/* ============================================
   STYLE.CSS — Patent Filing Platform
   Aesthetic: Industrial / Utilitarian
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=DM+Sans:wght@300;400;500&display=swap');

/* ---- Variables ---- */
:root {
  --bg: #f4f1ec;
  --surface: #ffffff;
  --border: #c8c0b4;
  --text: #1a1a18;
  --text-muted: #7a756d;
  --accent: #c0392b;
  --accent-hover: #a93226;
  --mono: 'Space Mono', monospace;
  --sans: 'DM Sans', sans-serif;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  padding: 0;
}

/* ---- Header Bar ---- */
.site-header {
  border-bottom: 2px solid var(--text);
  padding: 18px 40px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg);
}

.site-header .logo {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.site-header .logo span {
  color: var(--accent);
}

/* ---- Page Layout ---- */
.page-wrapper {
  max-width: 680px;
  margin: 80px auto;
  padding: 0 24px;
}

/* ---- Headings ---- */
h1 {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  line-height: 1.2;
}

h2 {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ---- Forms ---- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 40px;
}

label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

input[type="text"] {
  font-family: var(--sans);
  font-size: 1rem;
  border: 2px solid var(--border);
  background: var(--surface);
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

input[type="text"]:focus {
  border-color: var(--text);
}

input[type="submit"],
button {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--text);
  color: var(--bg);
  border: 2px solid var(--text);
  padding: 12px 28px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  align-self: flex-start;
  margin-top: 4px;
}

input[type="submit"]:hover,
button:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---- File Upload ---- */
.upload-zone {
  border: 2px dashed var(--border);
  background: var(--surface);
  padding: 32px 24px;
  text-align: center;
  transition: border-color 0.15s;
  margin-bottom: 16px;
}

.upload-zone:hover {
  border-color: var(--text);
}

input[type="file"] {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
}

.upload-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* ---- Response Message ---- */
#responseMessage {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  min-height: 20px;
  margin: 16px 0;
  letter-spacing: 0.05em;
}

/* ---- Patents Container ---- */
#patents-container {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

#patents-container > div {
  border: 1px solid var(--border);
  border-top: none;
  padding: 20px 24px;
  background: var(--surface);
  animation: slideIn 0.25s ease;
}

#patents-container > div:first-child {
  border-top: 1px solid var(--border);
}

#patents-container > div > *:first-child {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

#patents-container p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

#patents-container button {
  margin-top: 14px;
  font-size: 11px;
  padding: 8px 18px;
}

/* ---- Welcome Badge ---- */
.welcome-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.welcome-badge span {
  color: var(--text);
  font-weight: 700;
}

/* ---- Message div (index page) ---- */
.flash-message {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-top: 20px;
  letter-spacing: 0.05em;
}

/* ---- Animations ---- */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Footer Rule ---- */
.page-wrapper::after {
  content: '';
  display: block;
  border-top: 1px solid var(--border);
  margin-top: 80px;
}