/* style.css — OnFoot Link-in-Bio (Red / Black / White) — Next-Level Edition */

/* =================================================
   DESIGN SYSTEM — OnFoot Brand Tokens
   ================================================= */
:root {
  /* ---- Typography ---- */
  --fs-h1:    clamp(1.6rem, 5vw, 2rem);
  --fs-body:  clamp(0.95rem, 2.5vw, 1.125rem);
  --fs-small: 0.875rem;
  --fs-tiny:  0.75rem;
  --fs-btn:   0.95rem;

  /* ---- Spacing ---- */
  --space-xxs: 0.25rem;
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-xxl: 3rem;

  /* ---- OnFoot Brand Colours (Light Theme) ---- */
  --c-primary:       #C62828;
  --c-primary-dark:  #A41E1E;
  --c-secondary:     #1A1A1A;
  --c-bg:            #ffffff;
  --c-text:          #111111;
  --c-text-muted:    rgba(0, 0, 0, 0.55);
  --c-on-gradient:   #ffffff;

  /* Cards */
  --c-card-bg:       rgba(255, 255, 255, 0.88);
  --c-card-bg-solid: #ffffff;
  --c-card-hover:    #f5f0f0;
  --c-card-border:   rgba(255, 255, 255, 0.35);

  /* Shadows */
  --shadow:        0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-lifted: 0 12px 28px rgba(0, 0, 0, 0.18);
  --shadow-neu:    4px 8px 12px rgba(0, 0, 0, 0.1),
                  -4px -4px 12px rgba(255, 255, 255, 0.3);

  /* Misc */
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-full: 50%;
  --transition:  0.25s ease;
  --focus-ring:  3px solid var(--c-primary);
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
  --c-primary:       #EF5350;
  --c-primary-dark:  #E53935;
  --c-bg:            #0d0d0d;
  --c-text:          #f0f0f0;
  --c-text-muted:    rgba(255, 255, 255, 0.6);
  --c-on-gradient:   #ffffff;

  --c-card-bg:       rgba(255, 255, 255, 0.06);
  --c-card-bg-solid: #1a1a1a;
  --c-card-hover:    #2a2222;
  --c-card-border:   rgba(255, 255, 255, 0.08);

  --shadow:        0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lifted: 0 14px 32px rgba(0, 0, 0, 0.5);
  --shadow-neu:    4px 8px 12px rgba(0, 0, 0, 0.35),
                  -4px -4px 12px rgba(255, 255, 255, 0.03);
}

/* =================================================
   GLOBAL RESET & BASE
   ================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: var(--fs-body);
  color: var(--c-text);
  background: var(--c-secondary);
  transition: color var(--transition);
  position: relative;
  overflow-x: hidden;
}

/* =================================================
   ANIMATED GRADIENT BACKGROUND
   ================================================= */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  background: linear-gradient(
    135deg,
    var(--c-primary) 0%,
    #8B1A1A 25%,
    var(--c-secondary) 50%,
    #2D0000 75%,
    var(--c-primary) 100%
  );
  background-size: 400% 400%;
  animation: gradientShift 18s ease infinite;
  pointer-events: none;
}

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

/* =================================================
   FOCUS & ACCESSIBILITY
   ================================================= */

/* Skip-to-content link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--c-card-bg-solid);
  color: var(--c-text);
  padding: var(--space-xs) var(--space-md);
  z-index: 1000;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0;
}

/* Universal focus-visible ring */
a:focus-visible,
button:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 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;
    scroll-behavior: auto !important;
  }
}

/* =================================================
   LAYOUT — Container (glassmorphism)
   ================================================= */
.container {
  max-width: 420px;
  width: 100%;
  text-align: center;
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  position: relative;
  z-index: 1;

  /* Glassmorphism */
  background: var(--c-card-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--c-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-strong);

  animation: fadeIn 0.8s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =================================================
   BRANDING — OnFoot Logo & Bio
   ================================================= */
.logo {
  max-width: 200px;
  width: 100%;
  height: auto;
  object-fit: contain;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--fs-h1);
  font-weight: 700;
  margin-bottom: var(--space-xxs);
  color: var(--c-on-gradient);
}

.bio {
  font-size: var(--fs-small);
  line-height: 1.5;
  opacity: 0.9;
  margin-bottom: var(--space-lg);
  color: var(--c-on-gradient);
}

/* =================================================
   DARK-MODE TOGGLE
   ================================================= */
.theme-toggle {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--c-card-bg-solid);
  color: var(--c-text);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  transition: background var(--transition), transform var(--transition),
              box-shadow var(--transition);
  /* Ripple container */
  position: absolute;
  overflow: hidden;
}
.theme-toggle:hover {
  background: var(--c-card-hover);
  transform: scale(1.08);
}

/* Pulse on first load */
body:not([data-theme-set]) .theme-toggle {
  animation: pulse 1.2s ease-out;
}
@keyframes pulse {
  0%   { transform: scale(1);    }
  50%  { transform: scale(1.12); }
  100% { transform: scale(1);    }
}

/* =================================================
   FOCUS-MODE TOGGLE
   ================================================= */
.focus-toggle {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--c-card-bg-solid);
  color: var(--c-text);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  transition: background var(--transition), transform var(--transition);
  overflow: hidden;
}
.focus-toggle:hover {
  background: var(--c-card-hover);
  transform: scale(1.08);
}
.focus-toggle.active {
  background: var(--c-primary);
  color: #fff;
}

/* Focus-mode: dim all cards except hovered */
.focus-mode .card {
  opacity: 0.4;
  filter: grayscale(0.5);
}
.focus-mode .card:hover,
.focus-mode .card:focus-within {
  opacity: 1;
  filter: none;
}

/* =================================================
   TOOLBAR (share + focus)
   ================================================= */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

/* =================================================
   SHARE BUTTON
   ================================================= */
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: transparent;
  color: var(--c-on-gradient);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--fs-small);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.share-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
}

.share-btn .btn-icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
  filter: invert(1);
}

/* =================================================
   LINK CARDS (scroll-reveal + image icons)
   ================================================= */
.card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--fs-btn);
  padding: var(--space-md) var(--space-lg);
  padding-right: 2.8rem;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  color: var(--c-text);
  background: var(--c-card-bg-solid);
  box-shadow: var(--shadow-neu);
  border: 1px solid var(--c-card-border);
  will-change: transform, opacity;
  transition: transform 0.2s ease, background var(--transition),
              box-shadow 0.2s ease, opacity 0.5s ease, filter 0.3s ease;

  /* Scroll-reveal: start hidden */
  opacity: 0;
  transform: translateY(16px);
}

/* Scroll-reveal: visible state */
.card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hover: 3-D lift */
.card.visible:hover {
  transform: translateY(-4px) scale(1.02);
  background: var(--c-card-hover);
  box-shadow: var(--shadow-lifted);
}
.card:active {
  transform: translateY(0) scale(0.98) !important;
}

/* Card image icons */
.card .card-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: 6px;
}

.card .text {
  flex: 1;
  text-align: left;
}

/* External link indicator */
.card .ext-icon {
  font-size: 0.7rem;
  opacity: 0;
  margin-left: var(--space-xxs);
  color: var(--c-text-muted);
  transition: opacity var(--transition);
  vertical-align: middle;
}
.card:hover .ext-icon {
  opacity: 0.7;
}

/* Copy button inside each card */
.copy-btn {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  padding: var(--space-xxs) var(--space-xs);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition), background var(--transition),
              color var(--transition), transform 0.2s;
  color: var(--c-text-muted);
}
.card:hover .copy-btn,
.copy-btn:focus-visible {
  opacity: 1;
}
.copy-btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

/* Copy success animation */
.copy-btn.copied {
  color: #fff;
  background: var(--c-primary);
  opacity: 1;
  animation: copyPulse 0.5s ease-out;
}
@keyframes copyPulse {
  0%   { transform: translateY(-50%) scale(1);   }
  40%  { transform: translateY(-50%) scale(1.25); }
  100% { transform: translateY(-50%) scale(1);   }
}

[data-theme="dark"] .copy-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* =================================================
   QR / CASHAPP BUTTONS (with ripple)
   ================================================= */
.qr-button,
.cashapp-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-sm);
  border: 2px dashed var(--c-card-border);
  border-radius: var(--radius-md);
  background: var(--c-card-bg-solid);
  color: var(--c-text);
  font-family: inherit;
  font-size: var(--fs-btn);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform var(--transition), background var(--transition),
              border-color var(--transition);

  /* Ripple container */
  position: relative;
  overflow: hidden;
}
.qr-button:hover,
.cashapp-button:hover {
  transform: translateY(-1px);
  background: var(--c-card-hover);
  border-color: var(--c-primary);
}

/* Material-design ripple effect */
.qr-button::after,
.cashapp-button::after,
.theme-toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: var(--radius-full);
  background: rgba(198, 40, 40, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease, opacity 0.3s;
  opacity: 0;
  pointer-events: none;
}
.qr-button:active::after,
.cashapp-button:active::after,
.theme-toggle:active::after {
  width: 250px;
  height: 250px;
  opacity: 0.5;
  transition: width 0s, height 0s, opacity 0s;
}

.qr-button .btn-icon,
.cashapp-button .btn-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  object-fit: contain;
}

/* =================================================
   QR PANELS (slide-in + fade)
   ================================================= */
.qr-panel,
.cashapp-panel {
  margin: var(--space-md) 0;
  padding: var(--space-lg);
  background: var(--c-card-bg-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  text-align: center;
  will-change: transform, opacity;

  animation: panelReveal 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes panelReveal {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.qr-panel p,
.cashapp-panel p {
  font-size: var(--fs-small);
  color: var(--c-text-muted);
  margin-bottom: var(--space-sm);
}

.qr-panel canvas,
.cashapp-panel canvas {
  display: block;
  margin: 0 auto var(--space-md);
  border-radius: var(--radius-sm);
}

/* Static CashApp QR image */
.cashapp-qr-img {
  display: block;
  margin: 0 auto var(--space-md);
  border-radius: var(--radius-md);
  max-width: 240px;
  width: 100%;
  height: auto;
}

/* =================================================
   DOWNLOAD / SAVE QR LINKS
   ================================================= */
.download-qr,
.download-cashapp {
  display: inline-block;
  padding: var(--space-xs) var(--space-lg);
  background: var(--c-primary);
  color: #fff;
  text-decoration: none;
  font-size: var(--fs-small);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform 0.15s;
}
.download-qr:hover,
.download-cashapp:hover {
  background: var(--c-primary-dark);
}
.download-qr:active,
.download-cashapp:active {
  transform: scale(0.93);
}

/* =================================================
   TOAST NOTIFICATION
   ================================================= */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--c-card-bg-solid);
  color: var(--c-text);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-strong);
  font-size: var(--fs-small);
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  z-index: 999;
  transition: opacity 0.3s, transform 0.3s;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  animation: toastSlide 0.4s ease-out;
}
@keyframes toastSlide {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* =================================================
   "POWERED BY" BADGE
   ================================================= */
.powered-by {
  display: block;
  margin-top: var(--space-lg);
  font-size: var(--fs-tiny);
  color: var(--c-on-gradient);
  opacity: 0.45;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: opacity var(--transition);
}
.powered-by:hover {
  opacity: 0.75;
}

/* =================================================
   RESPONSIVE FINE-TUNING
   ================================================= */
@media (max-width: 480px) {
  body {
    padding: var(--space-md);
  }
  .container {
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }
  .logo {
    max-width: 160px;
  }
  /* Larger tap targets on mobile */
  .card {
    padding: var(--space-md) var(--space-md);
    min-height: 52px;
  }
}