@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #f0f2f5;
  --bg-pattern: 
    radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(244, 63, 94, 0.04) 0%, transparent 40%);
  
  --card: rgba(255, 255, 255, 0.85);
  --card-glass: rgba(255, 255, 255, 0.7);
  --card-border: rgba(255, 255, 255, 0.5);
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --primary-glow: rgba(79, 70, 229, 0.25);
  
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  
  --low: #f59e0b;
  --low-bg: rgba(245, 158, 11, 0.15);
  --low-text: #b45309;
  
  --normal: #10b981;
  --normal-bg: rgba(16, 185, 129, 0.15);
  --normal-text: #047857;
  
  --high: #ef4444;
  --high-bg: rgba(239, 68, 68, 0.15);
  --high-text: #dc2626;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 40px var(--primary-glow);
  
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: 'Plus Jakarta Sans', ui-sans-serif, system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-pattern);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

/* Header */
.header {
  padding: 16px 0 40px;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 12px 20px;
  background: var(--card-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.brand__logo {
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-dark) 100%);
  color: white;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -1px;
  box-shadow: 0 8px 20px var(--primary-glow);
  position: relative;
  overflow: hidden;
}

.brand__logo::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(transparent, rgba(255,255,255,0.2), transparent);
  transform: rotate(45deg);
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { transform: translateX(-100%) rotate(45deg); }
  50% { transform: translateX(100%) rotate(45deg); }
}

.brand__text {
  text-align: left;
}

.brand__title {
  font-size: 26px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.6px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand__subtitle {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}

/* Main Grid */
.grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: stretch;
}

/* Cards */
.card {
  background: var(--card-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--normal), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card:hover::before {
  opacity: 1;
}

.card__title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.4px;
}

.card__hint {
  margin: 8px 0 24px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* Form */
.form {
  display: grid;
  gap: 22px;
}

.field {
  display: grid;
  gap: 10px;
}

.label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.3px;
}

input {
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(148, 163, 184, 0.3);
  background: rgba(255, 255, 255, 0.6);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

input::placeholder {
  color: var(--text-light);
}

input:focus {
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 5px var(--primary-glow), var(--shadow-md);
}

input:hover:not(:focus) {
  border-color: rgba(148, 163, 184, 0.5);
  background: rgba(255, 255, 255, 0.8);
}

.field__meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.helper {
  color: var(--text-light);
  font-size: 12px;
}

.error {
  color: var(--danger);
  font-size: 12px;
  font-weight: 600;
}

/* Buttons */
.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn {
  appearance: none;
  border: none;
  padding: 16px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
  letter-spacing: 0.2px;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 8px 20px var(--primary-glow);
  flex: 1;
  position: relative;
  overflow: hidden;
}

.btn--primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn--primary:hover {
  box-shadow: 0 12px 28px var(--primary-glow), var(--shadow-lg);
  transform: translateY(-2px);
}

.btn--primary:hover::before {
  left: 100%;
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-muted);
  border: 1.5px solid rgba(148, 163, 184, 0.3);
}

.btn--ghost:hover {
  background: white;
  color: var(--text);
  border-color: var(--text-light);
  transform: translateY(-2px);
}

/* Banner */
.banner {
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.5;
}

.banner--error {
  border: 1px solid rgba(239, 68, 68, 0.2);
  background: var(--danger-bg);
  color: #991b1b;
}

/* Details */
.details {
  margin-top: 24px;
  border-top: 1px dashed rgba(148, 163, 184, 0.4);
  padding-top: 20px;
}

.details summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color var(--transition-fast);
}

.details summary:hover {
  color: var(--primary-dark);
}

.details__content {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.7;
}

.mono {
  font-family: 'SF Mono', 'Fira Code', ui-monospace, monospace;
  background: rgba(79, 70, 229, 0.06);
  border: 1px solid rgba(79, 70, 229, 0.15);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  margin: 10px 0;
  color: var(--text);
}

/* Result Section */
.result {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(248, 250, 252, 0.8) 100%);
  padding: 24px;
  position: relative;
}

.result__top {
  display: flex;
  justify-content: flex-end;
}

.pill {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius-full);
  padding: 8px 16px;
  border: 1.5px solid rgba(148, 163, 184, 0.3);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-muted);
  transition: all var(--transition-normal);
}

.result__main {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.metric__label {
  color: var(--text-light);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.metric__value {
  font-size: 60px;
  font-weight: 800;
  letter-spacing: -2px;
  margin-top: 4px;
  line-height: 1;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric__unit {
  color: var(--text-light);
  font-size: 14px;
  margin-top: 8px;
  font-weight: 600;
}

.message {
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
  margin-top: 12px;
  padding: 16px;
  background: rgba(79, 70, 229, 0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary);
}

.note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed rgba(148, 163, 184, 0.4);
  color: var(--text-light);
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-line;
}

/* BMI States */
.result--low .pill {
  border-color: var(--low);
  background: var(--low-bg);
  color: var(--low-text);
}

.result--low .metric__value {
  background: linear-gradient(135deg, var(--low-text) 0%, var(--low) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.result--normal .pill {
  border-color: var(--normal);
  background: var(--normal-bg);
  color: var(--normal-text);
}

.result--normal .metric__value {
  background: linear-gradient(135deg, var(--normal-text) 0%, var(--normal) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.result--high .pill {
  border-color: var(--high);
  background: var(--high-bg);
  color: var(--high-text);
}

.result--high .metric__value {
  background: linear-gradient(135deg, var(--high-text) 0%, var(--high) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.result--empty .metric__value {
  background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.result--empty .message {
  background: rgba(148, 163, 184, 0.1);
  border-left-color: var(--text-light);
}

/* Legend */
.legend {
  margin-top: 24px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: rgba(255, 255, 255, 0.5);
}

.legend__title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.legend__list {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.legend__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 12px currentColor;
}

.dot--low {
  background: var(--low);
  color: var(--low);
}

.dot--normal {
  background: var(--normal);
  color: var(--normal);
}

.dot--high {
  background: var(--high);
  color: var(--high);
}

.legend__small {
  margin: 16px 0 0;
  font-size: 11px;
  color: var(--text-light);
  line-height: 1.6;
}

/* Footer */
.footer {
  margin-top: 40px;
  color: var(--text-light);
  font-size: 13px;
  text-align: center;
  padding: 20px;
  background: var(--card-glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
}

/* Responsive - Large Desktop (1400px+) */
@media (min-width: 1400px) {
  .page {
    max-width: 1100px;
    padding: 60px 40px 80px;
  }
  
  .card {
    padding: 40px;
  }
  
  .metric__value {
    font-size: 72px;
  }
  
  .brand__title {
    font-size: 28px;
  }
  
  .brand__logo {
    width: 68px;
    height: 68px;
    font-size: 24px;
  }
}

/* Responsive - Laptop (1024px - 1366px) */
@media (min-width: 1024px) and (max-width: 1366px) {
  .page {
    max-width: 960px;
    padding: 40px 24px 60px;
  }
  
  .grid {
    gap: 24px;
  }
  
  .card {
    padding: 32px;
  }
  
  .brand__title {
    font-size: 24px;
  }
  
  .metric__value {
    font-size: 56px;
  }
}

/* Responsive - Desktop (max-width: 1024px) */
@media (max-width: 1024px) {
  .page {
    max-width: 900px;
    padding: 36px 20px 50px;
  }
  
  .grid {
    gap: 20px;
  }
  
  .card {
    padding: 28px;
  }
  
  .brand__title {
    font-size: 24px;
  }
}

/* Responsive - Tablet Landscape / iPad Landscape (834px - 1024px) */
@media (min-width: 834px) and (max-width: 1024px) and (orientation: landscape) {
  .page {
    padding: 24px 32px 40px;
  }
  
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
  }
  
  .brand {
    padding: 10px 18px;
    gap: 14px;
  }
  
  .brand__logo {
    width: 52px;
    height: 52px;
    font-size: 18px;
  }
  
  .brand__title {
    font-size: 20px;
  }
  
  .card {
    padding: 24px;
  }
  
  .metric__value {
    font-size: 48px;
  }
}

/* Responsive - Tablet Landscape (max-width: 900px) */
@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .card {
    padding: 28px;
  }
  
  .metric__value {
    font-size: 52px;
  }
}

/* Responsive - Tablet Portrait / iPad Mini / iPad (768px - 834px) */
@media (min-width: 768px) and (max-width: 834px) {
  .page {
    padding: 28px 24px 48px;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .card {
    padding: 28px;
  }
  
  .brand {
    padding: 16px 24px;
    flex-direction: column;
    text-align: center;
  }
  
  .brand__text {
    text-align: center;
  }
  
  .brand__logo {
    width: 64px;
    height: 64px;
    font-size: 22px;
  }
  
  .brand__title {
    font-size: 22px;
  }
  
  .metric__value {
    font-size: 52px;
  }
}

/* Responsive - Tablet Portrait (max-width: 768px) */
@media (max-width: 768px) {
  .page {
    padding: 24px 20px 40px;
  }
  
  .header {
    padding: 12px 0 32px;
  }
  
  .brand {
    padding: 14px 20px;
    gap: 14px;
    flex-direction: column;
    text-align: center;
  }
  
  .brand__text {
    text-align: center;
  }
  
  .brand__logo {
    width: 64px;
    height: 64px;
    font-size: 22px;
  }
  
  .brand__title {
    font-size: 24px;
  }
  
  .brand__subtitle {
    font-size: 13px;
  }
  
  .card {
    padding: 24px;
  }
  
  .card__title {
    font-size: 18px;
  }
  
  .form {
    gap: 18px;
  }
  
  input {
    padding: 14px 16px;
    font-size: 16px;
  }
  
  .btn {
    padding: 14px 24px;
    font-size: 14px;
  }
  
  .metric__value {
    font-size: 48px;
  }
  
  .message {
    padding: 14px;
    font-size: 14px;
  }
  
  .legend {
    padding: 20px;
  }
  
  .legend__list li {
    font-size: 13px;
  }
}

/* Responsive - Large Mobile / Phablet (540px - 600px) */
@media (min-width: 540px) and (max-width: 600px) {
  .page {
    padding: 20px 20px 32px;
  }
  
  .brand {
    padding: 16px 24px;
    gap: 12px;
  }
  
  .brand__logo {
    width: 60px;
    height: 60px;
    font-size: 20px;
  }
  
  .brand__title {
    font-size: 22px;
  }
  
  .card {
    padding: 22px;
    border-radius: var(--radius-lg);
  }
  
  .card__title {
    font-size: 17px;
  }
  
  .card__hint {
    font-size: 13px;
    margin-bottom: 18px;
  }
  
  .field {
    gap: 8px;
  }
  
  .label {
    font-size: 12px;
  }
  
  input {
    padding: 14px 15px;
    font-size: 16px;
  }
  
  .field__meta {
    flex-direction: column;
    gap: 4px;
  }
  
  .helper {
    font-size: 11px;
  }
  
  .actions {
    flex-direction: column;
    gap: 10px;
  }
  
  .btn {
    width: 100%;
    padding: 16px 20px;
    text-align: center;
  }
  
  .btn--ghost {
    order: -1;
  }
  
  .result {
    padding: 20px;
  }
  
  .metric__value {
    font-size: 44px;
  }
  
  .pill {
    font-size: 9px;
    padding: 6px 12px;
  }
  
  .legend {
    padding: 16px;
  }
  
  .legend__title {
    font-size: 14px;
  }
  
  .legend__list {
    gap: 8px;
  }
  
  .legend__list li {
    font-size: 13px;
  }
  
  .footer {
    padding: 16px;
    font-size: 12px;
  }
}

/* Responsive - Large Mobile / Small Tablet (max-width: 540px) */
@media (max-width: 540px) {
  .page {
    padding: 20px 16px 32px;
  }
  
  .card {
    padding: 20px;
    border-radius: var(--radius-lg);
  }
  
  .card__title {
    font-size: 17px;
  }
  
  .card__hint {
    font-size: 13px;
    margin-bottom: 18px;
  }
  
  .field {
    gap: 8px;
  }
  
  .label {
    font-size: 12px;
  }
  
  input {
    padding: 14px 15px;
    font-size: 16px;
  }
  
  .field__meta {
    flex-direction: column;
    gap: 4px;
  }
  
  .helper {
    font-size: 11px;
  }
  
  .actions {
    flex-direction: column;
    gap: 10px;
  }
  
  .btn {
    width: 100%;
    padding: 16px 20px;
    text-align: center;
  }
  
  .btn--ghost {
    order: -1;
  }
  
  .result {
    padding: 20px;
  }
  
  .metric__value {
    font-size: 42px;
  }
  
  .pill {
    font-size: 9px;
    padding: 6px 12px;
  }
  
  .legend {
    padding: 16px;
  }
  
  .legend__title {
    font-size: 14px;
  }
  
  .legend__list {
    gap: 8px;
  }
  
  .legend__list li {
    font-size: 13px;
  }
  
  .footer {
    padding: 16px;
    font-size: 12px;
  }
}

/* Responsive - Small Mobile (max-width: 380px) */
@media (max-width: 380px) {
  .page {
    padding: 16px 12px 28px;
  }
  
  .brand__logo {
    width: 56px;
    height: 56px;
    font-size: 20px;
  }
  
  .brand__title {
    font-size: 20px;
  }
  
  .card {
    padding: 18px;
    border-radius: var(--radius-md);
  }
  
  .metric__value {
    font-size: 36px;
  }
  
  .message {
    font-size: 13px;
    padding: 12px;
  }
  
  .mono {
    font-size: 11px;
    padding: 10px 12px;
  }
}

/* ========================================
   RESPONSIVE - PERANGKAT SPESIFIK
   ======================================== */

/* Android Phone Small (320px - 360px) */
@media (min-width: 280px) and (max-width: 360px) {
  .page {
    padding: 14px 10px 24px;
  }
  
  .brand {
    padding: 12px 16px;
    gap: 10px;
  }
  
  .brand__logo {
    width: 52px;
    height: 52px;
    font-size: 18px;
  }
  
  .brand__title {
    font-size: 18px;
  }
  
  .brand__subtitle {
    font-size: 11px;
  }
  
  .card {
    padding: 16px;
    border-radius: var(--radius-md);
  }
  
  .card__title {
    font-size: 16px;
  }
  
  .card__hint {
    font-size: 12px;
  }
  
  input {
    padding: 12px 13px;
    font-size: 16px;
  }
  
  .btn {
    padding: 14px 18px;
    font-size: 13px;
  }
  
  .metric__value {
    font-size: 32px;
  }
  
  .metric__unit {
    font-size: 12px;
  }
  
  .message {
    font-size: 12px;
    padding: 10px;
  }
  
  .pill {
    font-size: 8px;
    padding: 5px 10px;
  }
  
  .legend {
    padding: 14px;
  }
  
  .legend__title {
    font-size: 13px;
  }
  
  .legend__list li {
    font-size: 12px;
  }
  
  .legend__small {
    font-size: 10px;
  }
  
  .footer {
    padding: 14px;
    font-size: 11px;
  }
}

/* iPhone SE / Small Android (280px - 320px) */
@media (max-width: 320px) {
  .page {
    padding: 12px 8px 20px;
  }
  
  .brand {
    padding: 10px 14px;
    gap: 8px;
  }
  
  .brand__logo {
    width: 48px;
    height: 48px;
    font-size: 16px;
  }
  
  .brand__title {
    font-size: 16px;
  }
  
  .brand__subtitle {
    font-size: 10px;
  }
  
  .card {
    padding: 14px;
  }
  
  .card__title {
    font-size: 15px;
  }
  
  .card__hint {
    font-size: 11px;
    margin-bottom: 14px;
  }
  
  input {
    padding: 12px;
    font-size: 16px;
  }
  
  .label {
    font-size: 11px;
  }
  
  .btn {
    padding: 12px 16px;
    font-size: 12px;
  }
  
  .metric__value {
    font-size: 28px;
  }
  
  .message {
    font-size: 11px;
    padding: 8px;
  }
  
  .note {
    font-size: 10px;
  }
  
  .legend__title {
    font-size: 12px;
  }
  
  .legend__list li {
    font-size: 11px;
  }
}

/* iPhone 12/13/14 Series (390px - 428px) */
@media (min-width: 390px) and (max-width: 428px) {
  .page {
    padding: 18px 16px 30px;
  }
  
  .brand {
    padding: 14px 20px;
    gap: 12px;
  }
  
  .brand__logo {
    width: 58px;
    height: 58px;
    font-size: 20px;
  }
  
  .brand__title {
    font-size: 20px;
  }
  
  .card {
    padding: 20px;
  }
  
  .metric__value {
    font-size: 40px;
  }
  
  .message {
    font-size: 13px;
  }
}

/* iPhone 12/13/14 Pro Max (428px - 480px) */
@media (min-width: 428px) and (max-width: 480px) {
  .page {
    padding: 20px 18px 34px;
  }
  
  .brand__title {
    font-size: 22px;
  }
  
  .card {
    padding: 22px;
  }
  
  .metric__value {
    font-size: 44px;
  }
}

/* iPad Pro 11 inch (834px - 834px portrait) */
@media (width: 834px) and (orientation: portrait) {
  .page {
    padding: 32px 40px 56px;
    max-width: 700px;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .card {
    padding: 32px;
  }
  
  .brand {
    padding: 20px 28px;
  }
  
  .brand__logo {
    width: 72px;
    height: 72px;
    font-size: 26px;
  }
  
  .brand__title {
    font-size: 26px;
  }
  
  .brand__subtitle {
    font-size: 14px;
  }
  
  .metric__value {
    font-size: 56px;
  }
  
  .form {
    gap: 24px;
  }
  
  input {
    padding: 18px 20px;
  }
  
  .btn {
    padding: 18px 32px;
  }
  
  .actions {
    gap: 16px;
  }
}

/* iPad Pro 12.9 inch (1024px - 1024px landscape) */
@media (width: 1024px) and (orientation: landscape) {
  .page {
    padding: 32px 48px 56px;
    max-width: 1000px;
  }
  
  .grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
  }
  
  .card {
    padding: 36px;
  }
  
  .brand {
    padding: 16px 24px;
  }
  
  .brand__logo {
    width: 68px;
    height: 68px;
    font-size: 24px;
  }
  
  .brand__title {
    font-size: 26px;
  }
  
  .metric__value {
    font-size: 64px;
  }
}

/* ========================================
   SAFE AREA - PERANGKAT BERPUTI (NOTCH)
   ======================================== */

/* iPhone X, XS, 11 Pro, 12, 13, 14 Series dengan Notch */
@supports (padding: max(0px)) {
  @media (orientation: portrait) {
    .page {
      padding-left: max(16px, env(safe-area-inset-left));
      padding-right: max(16px, env(safe-area-inset-right));
      padding-bottom: max(32px, env(safe-area-inset-bottom));
    }
    
    .header {
      padding-top: max(12px, env(safe-area-inset-top));
    }
  }
  
  @media (orientation: landscape) {
    .page {
      padding-left: max(24px, env(safe-area-inset-left));
      padding-right: max(24px, env(safe-area-inset-right));
      padding-top: max(8px, env(safe-area-inset-top));
      padding-bottom: max(24px, env(safe-area-inset-bottom));
    }
  }
}

/* Safe area untuk Android dengan punch hole camera */
@media (max-width: 480px) and (orientation: portrait) {
  .page {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
}

/* ========================================
   ORIENTATION - LANDSCAPE MODE
   ======================================== */

/* Mobile Landscape */
@media (max-width: 812px) and (orientation: landscape) {
  .page {
    padding: 12px 24px 20px;
  }
  
  .header {
    padding: 8px 0 16px;
  }
  
  .brand {
    padding: 8px 16px;
    gap: 10px;
    flex-direction: row;
    max-width: 600px;
    margin: 0 auto;
  }
  
  .brand__logo {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }
  
  .brand__text {
    text-align: left;
  }
  
  .brand__title {
    font-size: 16px;
    margin: 0;
  }
  
  .brand__subtitle {
    display: none;
  }
  
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  
  .card {
    padding: 16px;
  }
  
  .card__title {
    font-size: 14px;
    margin-bottom: 4px;
  }
  
  .card__hint {
    font-size: 11px;
    margin-bottom: 12px;
  }
  
  .form {
    gap: 12px;
  }
  
  .field {
    gap: 4px;
  }
  
  .label {
    font-size: 11px;
  }
  
  input {
    padding: 10px 12px;
    font-size: 14px;
  }
  
  .field__meta {
    display: none;
  }
  
  .actions {
    flex-direction: row;
    gap: 8px;
    margin-top: 4px;
  }
  
  .btn {
    padding: 10px 16px;
    font-size: 12px;
  }
  
  .metric__value {
    font-size: 32px;
  }
  
  .message {
    font-size: 11px;
    padding: 8px;
  }
  
  .note {
    font-size: 10px;
  }
  
  .legend {
    padding: 12px;
    margin-top: 16px;
  }
  
  .legend__title {
    font-size: 12px;
    margin-bottom: 8px;
  }
  
  .legend__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .legend__list li {
    font-size: 10px;
  }
  
  .legend__small {
    display: none;
  }
}

/* Tablet Landscape */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
  .page {
    padding: 20px 32px 36px;
  }
  
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  
  .brand {
    padding: 12px 20px;
    gap: 14px;
  }
  
  .brand__logo {
    width: 56px;
    height: 56px;
    font-size: 20px;
  }
  
  .brand__title {
    font-size: 22px;
  }
  
  .brand__subtitle {
    font-size: 12px;
  }
  
  .card {
    padding: 24px;
  }
  
  .metric__value {
    font-size: 48px;
  }
  
  .message {
    font-size: 13px;
  }
}

/* ========================================
   TOUCH OPTIMIZATIONS
   ======================================== */

/* Touch optimizations for mobile */
@media (hover: none) and (pointer: coarse) {
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .btn--primary:hover {
    transform: none;
  }
  
  .btn--ghost:hover {
    transform: none;
  }
  
  input:hover:not(:focus) {
    border-color: rgba(148, 163, 184, 0.3);
    background: rgba(255, 255, 255, 0.6);
  }
  
  /* Larger touch targets */
  input {
    min-height: 52px;
  }
  
  .btn {
    min-height: 52px;
  }
  
  /* Disable hover effects on touch */
  .brand__logo::after {
    display: none;
  }
  
  .btn--primary::before {
    display: none;
  }
}

/* Active state untuk touch */
@media (hover: none) and (pointer: coarse) {
  .btn:active {
    transform: scale(0.95);
  }
  
  .btn--primary:active {
    transform: scale(0.95);
  }
  
  .btn--ghost:active {
    transform: scale(0.95);
  }
}

/* ========================================
   PERANGKAT DENGAN POINTER HALUS
   ======================================== */

/* Mouse/Trackpad users - enhance hover states */
@media (hover: hover) and (pointer: fine) {
  .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
  }
  
  .card:hover::before {
    opacity: 1;
  }
  
  .btn--primary:hover {
    box-shadow: 0 12px 28px var(--primary-glow), var(--shadow-lg);
    transform: translateY(-2px);
  }
  
  .btn--ghost:hover {
    background: white;
    color: var(--text);
    border-color: var(--text-light);
    transform: translateY(-2px);
  }
  
  .brand__logo:hover {
    transform: scale(1.05);
  }
}

/* ========================================
   DARK MODE SUPPORT (OPSIONAL)
   ======================================== */

/* Dark mode for systems that prefer dark scheme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-pattern: 
      radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
      radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
      radial-gradient(circle at 40% 40%, rgba(244, 63, 94, 0.06) 0%, transparent 40%);
    
    --card: rgba(30, 41, 59, 0.85);
    --card-glass: rgba(30, 41, 59, 0.7);
    --card-border: rgba(71, 85, 105, 0.5);
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --text-light: #64748b;
  }
  
  input {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(71, 85, 105, 0.4);
    color: var(--text);
  }
  
  input:focus {
    background: rgba(15, 23, 42, 0.9);
  }
  
  .btn--ghost {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(71, 85, 105, 0.4);
    color: var(--text-muted);
  }
  
  .btn--ghost:hover {
    background: rgba(30, 41, 59, 0.9);
    color: var(--text);
  }
  
  .result {
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.8) 100%);
  }
  
  .mono {
    background: rgba(79, 70, 229, 0.1);
    border-color: rgba(79, 70, 229, 0.2);
  }
  
  .legend {
    background: rgba(30, 41, 59, 0.5);
  }
}

/* ========================================
   HIGH CONTRAST MODE
   ======================================== */

@media (prefers-contrast: high) {
  :root {
    --card-border: rgba(0, 0, 0, 0.5);
    --text-muted: #334155;
    --text-light: #475569;
  }
  
  .card {
    border-width: 2px;
  }
  
  input {
    border-width: 2px;
  }
  
  .btn {
    border-width: 2px;
  }
  
  .result {
    border-width: 2px;
  }
  
  .legend {
    border-width: 2px;
  }
}

/* ========================================
   REDUCED MOTION
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .card {
    animation: none;
  }
  
  .result {
    animation: none;
  }
  
  .brand__logo::after {
    display: none;
  }
  
  .btn--primary::before {
    display: none;
  }
}

/* Animations */
@keyframes fadeInUp {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes scaleIn {
  from { 
    opacity: 0; 
    transform: scale(0.95); 
  }
  to { 
    opacity: 1; 
    transform: scale(1); 
  }
}

.card {
  animation: fadeInUp 0.5s ease backwards;
}

.card:nth-child(2) {
  animation-delay: 0.15s;
}

.result {
  animation: scaleIn 0.4s ease;
}

.result.result--empty {
  animation: fadeInUp 0.5s ease;
}