/* ================================
   COLOR SYSTEM
================================ */

:root {
  --primary: #111827;
  --secondary: #e5e7eb;
  --accent: #84cc16;

  --white: #ffffff;
  --text-dark: #111827;
  --text-muted: #6b7280;
  --border: #d1d5db;

  --surface: #ffffff;
  --surface-soft: #f9fafb;
  --surface-dark: #1f2937;

  --danger: #dc2626;
  --focus: rgba(132, 204, 22, 0.35);

  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow-soft: 0 20px 50px rgba(17, 24, 39, 0.18);
}

/* ================================
   BASE
================================ */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text-dark);
  background:
    radial-gradient(
      circle at top left,
      rgba(132, 204, 22, 0.18),
      transparent 35%
    ),
    linear-gradient(135deg, #111827 0%, #1f2937 45%, #111827 100%);
}

/* ================================
   MAIN LAYOUT
================================ */

.app {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 24px;
}

/* ================================
   HERO
================================ */

.hero-card {
  margin-bottom: 28px;
  padding: 36px;
  border-radius: var(--radius-lg);
  background: rgba(17, 24, 39, 0.92);
  color: var(--white);
  border: 1px solid rgba(229, 231, 235, 0.18);
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  letter-spacing: 3px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.08;
}

.subtitle {
  max-width: 720px;
  margin-top: 16px;
  margin-bottom: 0;
  color: var(--secondary);
  font-size: 18px;
  line-height: 1.55;
}

/* ================================
   FORM
================================ */

.brief-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-section {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.form-section h2 {
  margin: 0 0 24px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--white);
  font-size: 22px;
  font-weight: 800;
  border-left: 8px solid var(--accent);
}

/* ================================
   FORM ROWS
================================ */

.form-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
  align-items: center;
  margin-bottom: 18px;
}

.form-row label {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}

.textarea-row {
  align-items: start;
}

.hint {
  display: block;
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
}

/* ================================
   INPUTS
================================ */

input,
textarea,
select {
  width: 100%;
  padding: 13px 15px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text-dark);
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--focus);
  background: var(--white);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

/* ================================
   RADIO / CHECKBOX
================================ */

.radio-group,
.checkbox-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-group.horizontal {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 18px;
}

.radio-group label,
.checkbox-grid label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  color: var(--primary);
}

.radio-group input,
.checkbox-grid input {
  width: auto;
  accent-color: var(--accent);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 20px;
}

/* ================================
   TABLES
================================ */

.table-actions {
  margin-bottom: 16px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
}

td input,
td textarea {
  width: 100%;
  min-width: 120px;
}

td textarea {
  min-height: 74px;
  resize: vertical;
}

/* ================================
   BUTTONS
================================ */

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 14px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(17, 24, 39, 0.94);
  border: 1px solid rgba(229, 231, 235, 0.15);
  box-shadow: var(--shadow-soft);
}

button {
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-button {
  background: var(--accent);
  color: var(--primary);
}

.primary-button:hover {
  background: #a3e635;
}

.secondary-button {
  background: var(--secondary);
  color: var(--primary);
}

.secondary-button:hover {
  background: #f3f4f6;
}

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  padding: 0;
  background: var(--primary);
  color: var(--white);
  font-size: 22px;
  line-height: 1;
}

.icon-button:hover {
  background: var(--accent);
  color: var(--primary);
}

/* ================================
   UTILITIES
================================ */

.hidden {
  display: none !important;
}

/* ================================
   RESPONSIVE
================================ */

@media (max-width: 768px) {
  body {
    background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
  }

  .app {
    padding: 24px 14px;
  }

  .hero-card,
  .form-section,
  .form-actions {
    padding: 22px;
    border-radius: 18px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .form-section h2 {
    font-size: 19px;
  }

  h1 {
    font-size: 32px;
  }

  .subtitle {
    font-size: 16px;
  }

  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  .purpose-radio {
    flex-direction: row !important;
    flex-wrap: wrap;
  }

  .form-actions {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}

.purpose-radio {
  display: flex;
  flex-direction: row !important;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
}

.purpose-radio label {
  display: flex;
  align-items: center;
  gap: 8px;
  width: auto;
}

.purpose-radio input {
  width: auto;
}

.choice-card {
  margin: 24px 0;
  padding: 20px 22px;
  border-radius: 18px;
  background: #f9fafb;
  border: 1px solid #d1d5db;
  border-left: 8px solid #84cc16;
}

.choice-title {
  margin-bottom: 16px;
  font-size: 17px;
  font-weight: 800;
  color: #111827;
}

.choice-card .radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.choice-card .radio-group label {
  padding: 10px 12px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  transition: 0.2s ease;
}

.choice-card .radio-group label:hover {
  border-color: #84cc16;
  background: #f7fee7;
}

.form-actions {
  width: 100%;
  display: flex;
}

.form-actions .primary-button {
  width: 100%;
}