/* ============================================================
   DYNASTY GATE 2 — PRIVATE DOCUMENT UPLOAD
   Handler architecture: Walter (greeting) → Alice (verification)
   Art Direction: Stadium dark palette, gold accents
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem; --radius-xl: 1rem;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;

  --content-narrow: 640px;
  --content-default: 720px;
}

/* --- Dynasty Dark Palette --- */
:root {
  --color-bg: #0b0e13;
  --color-surface: #111621;
  --color-surface-2: #171d2a;
  --color-surface-offset: #0f1319;
  --color-border: #1f2736;
  --color-divider: #1a2030;

  --color-text: #e8e6e1;
  --color-text-muted: #8a8d94;
  --color-text-faint: #555963;

  --color-gold: #c9a84c;
  --color-gold-hover: #dbb95e;
  --color-gold-active: #b89436;

  --color-primary: #c9a84c;
  --color-primary-hover: #dbb95e;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100dvh;
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 14, 19, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
}
.header-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}
.header-badge {
  font-size: var(--text-xs);
  color: var(--color-gold);
  border: 1px solid rgba(201, 168, 76, 0.3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* --- Section Inner --- */
.section-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- Handler Badge --- */
.handler-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-gold);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: var(--space-6);
}
.handler-badge svg { opacity: 0.7; color: var(--color-gold); }

/* --- Walter Section --- */
.walter-section {
  padding: var(--space-20) 0 var(--space-16);
  border-bottom: 1px solid var(--color-divider);
}
.walter-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: var(--space-6);
}
.walter-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: var(--space-6);
}
.walter-close {
  font-size: var(--text-base);
  color: var(--color-gold);
  font-weight: 600;
  font-style: italic;
}

/* --- Alice Section --- */
.alice-section {
  padding: var(--space-16) 0 var(--space-20);
}
.alice-badge span { color: var(--color-text); }
.alice-badge svg { color: var(--color-text-muted); }
.alice-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}
.alice-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: var(--space-10);
}

/* --- Upload Form --- */
.upload-form {
  max-width: 100%;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.form-group input,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  transition: border-color var(--transition-interactive);
}
.form-group input::placeholder { color: var(--color-text-faint); }
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.1);
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238a8d94' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 2.5rem;
  cursor: pointer;
}
.form-group select option {
  background: var(--color-surface);
  color: var(--color-text);
}

/* --- Form Divider --- */
.form-divider {
  height: 1px;
  background: var(--color-divider);
  margin: var(--space-8) 0;
}

/* --- Upload Zones --- */
.upload-zone {
  margin-bottom: var(--space-6);
}
.upload-zone-inner {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
  cursor: pointer;
  position: relative;
}
.upload-zone-inner:hover {
  border-color: var(--color-gold);
  background: rgba(201, 168, 76, 0.04);
}
.upload-zone-inner.dragover {
  border-color: var(--color-gold);
  background: rgba(201, 168, 76, 0.08);
  border-style: solid;
}
.upload-zone-inner.has-file {
  border-color: #2a7a3a;
  border-style: solid;
  background: rgba(42, 122, 58, 0.06);
}

.upload-icon {
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  transition: color var(--transition-interactive);
}
.upload-zone-inner:hover .upload-icon,
.upload-zone-inner.dragover .upload-icon { color: var(--color-gold); }
.upload-zone-inner.has-file .upload-icon { color: #2a7a3a; }

.upload-label {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}
.upload-doc-num {
  font-size: var(--text-xs);
  color: var(--color-gold);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.upload-doc-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}
.upload-doc-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 480px;
  margin: 0 auto;
}

.file-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.upload-btn {
  display: inline-block;
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-interactive);
}
.upload-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}
.upload-zone-inner.has-file .upload-btn {
  border-color: #2a7a3a;
  color: #2a7a3a;
}

.file-name {
  display: block;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: #3fb950;
  font-weight: 500;
  min-height: 1.4em;
}

/* --- Alice Promise --- */
.alice-promise {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin: var(--space-8) 0;
}
.alice-promise svg {
  color: var(--color-gold);
  flex-shrink: 0;
  margin-top: 2px;
}
.alice-promise span {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Submit Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-interactive);
  line-height: 1;
}
.btn-primary {
  background: var(--color-primary);
  color: #0b0e13;
  border-radius: var(--radius-md);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.btn-lg {
  width: 100%;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}
.btn-success {
  background: #2a7a3a;
  color: white;
}

.form-note {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) var(--space-6);
  text-align: center;
}
.footer-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: var(--space-4);
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}
.footer-legal {
  font-size: var(--text-xs);
  color: var(--color-gold);
  opacity: 0.6;
}