/* ============================================================
   _buttons.css — Buttons
   Base .btn + variants. No @keyframes (all in _animations.css).
   Usage: <button class="btn btn-primary">Text</button>
   ============================================================ */

/* ── Base button ── */
.btn {
  --btn-gradient-from: var(--color-primary);
  --btn-gradient-to: var(--color-accent);
  --btn-gradient-text: #fff;
  --btn-gradient-color: var(--color-primary);
  --btn-gradient-color-soft: var(--color-primary-opacity);
  --btn-gradient-shadow: var(--color-primary-opacity);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-6);
  height: 48px;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: 700;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
  user-select: none;
}
.btn:disabled,
.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Sizes ── */
.btn-xs  { height: 28px; padding: 0 var(--space-3); font-size: var(--fs-xs); }
.btn-sm  { height: 36px; padding: 0 var(--space-4); font-size: var(--fs-sm); }
.btn-md  { height: 48px; padding: 0 var(--space-6); font-size: var(--fs-base); }
.btn-lg  { height: 56px; padding: 0 var(--space-8); font-size: var(--fs-lg); }
.btn-xl  { height: 64px; padding: 0 var(--space-10); font-size: var(--fs-xl); }
.btn-2xl { height: 72px; padding: 0 var(--space-12); font-size: var(--fs-2xl); }

.btn-wide  { width: 100%; }
.btn-block { display: flex; width: 100%; }

/* ── Color variants ── */
.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  filter: brightness(1.12);
  transform: scale(1.03);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}
.btn-accent:hover {
  filter: brightness(1.12);
  transform: scale(1.03);
}

.btn-success {
  background-color: var(--color-success);
  color: #111;
  border-color: var(--color-success);
}
.btn-success:hover {
  filter: brightness(1.12);
  transform: scale(1.03);
}

.btn-error {
  background-color: var(--color-error);
  color: #ffffff;
  border-color: var(--color-error);
}
.btn-error:hover {
  filter: brightness(1.12);
  transform: scale(1.03);
}

.btn-warning {
  background-color: var(--color-warning);
  color: #111;
  border-color: var(--color-warning);
}
.btn-warning:hover {
  filter: brightness(1.12);
  transform: scale(1.03);
}

.btn-dark {
  background-color: var(--color-neutral-900);
  color: #ffffff;
  border-color: var(--color-neutral-700);
}
.btn-dark:hover {
  filter: brightness(1.18);
  transform: scale(1.03);
}

.btn-light {
  background-color: var(--color-neutral-100);
  color: #111;
  border-color: var(--color-neutral-200);
}
.btn-light:hover {
  filter: brightness(0.94);
  transform: scale(1.03);
}

/* ── Outline variants ── */
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-outline-accent {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline-accent:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn-outline-white {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

/* ── Ghost (transparent) ── */
.btn-ghost {
  background: transparent;
  color: var(--color-light);
  border-color: transparent;
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
}

.btn-ghost-primary {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
}
.btn-ghost-primary:hover {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
}

.btn-ghost-accent {
  background: transparent;
  color: var(--color-accent);
  border-color: transparent;
}
.btn-ghost-accent:hover {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.btn-ghost-success {
  background: transparent;
  color: var(--color-success);
  border-color: transparent;
}
.btn-ghost-success:hover {
  background: color-mix(in srgb, var(--color-success) 12%, transparent);
}

.btn-ghost-error {
  background: transparent;
  color: var(--color-error);
  border-color: transparent;
}
.btn-ghost-error:hover {
  background: color-mix(in srgb, var(--color-error) 12%, transparent);
}

.btn-ghost-warning {
  background: transparent;
  color: var(--color-warning);
  border-color: transparent;
}
.btn-ghost-warning:hover {
  background: color-mix(in srgb, var(--color-warning) 12%, transparent);
}

/* ── Gradient variants ── */
.btn-gradient {
  background: linear-gradient(90deg, var(--btn-gradient-from), var(--btn-gradient-to));
  color: var(--btn-gradient-text);
  border: none;
}
.btn-gradient:hover {
  background: linear-gradient(90deg, var(--btn-gradient-to), var(--btn-gradient-from));
  transform: scale(1.03);
  box-shadow: 0 10px 30px color-mix(in srgb, var(--btn-gradient-to) 32%, transparent);
}

.btn-gradient-primary-accent { --btn-gradient-from: var(--color-primary); --btn-gradient-to: var(--color-accent); }
.btn-gradient-primary-success { --btn-gradient-from: var(--color-primary); --btn-gradient-to: var(--color-success); }
.btn-gradient-primary-error { --btn-gradient-from: var(--color-primary); --btn-gradient-to: var(--color-error); }
.btn-gradient-primary-warning { --btn-gradient-from: var(--color-primary); --btn-gradient-to: var(--color-warning); }
.btn-gradient-accent-success { --btn-gradient-from: var(--color-accent); --btn-gradient-to: var(--color-success); }
.btn-gradient-accent-error { --btn-gradient-from: var(--color-accent); --btn-gradient-to: var(--color-error); }
.btn-gradient-accent-warning { --btn-gradient-from: var(--color-accent); --btn-gradient-to: var(--color-warning); }
.btn-gradient-success-error { --btn-gradient-from: var(--color-success); --btn-gradient-to: var(--color-error); }
.btn-gradient-success-warning { --btn-gradient-from: var(--color-success); --btn-gradient-to: var(--color-warning); --btn-gradient-text: #111; }
.btn-gradient-error-warning { --btn-gradient-from: var(--color-error); --btn-gradient-to: var(--color-warning); }

.btn-gradient-hover {
  position: relative;
  color: var(--btn-gradient-text);
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--btn-gradient-color), var(--btn-gradient-color-soft), var(--btn-gradient-color-soft), var(--btn-gradient-color));
  box-shadow: 0 -10px 8px 0 rgba(0,0,0,0.25) inset, 0 0 20px 0 var(--btn-gradient-shadow);
  background-size: 400%;
  border-radius: var(--radius-full);
  z-index: 1;
  animation: animateGradient 18s linear infinite;
  transition: var(--ease);
  height: 50px;
}
.btn-gradient-hover:hover {
  background: linear-gradient(90deg, var(--btn-gradient-color-soft), var(--btn-gradient-color), var(--btn-gradient-color), var(--btn-gradient-color-soft));
  animation: animateGradient 8s linear infinite;
  transform: translateY(-4px) scale(1.04);
  filter: brightness(1.15) saturate(1.1);
  box-shadow: 0 -10px 8px 0 rgba(0,0,0,0.25) inset, 0 8px 32px 0 var(--btn-gradient-shadow);
}
.btn-gradient-hover:active {
  transform: translateY(-1px) scale(1.01);
  filter: brightness(1.05);
}
.btn-gradient-hover::before {
  content: "";
  position: absolute;
  top: -5px; right: -5px; bottom: -5px; left: -5px;
  z-index: -1;
  background: linear-gradient(90deg, var(--btn-gradient-color-soft), var(--btn-gradient-color), var(--btn-gradient-color), var(--btn-gradient-color-soft));
  background-size: 400%;
  border-radius: var(--radius-xl);
  opacity: 0;
  transition: var(--ease-slow);
}
.btn-gradient-hover:hover::before {
  filter: blur(20px);
  opacity: 1;
  animation: animateGradient 8s linear infinite;
}

.btn-gradient-hover-primary {
  --btn-gradient-color:      var(--color-primary);
  --btn-gradient-color-soft: color-mix(in oklch, var(--color-primary) 65%, #fff);
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.btn-gradient-hover-accent {
  --btn-gradient-color:      var(--color-accent);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary));
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-accent) 40%, transparent);
}
.btn-gradient-hover-success {
  --btn-gradient-color:      var(--color-success);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-success) 55%, var(--color-primary));
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-success) 40%, transparent);
  --btn-gradient-text:       #111;
}
.btn-gradient-hover-error {
  --btn-gradient-color:      var(--color-error);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-error) 55%, var(--color-accent));
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-error) 40%, transparent);
}
.btn-gradient-hover-warning {
  --btn-gradient-color:      var(--color-warning);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-warning) 55%, var(--color-error));
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-warning) 40%, transparent);
  --btn-gradient-text:       #111;
}
.btn-gradient-hover-fire {
  --btn-gradient-color:      var(--color-error);
  --btn-gradient-color-soft: var(--color-warning);
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-error) 40%, transparent);
}
.btn-gradient-hover-ocean {
  --btn-gradient-color:      var(--color-primary);
  --btn-gradient-color-soft: var(--color-accent);
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.btn-gradient-hover-nature {
  --btn-gradient-color:      var(--color-success);
  --btn-gradient-color-soft: var(--color-primary);
  --btn-gradient-shadow:     color-mix(in srgb, var(--color-success) 40%, transparent);
  --btn-gradient-text:       #111;
}

/* ── Shine — sweep light streak across button ── */
.btn-shine {
  position: relative;
  overflow: hidden;
  border: none;
  color: var(--btn-gradient-text, #fff);
  background: linear-gradient(to right, var(--btn-gradient-color), var(--btn-gradient-color-soft));
  box-shadow: 0 4px 20px var(--btn-gradient-shadow, transparent);
  transition: box-shadow 0.25s ease, transform 0.25s ease, filter 0.25s ease;
}
.btn-shine::after {
  content: "";
  position: absolute;
  top: -50%; left: -75%;
  width: 50%; height: 200%;
  background: linear-gradient(
    120deg,
    transparent 0%,
    color-mix(in srgb, #fff 28%, transparent) 50%,
    transparent 100%
  );
  transform: skewX(-20deg);
  animation: shineSweep 3.5s ease-in-out infinite;
}
.btn-shine:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow:
    0 8px 24px var(--btn-gradient-shadow, transparent),
    0 0 40px var(--btn-gradient-shadow, transparent);
  filter: brightness(1.18) saturate(1.15);
}
.btn-shine:hover::after {
  animation-duration: 0.8s;
}
.btn-shine:active {
  transform: translateY(-1px) scale(1.01);
  filter: brightness(1.05);
}

@keyframes shineShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes shineSweep {
  0%   { left: -75%; }
  60%  { left: 125%; }
  100% { left: 125%; }
}

.btn-shine-primary {
  --btn-gradient-color:      var(--color-primary);
  --btn-gradient-color-soft: color-mix(in oklch, var(--color-primary) 65%, #fff);
}
.btn-shine-accent {
  --btn-gradient-color:      var(--color-accent);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-accent) 55%, var(--color-primary));
}
.btn-shine-success {
  --btn-gradient-color:      var(--color-success);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-success) 55%, var(--color-primary));
  --btn-gradient-text:       #111;
}
.btn-shine-error {
  --btn-gradient-color:      var(--color-error);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-error) 55%, var(--color-accent));
}
.btn-shine-warning {
  --btn-gradient-color:      var(--color-warning);
  --btn-gradient-color-soft: color-mix(in srgb, var(--color-warning) 55%, var(--color-error));
  --btn-gradient-text:       #111;
}
.btn-shine-fire {
  --btn-gradient-color:      var(--color-error);
  --btn-gradient-color-soft: var(--color-warning);
}
.btn-shine-ocean {
  --btn-gradient-color:      var(--color-primary);
  --btn-gradient-color-soft: var(--color-accent);
}
.btn-shine-nature {
  --btn-gradient-color:      var(--color-success);
  --btn-gradient-color-soft: var(--color-primary);
  --btn-gradient-text:       #111;
}

/* ── Aura — glow halo that blooms on hover ── */
.btn-aura {
  position: relative;
  border: none;
  color: var(--aura-text, #fff);
  background: var(--aura-bg);
  z-index: 1;
  transition: transform 0.3s ease, filter 0.3s ease;
}
.btn-aura::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: inherit;
  background: var(--aura-glow);
  filter: blur(18px);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.35s ease, filter 0.35s ease;
}
.btn-aura:hover {
  transform: translateY(-3px) scale(1.04);
  filter: brightness(1.12);
}
.btn-aura:hover::before {
  opacity: 0.85;
  filter: blur(24px);
}
.btn-aura:active {
  transform: translateY(0) scale(1.01);
}

.btn-aura-sunset {
  --aura-bg:   linear-gradient(135deg, #ff6b35, #f72585);
  --aura-glow: linear-gradient(135deg, #ff6b35, #f72585);
}
.btn-aura-aurora {
  --aura-bg:   linear-gradient(135deg, #06d6a0, #118ab2, #8338ec);
  --aura-glow: linear-gradient(135deg, #06d6a0, #8338ec);
}
.btn-aura-cosmic {
  --aura-bg:   linear-gradient(135deg, #3a0ca3, #7209b7, #f72585);
  --aura-glow: linear-gradient(135deg, #7209b7, #f72585);
}
.btn-aura-candy {
  --aura-bg:   linear-gradient(135deg, #ff85a1, #ffc2d4, #ff85a1);
  --aura-glow: linear-gradient(135deg, #ff85a1, #ffc2d4);
  --aura-text: #6d1a36;
}
.btn-aura-gold {
  --aura-bg:   linear-gradient(135deg, #f59e0b, #fbbf24, #d97706);
  --aura-glow: linear-gradient(135deg, #f59e0b, #fbbf24);
  --aura-text: #1a0a00;
}
.btn-aura-ice {
  --aura-bg:   linear-gradient(135deg, #67e8f9, #38bdf8, #818cf8);
  --aura-glow: linear-gradient(135deg, #38bdf8, #818cf8);
  --aura-text: #0c1a3a;
}

/* ── Glow variants ── */
.btn-glow {
  --btn-glow-color: var(--color-accent);
  --btn-glow-text: #fff;
  background: var(--btn-glow-color);
  color: var(--btn-glow-text);
  border: none;
  box-shadow: 0 0 16px color-mix(in srgb, var(--btn-glow-color) 62%, transparent);
  animation: borderPulse 1000ms infinite ease-out;
}
.btn-glow:hover {
  box-shadow: 0 0 30px color-mix(in srgb, var(--btn-glow-color) 72%, transparent), 0 0 60px color-mix(in srgb, var(--btn-glow-color) 42%, transparent);
  transform: scale(1.03);
}
.btn-glow-primary {
  --btn-glow-color: var(--color-primary);
  --btn-glow-text: #fff;
}
.btn-glow-accent {
  --btn-glow-color: var(--color-accent);
  --btn-glow-text: #fff;
}
.btn-glow-success {
  --btn-glow-color: var(--color-success);
  --btn-glow-text: #111;
}
.btn-glow-error {
  --btn-glow-color: var(--color-error);
  --btn-glow-text: #fff;
}
.btn-glow-warning {
  --btn-glow-color: var(--color-warning);
  --btn-glow-text: #111;
}
.btn-glow-primary,
.btn-glow-accent,
.btn-glow-success,
.btn-glow-error,
.btn-glow-warning {
  background: var(--btn-glow-color);
  color: var(--btn-glow-text);
  border: none;
  box-shadow: 0 0 16px color-mix(in srgb, var(--btn-glow-color) 62%, transparent);
  animation: borderPulse 1000ms infinite ease-out;
}
.btn-glow-primary:hover,
.btn-glow-accent:hover,
.btn-glow-success:hover,
.btn-glow-error:hover,
.btn-glow-warning:hover {
  box-shadow: 0 0 30px color-mix(in srgb, var(--btn-glow-color) 72%, transparent), 0 0 60px color-mix(in srgb, var(--btn-glow-color) 42%, transparent);
  transform: scale(1.03);
}
/* ── Shine / Shimmer ── */
.btn-shine {
  background: linear-gradient(90deg, var(--btn-gradient-color), var(--btn-gradient-color-soft), var(--btn-gradient-color-soft), var(--btn-gradient-color));
  color: var(--btn-gradient-text);
  border: none;
  overflow: hidden;
  box-shadow: 0 0 20px var(--btn-gradient-shadow);
}
/* .btn-shine::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(120deg, rgba(255,255,255,0) 30%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0) 70%);
  transform: skewX(-20deg);
  animation: shine 2.5s cubic-bezier(0.3, 0.6, 0.4, 1) infinite;
} */

/* ── Outline Gradient — border + text both shimmer ── */
.btn-outline-gradient {
  position: relative;
  background: linear-gradient(135deg, var(--og-c1), var(--og-c2), var(--og-c1));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  border: none;
  animation: shineShift 3s ease infinite;
  transition: transform 0.25s ease, filter 0.25s ease;
}
.btn-outline-gradient::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(135deg, var(--og-c1), var(--og-c2), var(--og-c1));
  background-size: 200% 200%;
  animation: shineShift 3s ease infinite;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
}
.btn-outline-gradient:hover {
  transform: translateY(-4px) scale(1.05);
  filter: brightness(1.2) saturate(1.15);
  animation-duration: 1.5s;
}
.btn-outline-gradient:hover::before {
  animation-duration: 1.5s;
}
.btn-outline-gradient:active {
  transform: translateY(-1px) scale(1.01);
}

/* colour variants — single-colour shimmer (colour → light) */
.btn-outline-gradient-primary {
  --og-c1: var(--color-primary);
  --og-c2: color-mix(in oklch, var(--color-primary) 55%, #fff);
}
.btn-outline-gradient-accent {
  --og-c1: var(--color-accent);
  --og-c2: color-mix(in oklch, var(--color-accent) 55%, #fff);
}
.btn-outline-gradient-success {
  --og-c1: var(--color-success);
  --og-c2: color-mix(in oklch, var(--color-success) 55%, #fff);
}
.btn-outline-gradient-error {
  --og-c1: var(--color-error);
  --og-c2: color-mix(in oklch, var(--color-error) 55%, #fff);
}
.btn-outline-gradient-warning {
  --og-c1: var(--color-warning);
  --og-c2: color-mix(in oklch, var(--color-warning) 55%, #fff);
}

/* colour variants — two-colour shimmer */
.btn-outline-gradient-fire {
  --og-c1: var(--color-error);
  --og-c2: var(--color-warning);
}
.btn-outline-gradient-ocean {
  --og-c1: var(--color-primary);
  --og-c2: var(--color-accent);
}
.btn-outline-gradient-nature {
  --og-c1: var(--color-success);
  --og-c2: var(--color-primary);
}

/* ── Gradient-border ── */
.btn-gradient-border {
  color: #ffffff;
  cursor: pointer;
  border-radius: var(--radius-full);
  padding: 15px 20px;
  background-color: #000;
  border: 2px solid transparent;
  position: relative;
}
.btn-bg-effect {
  position: absolute;
  top: -2px; left: -2px;
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  background: linear-gradient(90deg, #ff8038, #ff0099, #00ebeb, #db00ff);
  background-size: 600% 600%;
  border-radius: var(--radius-full);
  animation: animateBorder 4s ease infinite;
  z-index: -1;
  transform: translate(-2px, -2px);
  transition: filter var(--ease-slow);
}
.btn-wrapper-effect { position: relative; }
.btn-wrapper-effect:hover .btn-bg-effect { filter: blur(10px); }

/* ── Rainbow animated ── */
.btn-rainbow {
  background: linear-gradient(270deg, red, orange, yellow, green, blue, indigo, violet);
  background-size: 1400% 1400%;
  animation: rainbowStripes 5s linear infinite;
  color: #fff;
  border: none;
}
.btn-rainbow:hover { transform: scale(1.05); }

/* ── Animated background (multi-color) ── */
.btn-animated-bg {
  background: linear-gradient(-45deg, #ffa63d, #ff3d77, #338aff, #3cf0c5);
  background-size: 600%;
  animation: animateBorder 16s linear infinite;
  color: #fff;
  border: none;
}
.btn-animated-fire {
  background: linear-gradient(-45deg, #ff0000, #ff7300, #fffb00, #ff4500);
  background-size: 600%;
  animation: animateBorder 6s linear infinite;
  color: #fff;
  border: none;
}
.btn-animated-ocean {
  background: linear-gradient(-45deg, #002bff, #00c6ff, #3cf0c5, #0072ff);
  background-size: 600%;
  animation: animateBorder 8s linear infinite;
  color: #fff;
  border: none;
}
.btn-animated-aurora {
  background: linear-gradient(-45deg, #06d6a0, #118ab2, #8338ec, #3a86ff);
  background-size: 600%;
  animation: animateBorder 10s linear infinite;
  color: #fff;
  border: none;
}
.btn-animated-candy {
  background: linear-gradient(-45deg, #f72585, #b5179e, #7209b7, #f72585);
  background-size: 600%;
  animation: animateBorder 7s linear infinite;
  color: #fff;
  border: none;
}
.btn-rainbow-pastel {
  background: linear-gradient(270deg, #ffb3ba, #ffdfba, #ffffba, #baffc9, #bae1ff, #e8baff);
  background-size: 1400% 1400%;
  animation: rainbowStripes 6s linear infinite;
  color: #333;
  border: none;
}

/* ── Color-shift (pulse-on-hover / auto) ── */
.btn-color-shift {
  background: #0045e6;
  color: #fff;
  border: none;
}
.btn-color-shift.pulse { animation: borderPulse 1000ms infinite ease-out, colorShift 10000ms infinite ease-in; }
.btn-color-shift:hover { animation: borderPulse 1000ms infinite ease-out, colorShift 10000ms infinite ease-in; }

/* ── Glow on hover (dark bg) ── */
.btn-glow-hover {
  --glow-bg:       #111;
  --glow-text:     #fff;
  --glow-gradient: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
  --glow-speed:    20s;
  color: var(--glow-text);
  background: var(--glow-bg);
  cursor: pointer;
  position: relative;
  z-index: 0;
  border-radius: var(--radius-md);
  border: none;
  overflow: visible;
}
.btn-glow-hover::before {
  content: "";
  background: var(--glow-gradient);
  position: absolute;
  top: -2px; left: -2px;
  background-size: 400%;
  z-index: -1;
  filter: blur(5px);
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  animation: glowing var(--glow-speed) linear infinite;
  opacity: 0;
  transition: opacity var(--ease);
  border-radius: var(--radius-md);
}
.btn-glow-hover::after {
  z-index: -1; content: "";
  position: absolute; width: 100%; height: 100%;
  background: var(--glow-bg); left: 0; top: 0;
  border-radius: var(--radius-md);
}
.btn-glow-hover:hover::before { opacity: 1; }
.btn-glow-hover:hover { transform: translateY(-2px); }

.btn-glow-hover-fire {
  --glow-gradient: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #ff4500, #ff0000);
  --glow-speed:    8s;
}
.btn-glow-hover-ocean {
  --glow-gradient: linear-gradient(45deg, #002bff, #00c6ff, #3cf0c5, #0072ff, #002bff);
  --glow-speed:    10s;
}
.btn-glow-hover-aurora {
  --glow-gradient: linear-gradient(45deg, #06d6a0, #118ab2, #8338ec, #3a86ff, #06d6a0);
  --glow-speed:    12s;
}
.btn-glow-hover-sunset {
  --glow-gradient: linear-gradient(45deg, #ff6b35, #f72585, #b5179e, #ff6b35);
  --glow-speed:    9s;
}
.btn-glow-hover-gold {
  --glow-gradient: linear-gradient(45deg, #f59e0b, #fbbf24, #f97316, #fbbf24, #f59e0b);
  --glow-speed:    7s;
  --glow-text:     #111;
}

/* ── Gradient presets ── */
.btn-gradient-1 { background: linear-gradient(135deg, #00c6ff, #0072ff); border: none; color: #fff; }
.btn-gradient-1:hover { background: linear-gradient(135deg, #0072ff, #00c6ff); transform: scale(1.03); }
.btn-gradient-2 { background: linear-gradient(45deg, #ff9a9e, #fad0c4); border: none; color: #333; }
.btn-gradient-2:hover { transform: scale(1.02); box-shadow: 0 8px 20px rgba(0,0,0,0.2); }
.btn-gradient-3 { background: linear-gradient(120deg, #a8edea, #fed6e3); border: none; color: #333; }
.btn-gradient-3:hover { box-shadow: 0 0 15px #ffd700; transform: scale(1.05); }
.btn-gradient-4 { background: linear-gradient(135deg, #f7971e, #ffd200); border: none; color: #111; box-shadow: 0 0 10px #ffd200; }
.btn-gradient-4:hover { box-shadow: 0 0 20px #ffd200, 0 0 40px #f7971e; transform: scale(1.03); }
.btn-gradient-5 { background: linear-gradient(135deg, #667eea, #764ba2); border: none; color: #fff; }
.btn-gradient-5:hover { transform: scale(1.03); box-shadow: 0 8px 20px rgba(0,0,0,0.2); }

/* ── Bounce on hover ── */
.btn-bounce:hover { animation: bounce 0.5s; }

/* ── Close button ── */
.btn-close {
  padding: 0;
  background: transparent;
  position: absolute;
  right: -55px;
  top: -70px;
  width: 50px;
  height: 60px;
  border: none;
  cursor: pointer;
}

/* ── Bulma-style buttons ── */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-5);
  height: 40px;
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-neutral-600);
  background: var(--color-dark-secondary);
  color: var(--color-light);
  cursor: pointer;
  transition: all var(--ease);
  text-decoration: none;
}
.button:hover { border-color: var(--color-primary); color: var(--color-primary); }
.button.is-primary  { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.button.is-accent   { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.button.is-success  { background: var(--color-success); border-color: var(--color-success); color: #111; }
.button.is-danger   { background: var(--color-error); border-color: var(--color-error); color: #fff; }
.button.is-warning  { background: var(--color-warning); border-color: var(--color-warning); color: #111; }
.button.is-light    { background: var(--color-neutral-100); border-color: var(--color-neutral-200); color: #111; }
.button.is-dark     { background: var(--color-neutral-900); border-color: var(--color-neutral-700); color: #fff; }
.button.is-outlined { background: transparent; }
.button.is-rounded  { border-radius: var(--radius-full); }
.button.is-small    { height: 28px; padding: 0 var(--space-3); font-size: var(--fs-xs); }
.button.is-medium   { height: 48px; padding: 0 var(--space-6); font-size: var(--fs-lg); }
.button.is-large    { height: 60px; padding: 0 var(--space-8); font-size: var(--fs-xl); }
.button.is-fullwidth{ width: 100%; }
.button.is-loading  { color: transparent !important; pointer-events: none; position: relative; }
.button.is-loading::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: rotateFull 0.6s linear infinite;
}
.button.is-disabled,
.button[disabled] { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.buttons { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.buttons.are-small .button  { height: 28px; font-size: var(--fs-xs); }
.buttons.are-medium .button { height: 48px; font-size: var(--fs-lg); }
.buttons.are-large .button  { height: 60px; font-size: var(--fs-xl); }

/* ── Icon button (square, keeps .btn sizing) ── */
.btn-icon {
  padding: 0;
  width: 48px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}
.btn-icon.btn-xs  { width: 28px; }
.btn-icon.btn-sm  { width: 36px; }
.btn-icon.btn-md  { width: 48px; }
.btn-icon.btn-lg  { width: 56px; }
.btn-icon.btn-xl  { width: 64px; }
.btn-square { border-radius: var(--radius-md) !important; }

/* ── Button Group ── */
.btn-group {
  display: inline-flex;
}
.btn-group .btn {
  border-radius: 0;
  margin-left: -2px;
}
.btn-group .btn:first-child { border-radius: var(--radius-full) 0 0 var(--radius-full); margin-left: 0; }
.btn-group .btn:last-child  { border-radius: 0 var(--radius-full) var(--radius-full) 0; }
.btn-group .btn:only-child  { border-radius: var(--radius-full); }
.btn-group .btn:hover,
.btn-group .btn:focus { position: relative; z-index: 1; }

/* ── Loading state for .btn ── */
.btn-loading {
  color: transparent !important;
  pointer-events: none;
}
.btn-loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: rotateFull 0.65s linear infinite;
}

/* ── Danger / secondary outline ── */
.btn-outline-success {
  background: transparent;
  color: var(--color-success);
  border-color: var(--color-success);
}
.btn-outline-success:hover { background: var(--color-success); color: #111; }

.btn-outline-error {
  background: transparent;
  color: var(--color-error);
  border-color: var(--color-error);
}
.btn-outline-error:hover { background: var(--color-error); color: #fff; }

.btn-outline-warning {
  background: transparent;
  color: var(--color-warning);
  border-color: var(--color-warning);
}
.btn-outline-warning:hover { background: var(--color-warning); color: #111; }

/* ── Soft / Tinted variants ── */
/* Light tinted bg + colored text + colored border — modern muted style */
.btn-soft-primary {
  background: color-mix(in srgb, var(--color-primary) 13%, transparent);
  color: var(--color-primary);
  border-color: color-mix(in srgb, var(--color-primary) 28%, transparent);
}
.btn-soft-primary:hover {
  background: color-mix(in srgb, var(--color-primary) 22%, transparent);
  border-color: color-mix(in srgb, var(--color-primary) 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--color-primary) 22%, transparent);
}

.btn-soft-accent {
  background: color-mix(in srgb, var(--color-accent) 13%, transparent);
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 28%, transparent);
}
.btn-soft-accent:hover {
  background: color-mix(in srgb, var(--color-accent) 22%, transparent);
  border-color: color-mix(in srgb, var(--color-accent) 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.btn-soft-success {
  background: color-mix(in srgb, #22c55e 13%, transparent);
  color: #22c55e;
  border-color: color-mix(in srgb, #22c55e 28%, transparent);
}
.btn-soft-success:hover {
  background: color-mix(in srgb, #22c55e 22%, transparent);
  border-color: color-mix(in srgb, #22c55e 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, #22c55e 20%, transparent);
}

.btn-soft-error {
  background: color-mix(in srgb, #ef4444 13%, transparent);
  color: #ef4444;
  border-color: color-mix(in srgb, #ef4444 28%, transparent);
}
.btn-soft-error:hover {
  background: color-mix(in srgb, #ef4444 22%, transparent);
  border-color: color-mix(in srgb, #ef4444 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, #ef4444 20%, transparent);
}

.btn-soft-warning {
  background: color-mix(in srgb, #f59e0b 13%, transparent);
  color: #f59e0b;
  border-color: color-mix(in srgb, #f59e0b 28%, transparent);
}
.btn-soft-warning:hover {
  background: color-mix(in srgb, #f59e0b 22%, transparent);
  border-color: color-mix(in srgb, #f59e0b 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, #f59e0b 20%, transparent);
}

.btn-soft-info {
  background: color-mix(in srgb, #06b6d4 13%, transparent);
  color: #06b6d4;
  border-color: color-mix(in srgb, #06b6d4 28%, transparent);
}
.btn-soft-info:hover {
  background: color-mix(in srgb, #06b6d4 22%, transparent);
  border-color: color-mix(in srgb, #06b6d4 50%, transparent);
  transform: scale(1.03);
  box-shadow: 0 6px 20px color-mix(in srgb, #06b6d4 20%, transparent);
}

/* ── Glass button ── */
.btn-glass {
  background: color-mix(in srgb, #fff 10%, transparent);
  color: #fff;
  border-color: color-mix(in srgb, #fff 22%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.btn-glass:hover {
  background: color-mix(in srgb, #fff 20%, transparent);
  border-color: color-mix(in srgb, #fff 42%, transparent);
  transform: scale(1.03);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

/* ── Neon button ── */
.btn-neon {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  box-shadow:
    0 0 6px color-mix(in srgb, var(--color-primary) 60%, transparent),
    inset 0 0 6px color-mix(in srgb, var(--color-primary) 12%, transparent);
  text-shadow: 0 0 8px color-mix(in srgb, var(--color-primary) 80%, transparent);
  letter-spacing: 0.5px;
  font-weight: 800;
  transition: box-shadow 0.2s, text-shadow 0.2s, transform var(--ease), background var(--ease);
}
.btn-neon:hover {
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  box-shadow:
    0 0 16px var(--color-primary),
    0 0 40px color-mix(in srgb, var(--color-primary) 50%, transparent),
    inset 0 0 16px color-mix(in srgb, var(--color-primary) 15%, transparent);
  text-shadow: 0 0 14px var(--color-primary);
  transform: scale(1.03);
}

/* ── 3D depth button ── */
.btn-3d {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-bottom: 4px solid color-mix(in srgb, var(--color-primary) 55%, #000);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--color-primary) 40%, #000);
  transform: translateY(0);
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-bottom-width 0.1s ease;
}
.btn-3d:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 color-mix(in srgb, var(--color-primary) 40%, #000);
}
.btn-3d:active {
  transform: translateY(3px);
  box-shadow: none;
  border-bottom-width: 1px;
}

.btn-3d-success {
  background: #22c55e;
  color: #fff;
  border: none;
  border-bottom: 4px solid #16a34a;
  box-shadow: 0 4px 0 #15803d;
  transform: translateY(0);
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-bottom-width 0.1s ease;
}
.btn-3d-success:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #15803d; }
.btn-3d-success:active { transform: translateY(3px); box-shadow: none; border-bottom-width: 1px; }

.btn-3d-error {
  background: #ef4444;
  color: #fff;
  border: none;
  border-bottom: 4px solid #dc2626;
  box-shadow: 0 4px 0 #b91c1c;
  transform: translateY(0);
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-bottom-width 0.1s ease;
}
.btn-3d-error:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #b91c1c; }
.btn-3d-error:active { transform: translateY(3px); box-shadow: none; border-bottom-width: 1px; }

.btn-3d-dark {
  background: var(--color-neutral-800);
  color: #fff;
  border: none;
  border-bottom: 4px solid #000;
  box-shadow: 0 4px 0 #000;
  transform: translateY(0);
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-bottom-width 0.1s ease;
}
.btn-3d-dark:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #000; }
.btn-3d-dark:active { transform: translateY(3px); box-shadow: none; border-bottom-width: 1px; }

/* ── Badge button ── */
.btn-badge-wrap {
  position: relative;
  display: inline-flex;
}
.btn-badge-wrap .btn-dot {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 10px;
  height: 10px;
  background: #ef4444;
  border-radius: 50%;
  border: 2px solid var(--сolor-dark);
}
.btn-badge-wrap .btn-count {
  position: absolute;
  top: -8px;
  right: -8px;
  min-width: 20px;
  height: 20px;
  background: #ef4444;
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--сolor-dark);
  padding: 0 4px;
  line-height: 1;
  font-family: var(--font-sans);
}