:root {
  /* New Portfolio Color System */
  --portfolio-deep: #0c070f;
  --portfolio-dark: #150a1a;
  --portfolio-base: #1a0f20;
  --portfolio-medium: #2a1530;
  --portfolio-accent: #3a2540;
  --portfolio-gradient-1: #4a2560;
  --portfolio-gradient-2: #5a3570;
  --portfolio-gradient-3: #6a3590;
  --portfolio-gradient-4: #7a45a0;
  --portfolio-text: #c8b8d8;
  --portfolio-text-light: #e0d0f0;
  --portfolio-light: #cdb7e4;
  --portfolio-orange: #e7762b;

  /* Color system mapping */
  --color-primary: var(--portfolio-text);
  --color-background: var(--portfolio-base);
  --color-accent: var(--portfolio-orange);
  --color-surface: rgba(74, 37, 96, 0.15);
  --color-border: var(--portfolio-accent);

  /* Spacing system - Mobile first */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.25rem;
  --space-2xl: 1.5rem;

  /* Typography - Mobile first */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 0.9rem;
  --font-size-lg: 1rem;
  --font-size-xl: 1.1rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(12, 7, 15, 0.25);
  --shadow-md: 0 4px 6px rgba(12, 7, 15, 0.35);
  --shadow-lg: 0 10px 15px rgba(12, 7, 15, 0.45);

  /* Transitions */
  --transition-base: all 0.2s ease-in-out;
  --transition-slow: all 0.3s ease-in-out;

  /* Legacy aliases for compatibility */
  --lettersC: var(--color-primary);
  --bckGrnd: var(--color-background);
}

body.light-mode {
  --color-primary: var(--portfolio-deep);
  --color-background: var(--portfolio-light);
  --color-accent: var(--portfolio-gradient-4);
  --color-surface: rgba(26, 15, 32, 0.08);
  --color-border: var(--portfolio-medium);

  --shadow-sm: 0 1px 3px rgba(26, 15, 32, 0.15);
  --shadow-md: 0 4px 6px rgba(26, 15, 32, 0.20);
  --shadow-lg: 0 10px 15px rgba(26, 15, 32, 0.25);

  --lettersC: var(--color-primary);
  --bckGrnd: var(--color-background);
}

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

body,
html {
  font-family: "Kanit", sans-serif;
  font-size: var(--font-size-base);
  letter-spacing: 0.1em;
  background: var(--color-background);
  color: var(--color-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: var(--transition-slow);
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, var(--portfolio-dark), var(--portfolio-medium));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--portfolio-accent);
  transition: var(--transition-slow);
  min-height: 3rem;
  box-shadow: var(--shadow-md);
}

.navbar h1 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
  color: var(--portfolio-text-light);
  text-shadow: 0 1px 2px rgba(12, 7, 15, 0.5);
}

#toggle-mode {
  font-size: var(--font-size-lg);
  color: var(--portfolio-text-light);
  background: linear-gradient(135deg, var(--portfolio-gradient-1), var(--portfolio-gradient-3));
  border: 1px solid var(--portfolio-accent);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  min-width: 2rem;
  min-height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

#toggle-mode:hover {
  background: linear-gradient(135deg, var(--portfolio-gradient-2), var(--portfolio-gradient-4));
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

#toggle-mode:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

#toggle-mode:hover {
  background: var(--color-surface);
  transform: scale(1.1);
}

#toggle-mode:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  min-height: 100vh;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  padding: calc(3.5rem + var(--space-xs)) var(--space-xs) 3.5rem;
  gap: var(--space-md);
}

.form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  min-width: 0;
  min-height: 260px;
  padding: var(--space-md);
  gap: var(--space-sm);
  background: linear-gradient(135deg, var(--portfolio-dark), var(--portfolio-medium));
  backdrop-filter: blur(10px);
  border: 1px solid var(--portfolio-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-slow);
}

.form:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--portfolio-gradient-2);
}

.form label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--portfolio-text-light);
  margin-bottom: var(--space-xs);
}

.form input[type="text"] {
  font-family: inherit;
  font-size: var(--font-size-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--portfolio-base);
  color: var(--portfolio-text);
  border: 1px solid var(--portfolio-accent);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition-base);
  min-height: 2rem;
  max-height: 2.2rem;
}

.form input[type="text"]::placeholder {
  color: rgba(231, 206, 175, 0.6);
  opacity: 0.7;
}

input[type="file"] {
  display: none;
}

.file-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--portfolio-gradient-1), var(--portfolio-gradient-2));
  color: var(--portfolio-text-light);
  border: 1px solid var(--portfolio-gradient-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
  min-height: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.file-label:hover {
  background: linear-gradient(135deg, var(--portfolio-gradient-2), var(--portfolio-gradient-4));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.file-label:focus-within {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn {
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--color-accent), #ff8c42);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn:hover {
  background: linear-gradient(135deg, #ff8c42, var(--color-accent));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:focus {
  outline: 2px solid var(--portfolio-text-light);
  outline-offset: 2px;
}

.btn:hover {
  background: var(--color-primary);
  color: var(--color-background);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.container_qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 260px;
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--portfolio-dark), var(--portfolio-medium));
  backdrop-filter: blur(10px);
  border: 1px solid var(--portfolio-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  gap: var(--space-sm);
  transition: var(--transition-slow);
  z-index: 1;
}

.container_qr:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--portfolio-gradient-2);
}

.container_qr canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
}

.qr_logo {
  position: absolute;
  display: inline-block;
  top: 44%;
  left: 51%;
  width: 25%;
  max-width: 25%;
  aspect-ratio: 1/1;
  height: auto;
  transform: translate(-50%, -50%);
  border-radius: var(--radius-full);
  object-fit: contain;
  /* border: 3px solid #1a0f20; */
  background: linear-gradient(135deg, var(--portfolio-dark), var(--portfolio-medium));
  box-shadow:
    0 2px 8px 0 #0000002e,
    0 0 0 2px #1a0f204d inset,
    0 0 0 6px #1a0f2033 inset,
    0 0 0 10px #1a0f201a inset;
  z-index: 2;
  transition: var(--transition-base);
  animation: logoAppear 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  pointer-events: none;
}

@keyframes logoAppear {
  0% {
    transform: translate(-50%, -50%) scale(0.3);
    opacity: 0;
  }

  70% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 1;
  }

  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}

.qr_logo_hidden {
  display: none !important;
}

.download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: linear-gradient(135deg, var(--portfolio-gradient-2), var(--portfolio-gradient-3));
  color: var(--portfolio-text-light);
  border: 1px solid var(--portfolio-gradient-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  min-height: 2.5rem;
  text-shadow: 0 1px 2px rgba(12, 7, 15, 0.5);
}

.download:hover {
  background: linear-gradient(135deg, var(--portfolio-gradient-3), var(--portfolio-gradient-4));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.download:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.download:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.download svg.action-btn,
.download i.action-btn {
  font-size: var(--font-size-lg);
}

.download:hover {
  background: var(--color-primary);
  color: var(--color-background);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.download:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.download:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.download svg.action-btn,
.download i.action-btn {
  font-size: var(--font-size-lg);
}

.share {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  width: 100%;
  padding: var(--space-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: linear-gradient(135deg, var(--portfolio-gradient-1), var(--portfolio-gradient-4));
  color: var(--portfolio-text-light);
  border: 1px solid var(--portfolio-gradient-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  min-height: 2.5rem;
  text-shadow: 0 1px 2px rgba(12, 7, 15, 0.5);
  margin-top: var(--space-xs);
}

.share:hover {
  background: linear-gradient(135deg, var(--portfolio-gradient-4), var(--portfolio-gradient-2));
  color: var(--color-background);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.share:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.share:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.share svg,
.share i {
  font-size: var(--font-size-lg);
}

/* Footer - Mobile first */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, var(--portfolio-dark), var(--portfolio-medium));
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--portfolio-accent);
  color: var(--portfolio-text);
  text-align: center;
  font-size: var(--font-size-sm);
  z-index: 50;
  transition: var(--transition-slow);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 -4px 6px rgba(12, 7, 15, 0.35);
}

footer a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-base);
  margin-left: .5em;
}

footer a:hover {
  color: var(--portfolio-text-light);
  text-decoration: underline;
}

footer a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media screen and (min-width: 768px) {
  .container {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    height: 100vh;
    max-width: 700px;
    min-height: 80vh;
    padding: calc(4rem + var(--space-md)) var(--space-lg) 3.5rem;
    gap: var(--space-lg);
  }

  .form,
  .container_qr {
    min-width: 320px;
    max-width: 340px;
    min-height: 320px;
    padding: var(--space-lg);
    justify-content: center;
  }

  .form label {
    font-size: var(--font-size-sm);
  }

  .form input[type="text"] {
    font-size: var(--font-size-base);
    min-height: 2.2rem;
    max-height: 2.5rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible support */
@supports selector(:focus-visible) {
  *:focus {
    outline: none;
  }

  *:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }
}

/* Utility classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading state */
.loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top: 2px solid var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* Print styles */
@media print {

  .navbar,
  footer,
  .form {
    display: none;
  }

  .container_qr {
    box-shadow: none;
    border: 1px solid #000;
    background: white;
  }
}