* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* display যুক্ত element-এ hidden attribute নিশ্চিতভাবে কাজ করবে */
[hidden] {
  display: none !important;
}

:root {
  --bg: #0b0b12;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.09);
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.12);
  --text: #eef1f6;
  --text-dim: #8b93a7;
  --accent: #7c5cff;
  --accent-2: #b44dff;
  --accent-glow: rgba(124, 92, 255, 0.45);
  --success: #35e0a1;
  --danger: #ff5f6d;
  --radius: 14px;
  font-family: 'Hind Siliguri', 'Inter', system-ui, sans-serif;
}

body {
  background: var(--bg);
  min-height: 100vh;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  overflow-x: hidden;
  position: relative;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 480px;
  height: 480px;
  background: rgba(124, 92, 255, 0.22);
  top: -160px;
  left: -120px;
}

.glow-2 {
  width: 420px;
  height: 420px;
  background: rgba(180, 77, 255, 0.16);
  bottom: -140px;
  right: -100px;
}

.page {
  width: 100%;
  max-width: 540px;
  position: relative;
  z-index: 1;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 2.4rem;
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

.header {
  text-align: center;
  margin-bottom: 2.2rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: 'Inter', sans-serif;
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: -1px;
}

.logo-icon {
  font-size: 1.7rem;
}

.accent-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 0.4rem;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.4px;
}

.field {
  margin-bottom: 1.3rem;
}

.field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.field .required {
  color: var(--danger);
}

.field .optional {
  color: var(--text-dim);
  font-weight: 400;
  font-size: 0.8rem;
}

.field input {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input::placeholder {
  color: rgba(139, 147, 167, 0.5);
}

.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.field .hint {
  margin-top: 0.45rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.field .hint code {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  font-family: 'Inter', monospace;
}

#submit-btn {
  width: 100%;
  padding: 0.9rem;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}

#submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(124, 92, 255, 0.45);
}

#submit-btn:active:not(:disabled) {
  transform: translateY(0);
}

#submit-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 3px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error {
  margin-top: 1.1rem;
  background: rgba(255, 95, 109, 0.1);
  border: 1px solid rgba(255, 95, 109, 0.3);
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
}

/* ---------- Result ---------- */

.result {
  margin-top: 1.5rem;
  animation: fadeUp 0.3s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-label {
  font-size: 0.9rem;
  color: var(--success);
  font-weight: 600;
  margin-bottom: 0.55rem;
  text-align: center;
}

.result-box {
  display: flex;
  align-items: stretch;
  gap: 0.6rem;
  background: var(--input-bg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.4rem;
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.result-box input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--success);
  font-size: 0.98rem;
  font-weight: 600;
  font-family: 'Inter', monospace;
  padding: 0.45rem 0.5rem;
}

#copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  padding: 0 1.1rem;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.12s, opacity 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(124, 92, 255, 0.35);
}

#copy-btn:hover {
  transform: translateY(-1px);
  opacity: 0.93;
}

#copy-btn.copied {
  background: linear-gradient(135deg, #1fae7f, #2fd495);
  box-shadow: 0 4px 16px rgba(53, 224, 161, 0.4);
}

#copy-btn .copy-icon {
  font-size: 1.05rem;
}

.result-actions {
  display: flex;
  gap: 0.7rem;
  margin-top: 0.8rem;
  justify-content: center;
}

.ghost-btn {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text);
  padding: 0.7rem;
  border-radius: var(--radius);
  font-family: 'Hind Siliguri', sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.ghost-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
}

.footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: 1.6rem;
}

.footer a {
  color: var(--accent-2);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* ---------- Header / User area ---------- */

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.user-area {
  display: flex;
  align-items: center;
}

.user-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  color: #fff;
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.5rem 0.9rem;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.12s, opacity 0.15s;
}

.user-btn:hover {
  transform: translateY(-1px);
  opacity: 0.92;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 0.3rem 0.35rem 0.3rem 0.8rem;
  border-radius: 10px;
}

.user-email {
  font-size: 0.8rem;
  color: var(--text-dim);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.logout-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--input-border);
  color: var(--text);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.15s;
}

.logout-btn:hover {
  background: rgba(255, 95, 109, 0.25);
  border-color: var(--danger);
}

/* ---------- My Links ---------- */

.my-links-card {
  margin-top: 1.2rem;
  padding: 1.6rem;
}

.my-links-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.my-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.my-links-empty {
  color: var(--text-dim);
  font-size: 0.88rem;
  text-align: center;
  padding: 0.6rem 0;
}

.link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
}

.link-item-main {
  min-width: 0;
  flex: 1;
}

.link-item-url {
  display: block;
  font-family: 'Inter', monospace;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--success);
  word-break: break-all;
}

.link-item-original {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-item-actions {
  display: flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.item-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--input-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.15s, border-color 0.15s;
}

.item-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.item-btn-danger:hover {
  background: rgba(255, 95, 109, 0.2);
  border-color: var(--danger);
}

/* ---------- Auth modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal {
  position: relative;
  background: #14141f;
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}

.modal-close {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: var(--text-dim);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1.3rem;
}

.auth-submit {
  width: 100%;
  padding: 0.85rem;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: opacity 0.15s, transform 0.15s;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}

.auth-submit:hover:not(:disabled) {
  transform: translateY(-1px);
}

.auth-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.auth-error {
  margin-top: 0;
  margin-bottom: 1rem;
}

.auth-toggle {
  text-align: center;
  margin-top: 1.1rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.auth-toggle a {
  color: var(--accent-2);
  font-weight: 600;
  text-decoration: none;
}

.auth-toggle a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .card {
    padding: 1.6rem;
  }

  .user-email {
    max-width: 120px;
  }
}