/* ── Reset & Custom Properties ─────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --navy:       #0d1b2a;
  --navy-mid:   #1a2e45;
  --navy-soft:  #243b55;
  --navy-card:  #162032;
  --blue:       #2979ff;
  --blue-light: #5e9eff;
  --blue-dim:   rgba(41, 121, 255, 0.15);
  --gold:       #f0b429;
  --gold-light: #f7d070;
  --gold-dim:   rgba(240, 180, 41, 0.12);
  --white:      #ffffff;
  --off-white:  #e8f0fb;
  --muted:      #7a9abf;
  --border:     #1e3452;
  --border-soft:#2c4263;
  --success:    #26c6a2;
  --error:      #ff5c6e;
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --shadow-sm:  0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow:     0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg:  0 8px 40px rgba(0, 0, 0, 0.5);
  --transition: 0.18s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--navy);
  color: var(--white);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Header ──────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-soft) 100%);
  border-bottom: 2px solid var(--gold);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-logo {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--gold) 100%);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(41, 121, 255, 0.3);
}

.header-text h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.2;
}

.header-text h1 em {
  font-style: normal;
  color: var(--gold);
}

.header-text p {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.header-badge {
  margin-left: auto;
  background: var(--gold-dim);
  border: 1px solid rgba(240, 180, 41, 0.3);
  border-radius: 20px;
  padding: 0.3rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gold-light);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

/* ── Main Layout ─────────────────────────────────────────────── */
.main-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* ── Panel ───────────────────────────────────────────────────── */
.panel {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.panel-icon {
  width: 34px;
  height: 34px;
  background: var(--blue-dim);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.panel-title {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--off-white);
}

.panel-subtitle {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

/* ── Sample Data Banner ──────────────────────────────────────── */
.sample-banner {
  background: linear-gradient(135deg, var(--blue-dim), var(--gold-dim));
  border: 1px solid rgba(41, 121, 255, 0.25);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.sample-banner-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.sample-banner-text strong {
  font-size: 0.82rem;
  color: var(--off-white);
}

.sample-banner-text span {
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Form ────────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field.full {
  grid-column: 1 / -1;
}

label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
}

.required {
  color: var(--gold);
  margin-left: 2px;
}

input[type="text"],
input[type="date"],
textarea,
select {
  background: var(--navy-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.9rem;
  font-family: inherit;
  line-height: 1.5;
  padding: 0.6rem 0.85rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

input::placeholder,
textarea::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(41, 121, 255, 0.18);
}

input.field-error,
textarea.field-error {
  border-color: var(--error) !important;
  box-shadow: 0 0 0 3px rgba(255, 92, 110, 0.15) !important;
}

textarea {
  resize: vertical;
  min-height: 88px;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.6) sepia(1) saturate(0.5);
  cursor: pointer;
}

/* ── Form Actions ────────────────────────────────────────────── */
.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.65rem 1.2rem;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  filter: none !important;
}

/* Primary — blue */
.btn-primary {
  background: linear-gradient(135deg, var(--blue), #1a56cc);
  color: var(--white);
  box-shadow: 0 2px 14px rgba(41, 121, 255, 0.4);
}
.btn-primary:not(:disabled):hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(41, 121, 255, 0.5);
}

/* Gold */
.btn-gold {
  background: linear-gradient(135deg, var(--gold), #c98200);
  color: var(--navy);
  box-shadow: 0 2px 10px rgba(240, 180, 41, 0.25);
}
.btn-gold:not(:disabled):hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

/* Success / green */
.btn-success {
  background: linear-gradient(135deg, var(--success), #1a9478);
  color: var(--white);
}
.btn-success:not(:disabled):hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--muted);
}
.btn-ghost:not(:disabled):hover {
  border-color: var(--blue-light);
  color: var(--off-white);
  background: var(--blue-dim);
}

/* Danger ghost */
.btn-danger {
  background: transparent;
  border: 1px solid rgba(255, 92, 110, 0.3);
  color: #ff8a96;
}
.btn-danger:not(:disabled):hover {
  border-color: var(--error);
  background: rgba(255, 92, 110, 0.1);
  color: var(--white);
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.5rem 0.95rem;
}

.btn-icon {
  font-size: 0.95rem;
}

/* ── Output Panel ────────────────────────────────────────────── */
.output-sticky {
  position: sticky;
  top: 100px;
}

.output-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3.5rem 2rem;
  gap: 1rem;
  min-height: 380px;
}

.placeholder-graphic {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--blue-dim), var(--gold-dim));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border: 2px solid var(--border-soft);
}

.output-placeholder h3 {
  font-size: 1rem;
  color: var(--off-white);
}

.output-placeholder p {
  font-size: 0.84rem;
  color: var(--muted);
  max-width: 280px;
  line-height: 1.6;
}

/* output revealed */
#plan-content {
  display: none;
}

#plan-text {
  background: var(--navy-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  color: #c8dff5;
  font-family: 'Consolas', 'Cascadia Code', 'Menlo', monospace;
  font-size: 0.83rem;
  line-height: 1.8;
  max-height: 580px;
  overflow-y: auto;
  padding: 1.25rem 1.4rem;
  white-space: pre-wrap;
  word-break: break-word;
}

#plan-text::-webkit-scrollbar { width: 5px; }
#plan-text::-webkit-scrollbar-track { background: var(--navy-mid); border-radius: 3px; }
#plan-text::-webkit-scrollbar-thumb { background: var(--border-soft); border-radius: 3px; }

.output-actions {
  display: flex;
  gap: 0.65rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

/* ── Toast ───────────────────────────────────────────────────── */
#toast {
  align-items: center;
  background: var(--success);
  border-radius: var(--radius);
  bottom: 1.75rem;
  box-shadow: var(--shadow-lg);
  color: var(--navy);
  display: flex;
  font-size: 0.88rem;
  font-weight: 700;
  gap: 0.5rem;
  opacity: 0;
  padding: 0.75rem 1.3rem;
  position: fixed;
  right: 1.75rem;
  transform: translateY(60px);
  transition: all 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 9999;
  pointer-events: none;
}

#toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  padding: 1.5rem 2rem;
  text-align: center;
}

.site-footer strong {
  color: var(--gold-light);
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-5px); }
  40%       { transform: translateX(5px); }
  60%       { transform: translateX(-3px); }
  80%       { transform: translateX(3px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.35s ease both;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 960px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  .output-sticky {
    position: static;
  }
}

@media (max-width: 640px) {
  .site-header { padding: 1.25rem 1rem; }
  .header-badge { display: none; }
  .main-layout { padding: 1.25rem 1rem 4rem; gap: 1.5rem; }
  .panel { padding: 1.25rem; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .form-actions,
  .output-actions { flex-direction: column; }
  .btn { width: 100%; }
  .sample-banner { flex-direction: column; align-items: flex-start; }
}