:root {
  color-scheme: dark;
  --bg: #101827;
  --panel: #192538;
  --panel-light: #223249;
  --text: #edf4ff;
  --muted: #9aabc2;
  --accent: #70b7ff;
  --border: #304158;
  --danger: #ff7777;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f2f6fc;
  --panel: #ffffff;
  --panel-light: #eaf1fa;
  --text: #172338;
  --muted: #65758b;
  --accent: #247bd1;
  --border: #d8e1ed;
  --danger: #d83e4b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
}

button, input {
  font: inherit;
}

button, .upload-button {
  cursor: pointer;
}

button {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 11px 16px;
  background: var(--panel-light);
  color: var(--text);
}

button:hover, .upload-button:hover {
  filter: brightness(1.12);
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 390px;
  padding: 35px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 20px 60px #0003;
}

.brand-icon {
  font-size: 55px;
  color: var(--accent);
}

.login-card h1 {
  margin-bottom: 8px;
}

.login-card > p {
  color: var(--muted);
  margin-bottom: 30px;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

input {
  width: 100%;
  padding: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
}

#login-form button {
  margin-top: 10px;
  background: var(--accent);
  color: #101827;
  font-weight: bold;
}

#login-error {
  color: var(--danger);
}

[hidden] {
  display: none !important;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 18px 5%;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  font-size: 22px;
}

.topbar div {
  display: flex;
  gap: 8px;
}

.dashboard {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 25px;
  max-width: 1250px;
  margin: auto;
  padding: 30px 5%;
}

.sidebar, .storage-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 13px;
  padding: 18px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: fit-content;
}

.file-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.upload-button {
  display: inline-block;
  padding: 12px 17px;
  border-radius: 9px;
  background: var(--accent);
  color: #101827;
  font-weight: bold;
}

.storage-card {
  margin-bottom: 20px;
}

.storage-card p {
  color: var(--muted);
}

progress {
  width: 100%;
  height: 12px;
  accent-color: var(--accent);
}

#search-input {
  margin-bottom: 18px;
}

.file-list {
  display: grid;
  gap: 10px;
}

.file-list > * {
  padding: 15px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}

#status-message {
  color: var(--muted);
}

@media (max-width: 650px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

  .sidebar {
    flex-direction: row;
  }

  .sidebar button {
    flex: 1;
  }

  .topbar {
    padding: 15px;
  }

  .topbar h1 {
    font-size: 18px;
  }

  .topbar div {
    gap: 5px;
  }

  .topbar button {
    padding: 9px;
    font-size: 12px;
  }

  .login-card {
    padding: 25px;
  }
}