:root {
  --ink: #10231f;
  --ink-soft: #3a524c;
  --paper: #e8f0ec;
  --panel: rgba(255, 252, 247, 0.88);
  --line: rgba(16, 35, 31, 0.14);
  --accent: #0d6b56;
  --accent-deep: #084c3d;
  --warn: #9a3b1a;
  --ok: #1f6b3a;
  --dnc: #8b1e2d;
  --shadow: 0 18px 50px rgba(16, 35, 31, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(13, 107, 86, 0.22), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(154, 59, 26, 0.12), transparent 50%),
    linear-gradient(165deg, #d7e6df 0%, var(--paper) 42%, #f3efe6 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(16, 35, 31, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 35, 31, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
  position: relative;
}

.brand {
  animation: rise 0.7s ease both;
}

.brand h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
}

.brand h1 span {
  color: var(--accent);
}

.brand p {
  margin: 0.85rem 0 0;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.45;
}

.panel {
  margin-top: 2rem;
  padding: 1.4rem;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  animation: rise 0.8s ease 0.08s both;
}

.tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.tab {
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tab[aria-selected="true"] {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(13, 107, 86, 0.08);
}

.tab:hover {
  color: var(--ink);
}

.pane[hidden] {
  display: none;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
}

textarea,
input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font: inherit;
  padding: 0.85rem 0.95rem;
  resize: vertical;
}

textarea {
  min-height: 160px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.5;
}

textarea:focus,
input:focus,
.dropzone:focus-within {
  outline: 2px solid rgba(13, 107, 86, 0.35);
  outline-offset: 2px;
}

.dropzone {
  border: 1.5px dashed rgba(13, 107, 86, 0.45);
  background: rgba(13, 107, 86, 0.05);
  padding: 2rem 1rem;
  text-align: center;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.dropzone.drag {
  background: rgba(13, 107, 86, 0.12);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.dropzone p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
}

.dropzone strong {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: end;
  margin-top: 1rem;
}

.field {
  flex: 0 0 120px;
}

.column-picker {
  margin-top: 1rem;
}

.column-picker select {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font: inherit;
  padding: 0.75rem 0.9rem;
}

.column-picker .hint {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.actions {
  display: flex;
  gap: 0.6rem;
  margin-left: auto;
}

.controls .actions {
  margin-left: 0;
  width: 100%;
  justify-content: flex-end;
}

button.primary,
button.ghost {
  font: inherit;
  font-weight: 700;
  border: 1px solid transparent;
  padding: 0.75rem 1.15rem;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}

button.primary {
  background: var(--accent);
  color: #f7fffb;
}

button.primary:hover:not(:disabled) {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

button.primary:disabled {
  opacity: 0.55;
  cursor: wait;
}

button.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.status {
  margin-top: 1rem;
  min-height: 1.4rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.status.error {
  color: var(--warn);
}

.results {
  margin-top: 1.6rem;
  animation: rise 0.55s ease both;
}

.results[hidden] {
  display: none;
}

.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
}

.stat {
  padding: 0.9rem 0.75rem;
  border-top: 3px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.stat .n {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat .l {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  font-weight: 700;
}

.stat.clean {
  border-color: var(--ok);
}
.stat.dnc {
  border-color: var(--dnc);
}
.stat.invalid,
.stat.errors {
  border-color: var(--warn);
}

.exports {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 1.1rem;
}

.table-wrap {
  overflow: auto;
  max-height: 420px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  background: #eef5f1;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

td.phone {
  font-family: var(--font-mono);
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
}

.badge.dnc {
  color: var(--dnc);
  background: rgba(139, 30, 45, 0.1);
}

.badge.clean {
  color: var(--ok);
  background: rgba(31, 107, 58, 0.1);
}

.badge.bad {
  color: var(--warn);
  background: rgba(154, 59, 26, 0.1);
}

.footer-note {
  margin-top: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .actions {
    margin-left: 0;
    width: 100%;
  }

  button.primary,
  button.ghost {
    flex: 1;
  }
}