/* ======================================= */
/* DNS CHECKER - MODERN UNIFIED            */
/* ======================================= */

/* ===== COLOR DEFINITIONS ===== */
/* Dark mode is default, light mode overrides via :root.light-mode */

.dns-card {
  /* Dark mode colors */
  --dns-card-bg-card: var(--secondary-bg);
  --dns-card-bg-input: var(--primary-bg);
  --dns-card-bg-record: var(--overlay-dark);
  --dns-card-bg-record-hover: var(--overlay-light);
  --dns-card-border: var(--border-color);
  --dns-card-border-dark: var(--border-dark);
  --dns-card-text: var(--text-primary);
  --dns-card-text-secondary: var(--text-secondary);
  --dns-card-button-bg: var(--link-color);
  --dns-card-button-shadow: rgba(88, 166, 255, 0.4);
  --dns-card-button-hover-shadow: rgba(88, 166, 255, 0.6);
  --dns-card-focus-border: var(--link-color);
  --dns-card-focus-shadow: rgba(88, 166, 255, 0.3);
  --dns-card-record-title: var(--link-color);
  --dns-card-record-hover-border: var(--link-color);
  --dns-card-record-hover-shadow: rgba(88, 166, 255, 0.25);
}

/* Light mode color overrides */
:root.light-mode .dns-card {
  --dns-card-bg-card: #ffffff;
  --dns-card-bg-input: #ffffff;
  --dns-card-bg-record: #f9fafb;
  --dns-card-bg-record-hover: #ffffff;
  --dns-card-border: #d0d7de;
  --dns-card-border-dark: #d0d7de;
  --dns-card-text: #24292f;
  --dns-card-text-secondary: #57606a;
  --dns-card-button-bg: #0969da;
  --dns-card-button-shadow: rgba(9, 105, 218, 0.4);
  --dns-card-button-hover-shadow: rgba(9, 105, 218, 0.6);
  --dns-card-focus-border: #0969da;
  --dns-card-focus-shadow: rgba(9, 105, 218, 0.3);
  --dns-card-record-title: #0969da;
  --dns-card-record-hover-border: #0969da;
  --dns-card-record-hover-shadow: rgba(9, 105, 218, 0.25);
}

/* ===== MAIN CARD ===== */
.dns-card {
  max-width: 1200px;
  margin: 0 auto;
  padding: 35px;
  background: var(--dns-card-bg-card);
  border: 1px solid var(--dns-card-border);
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  color: var(--dns-card-text);
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

/* Gradient top border */
.dns-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #9333ea, #3b82f6, #9333ea);
  background-size: 200% 100%;
  animation: dnsCardGradientShift 3s ease infinite;
}

@keyframes dnsCardGradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== HEADER ===== */
.dns-card h1 {
  color: var(--dns-card-text);
  font-size: 2rem;
  margin-bottom: 8px;
  text-align: center;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.dns-card-intro {
  text-align: center;
  color: var(--dns-card-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 25px;
  font-weight: 400;
}

/* ===== INPUT BOX ===== */
.dns-card-input-box {
  display: flex;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 25px;
}

.dns-card-input {
  flex: 1 1 400px;
  min-width: 260px;
  background: var(--dns-card-bg-input);
  color: var(--dns-card-text);
  border: 2px solid var(--dns-card-border-dark);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  box-sizing: border-box;
}

.dns-card-input::placeholder {
  color: var(--dns-card-text-secondary);
  opacity: 0.6;
}

.dns-card-input:focus {
  border-color: var(--dns-card-focus-border);
  outline: none;
  box-shadow: 0 0 10px var(--dns-card-focus-shadow);
}

/* ===== BUTTON ===== */
.dns-card-button {
  padding: 14px 20px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--dns-card-button-bg);
  color: white;
  box-shadow: 0 4px 12px var(--dns-card-button-shadow);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.dns-card-button::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.dns-card-button:hover::before {
  width: 300px;
  height: 300px;
}

.dns-card-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--dns-card-button-hover-shadow);
  opacity: 0.9;
}

.dns-card-button:active {
  transform: translateY(0);
}

/* ===== RESULTS GRID ===== */
.dns-card-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 25px;
}

.dns-card-record-card {
  background: var(--dns-card-bg-record);
  border: 2px solid var(--dns-card-border-dark);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.3s ease;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  box-sizing: border-box;
}

.dns-card-record-card:hover {
  border-color: var(--dns-card-record-hover-border);
  box-shadow: 0 0 20px var(--dns-card-record-hover-shadow);
  transform: translateY(-2px);
  background: var(--dns-card-bg-record-hover);
}

.dns-card-record-card h3 {
  color: var(--dns-card-record-title);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dns-card-record-card p {
  color: var(--dns-card-text);
  font-size: 0.95rem;
  font-weight: 500;
  word-break: break-all;
  margin: 4px 0;
}

.dns-card-record-card .empty {
  color: var(--dns-card-text-secondary);
  font-size: 0.9rem;
  font-style: italic;
}

/* ===== PLACEHOLDER ===== */
.dns-card-placeholder {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--dns-card-text-secondary);
  font-size: 0.9rem;
  margin: 20px 0;
}

/* ===== FEEDBACK ===== */
.dns-card-feedback {
  padding: 12px;
  border-radius: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  margin-bottom: 15px;
  color: white;
}

.dns-card-feedback.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== LOADING ===== */
.dns-card .loading {
  opacity: 0.6;
  animation: dnsPulse 1.5s ease-in-out infinite;
}

@keyframes dnsPulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .dns-card-results {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (max-width: 768px) {
  .dns-card {
    padding: 20px 14px;
    border-radius: 16px;
  }

  .dns-card h1 {
    font-size: 1.5rem;
  }

  .dns-card-intro {
    font-size: 0.85rem;
  }

  .dns-card-input {
    width: 100%;
  }

  .dns-card-button {
    width: 100%;
  }

  .dns-card-feedback {
    font-size: 0.85rem;
    padding: 10px;
  }

  .dns-card-record-card {
    padding: 16px;
  }

  .dns-card-record-card h3 {
    font-size: 0.9rem;
  }

  .dns-card-record-card p {
    font-size: 0.9rem;
  }
}

@media (max-width: 400px) {
  .dns-card {
    padding: 16px 10px;
  }

  .dns-card h1 {
    font-size: 1.3rem;
  }

  .dns-card-button {
    padding: 12px 14px;
    font-size: 0.9rem;
  }

  .dns-card-record-card {
    padding: 14px;
  }

  .dns-card-record-card p {
    font-size: 0.86rem;
  }
}