:root {
  --ink: #12151a;
  --muted: #5a6573;
  --paper: #eef2f6;
  --panel: #ffffff;
  --line: #d3dae3;
  --accent: #1f4b7a;
  --accent-ink: #f5f8fc;
  --danger: #9b2c2c;
  --shadow: 0 16px 40px rgba(18, 21, 26, 0.08);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--paper);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 55% at 0% 0%, #d9e4f0 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 10%, #cfd8c8 0%, transparent 48%),
    linear-gradient(180deg, #eef2f6 0%, #e4e9ef 100%);
}

.shell {
  width: min(560px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.5rem 0 4rem;
  position: relative;
}

.lang-switch {
  display: flex;
  gap: 0.35rem;
  justify-content: flex-end;
  margin-bottom: 1.25rem;
}

.lang-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.lang-btn.active,
.lang-btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.lang-btn:hover:not(:disabled) {
  transform: none;
}

.hero {
  margin-bottom: 1.75rem;
  animation: rise 0.7s ease both;
}

.eyebrow {
  margin: 0 0 0.5rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
}

h1 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 6vw, 3rem);
  line-height: 1.05;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.45;
  max-width: 36ch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.35rem;
  animation: rise 0.8s ease both;
  animation-delay: 0.08s;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.92rem;
  font-weight: 600;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 0.85rem 0.95rem;
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 40%, white);
  outline-offset: 1px;
}

button {
  border: 0;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.linkish {
  background: transparent;
  color: var(--accent);
  padding: 0;
  font-size: 0.92rem;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.who {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.who p {
  margin: 0;
  color: var(--muted);
}

.drop {
  position: relative;
  display: grid;
  gap: 0.35rem;
  justify-items: center;
  text-align: center;
  padding: 2rem 1rem;
  border: 1.5px dashed var(--line);
  background: #f7f9fb;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.drop.dragover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, white);
}

.drop input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.drop-hint {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 400;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  max-height: 10rem;
  overflow: auto;
  font-size: 0.92rem;
}

.file-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 0.95rem;
}

.status {
  margin: 0;
  color: var(--accent);
  font-size: 0.95rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 480px) {
  .shell {
    padding-top: 2.25rem;
  }

  .who {
    flex-direction: column;
    align-items: flex-start;
  }
}