/* DocuMind Web UI — clean SaaS / minimal */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 10px 40px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #16a34a;
  --danger: #dc2626;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1000px 600px at 15% -10%, rgba(37, 99, 235, 0.08), transparent 50%),
    radial-gradient(800px 500px at 95% 10%, rgba(22, 163, 74, 0.06), transparent 45%),
    var(--bg);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Header */
.dm-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.dm-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.dm-logo {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.dm-logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.dm-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.dm-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
}
.dm-nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Layout */
.dm-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.dm-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--muted);
  text-align: center;
}

/* Typography */
.dm-h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.dm-lead {
  margin: 0 0 1.5rem;
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 42rem;
}

.dm-h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

/* Cards */
.dm-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.dm-card--muted {
  background: rgba(255, 255, 255, 0.65);
}

.dm-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .dm-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.dm-card__title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 650;
}

.dm-card__text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

/* Hero */
.dm-hero {
  text-align: center;
  padding: 2rem 0 2.5rem;
}

.dm-hero .dm-lead {
  margin-left: auto;
  margin-right: auto;
}

.dm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
}

/* Buttons */
.dm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.125rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
}
.dm-btn:active {
  transform: translateY(1px);
}

.dm-btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}
.dm-btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}

.dm-btn--secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.dm-btn--secondary:hover {
  background: #f8fafc;
  text-decoration: none;
}

.dm-btn--ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.dm-btn--ghost:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}

.dm-btn--success {
  background: var(--success);
  color: #fff;
}
.dm-btn--success:hover {
  filter: brightness(1.05);
  color: #fff;
  text-decoration: none;
}

/* Forms */
.dm-form {
  max-width: 36rem;
}

.dm-field {
  margin-bottom: 1.25rem;
}

.dm-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.375rem;
}

.dm-input,
.dm-select,
.dm-textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 0.9375rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}
.dm-input:focus,
.dm-select:focus,
.dm-textarea:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.dm-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted);
  cursor: pointer;
}
.dm-checkbox input {
  margin-top: 0.2rem;
}

.dm-hint {
  margin: 0.35rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
}

/* Result blocks */
.dm-section {
  margin-bottom: 1.5rem;
}

.dm-section__title {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.dm-section__body {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text);
  white-space: pre-wrap;
}

.dm-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  color: var(--text);
}

/* Drive callback */
.dm-callback {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dm-callback__card {
  width: 100%;
  max-width: 28rem;
  text-align: center;
}

.dm-callback__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.125rem;
}

.dm-callback__icon--ok {
  background: color-mix(in srgb, var(--success) 14%, white);
  color: var(--success);
  border: 1px solid color-mix(in srgb, var(--success) 22%, white);
}

.dm-callback__icon--err {
  background: color-mix(in srgb, var(--danger) 12%, white);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 20%, white);
}

.dm-callback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.25rem;
}

.dm-note {
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--muted);
}