/* ===== CSS Variables ===== */
:root {
  --primary: #0077B5;
  --primary-dark: #005582;
  --primary-light: #00A0DC;
  --bg-dark: #0f0f1a;
  --bg-darker: #0a0a12;
  --bg-card: #16162a;
  --bg-card-hover: #1e1e38;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;
  --border-color: #2a2a4a;
  --border-light: #3a3a5a;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== App Container ===== */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Header ===== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.logo svg {
  flex-shrink: 0;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.size-badge {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  padding: 32px 0;
}

/* ===== Preview Section ===== */
.preview-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.preview-controls {
  display: flex;
  gap: 8px;
}

.preview-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.preview-container {
  position: relative;
  width: 100%;
  max-width: 100%;
  aspect-ratio: 1584 / 396;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

#bannerCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ===== Safe Zone Overlay ===== */
.safe-zone-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  transition: var(--transition);
}

.safe-zone-overlay.hidden {
  opacity: 0;
}

.profile-circle {
  position: absolute;
  bottom: -40px;
  left: 30px;
  width: 160px;
  height: 160px;
  border: 2px dashed rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(2px);
}

.safe-zone-label {
  position: absolute;
  bottom: 8px;
  left: 30px;
  transform: translateX(170px);
  background: rgba(0, 0, 0, 0.75);
  color: white;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  white-space: nowrap;
}

.preview-footer {
  display: flex;
  justify-content: center;
}

.preview-note {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===== Controls Section ===== */
.controls-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
  padding-right: 8px;
}

.controls-section::-webkit-scrollbar {
  width: 6px;
}

.controls-section::-webkit-scrollbar-track {
  background: var(--bg-darker);
  border-radius: 3px;
}

.controls-section::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.controls-section::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* ===== Control Group ===== */
.control-group {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.control-group h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.control-group h3 svg {
  color: var(--primary-light);
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.control-row:last-child {
  margin-bottom: 0;
}

.control-row label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.control-row.hidden {
  display: none;
}

/* ===== Input Styles ===== */
input[type="text"],
select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: var(--transition);
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 119, 181, 0.2);
}

input[type="text"]::placeholder {
  color: var(--text-muted);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a0a0b0' stroke-width='2' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ===== Color Picker ===== */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px;
}

input[type="color"] {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
  padding: 0;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
}

.color-value {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.gradient-colors {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gradient-colors svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.gradient-colors .color-picker-wrapper {
  flex: 1;
}

/* ===== Preset Colors ===== */
.preset-colors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-color {
  width: 32px;
  height: 32px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.preset-color:hover {
  transform: scale(1.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.preset-color:active {
  transform: scale(0.95);
}

/* ===== Range Input ===== */
.range-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

input[type="range"] {
  flex: 1;
  height: 6px;
  background: var(--bg-darker);
  border-radius: 3px;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 119, 181, 0.4);
  transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-value {
  min-width: 48px;
  text-align: right;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ===== Toggle Group ===== */
.toggle-group {
  display: flex;
  background: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 4px;
}

.toggle-btn {
  flex: 1;
  padding: 10px 16px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.toggle-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  box-shadow: 0 2px 8px rgba(0, 119, 181, 0.3);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.btn-outline.active {
  border-color: var(--primary);
  background: rgba(0, 119, 181, 0.15);
  color: var(--primary-light);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  box-shadow: 0 4px 12px rgba(0, 119, 181, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 119, 181, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-large {
  width: 100%;
  padding: 16px 24px;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

/* ===== Download Section ===== */
.download-section {
  background: linear-gradient(135deg, rgba(0, 119, 181, 0.1), rgba(0, 160, 220, 0.1));
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.download-note {
  margin-top: 12px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===== AdSense Containers ===== */
.ad-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px 0;
}

.ad-placeholder {
  width: 100%;
  max-width: 728px;
  min-height: 90px;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  justify-content: center;
  align-items: center;
}

.ad-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ad-top {
  margin-bottom: 8px;
}

.ad-bottom {
  margin-top: 8px;
}

/* Hide ad placeholders when ads are active */
.ad-placeholder:has(.adsbygoogle[data-ad-status="filled"]) .ad-label {
  display: none;
}

@media (max-width: 768px) {
  .ad-placeholder {
    max-width: 320px;
    min-height: 100px;
  }
}

/* ===== Footer ===== */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 119, 181, 0.3);
}

.social-link svg {
  width: 18px;
  height: 18px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .controls-section {
    max-height: none;
    overflow-y: visible;
  }

  .preview-wrapper {
    padding: 16px;
  }
}

@media (max-width: 640px) {
  .app-container {
    padding: 0 16px;
  }

  .header {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .logo {
    font-size: 1.125rem;
  }

  .main-content {
    padding: 20px 0;
  }

  .control-group {
    padding: 16px;
  }

  .gradient-colors {
    flex-direction: column;
    align-items: stretch;
  }

  .gradient-colors svg {
    transform: rotate(90deg);
    margin: 4px auto;
  }

  .safe-zone-label {
    display: none;
  }
}

/* ===== Animations ===== */
@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }
}

.downloading .btn-primary {
  pointer-events: none;
  animation: pulse 1s infinite;
}