color: var(--text-light); }
.confirmation-text { font-size: 1rem; color: var(--text-secondary); max-width: 560px; margin: 0 auto 12px; line-height: 1.75; }
.confirmation-text.small { font-size: 0.9rem; color: var(--text-muted); }
.confirmation-text a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-border); transition: border-color var(--transition); }
.confirmation-text a:hover { border-color: var(--accent); }
.confirmation-link { display: inline-block; margin-top: 32px; font-size: 0.88rem; color: var(--text-secondary); text-decoration: none; transition: color var(--transition); }
.confirmation-link:hover { color: var(--accent); }

/* Error state — triggers automatically when required fields are missing */
.field input:user-invalid,
.field textarea:user-invalid,
.field select:user-invalid {
  border-color: var(--error);
  background: rgba(231, 101, 101, 0.04);
}

.field:has(input:user-invalid) label,
.field:has(textarea:user-invalid) label,
.field:has(select:user-invalid) label {
  color: var(--error);
}

.radio-group:has(input:required:user-invalid) {
  border: 1px solid var(--error);
  border-radius: 10px;
  padding: 4px;
  background: rgba(231, 101, 101, 0.04);
}

.field-error { font-size: 0.82rem; color: var(--error); margin-top: 4px; display: none; }
.field.error .field-error { display: block; }

/* Form submitted state */
.form-grid.hidden { display: none; }

/* Responsive */
@media (max-width: 640px) {
  .form-main { padding: 48px 0 80px; }
  .form-intro { margin-bottom: 40px; }
  .form-section { padding: 28px 20px; gap: 24px; }
  .form-row.two-col { grid-template-columns: 1fr; }
  .budget-row { flex-direction: column; }
  .currency-select { max-width: 100%; }
  .radio-group.horizontal { flex-direction: column; }
  .submit-btn { width: 100%; }
}