/* ── Zen Mode Stylesheet ── */

:root {
  --color-bg-deep: hsl(230, 40%, 6%);
  --color-accent-blue: hsl(200, 75%, 55%);
  --color-accent-teal: hsl(175, 70%, 50%);
  --color-accent-purple: hsl(265, 65%, 60%);
  --color-glass-bg: rgba(13, 15, 30, 0.45);
  --color-glass-border: rgba(255, 255, 255, 0.06);
  --color-glass-border-focus: rgba(255, 255, 255, 0.15);
}

/* ── Fullscreen animated gradient mesh background ── */
.ambient-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
  background-color: var(--color-bg-deep);
  transition: filter 1s ease;
}

.mesh-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  mix-blend-mode: screen;
  pointer-events: none;
  transition: transform 10s ease, opacity 2s ease;
}

.blob-indigo {
  width: 600px;
  height: 600px;
  background: var(--color-accent-purple);
  top: -150px;
  right: -100px;
  transform: translate(0, 0);
}

.blob-teal {
  width: 500px;
  height: 500px;
  background: var(--color-accent-teal);
  bottom: -100px;
  left: -100px;
  transform: translate(0, 0);
}

.blob-purple {
  width: 400px;
  height: 400px;
  background: var(--color-accent-blue);
  top: 40%;
  left: 30%;
  transform: translate(0, 0);
  opacity: 0.08;
}

/* Pulsing background when playing */
body.is-playing .blob-indigo {
  animation: float-slow-1 25s infinite alternate ease-in-out;
  opacity: 0.28;
}
body.is-playing .blob-teal {
  animation: float-slow-2 30s infinite alternate ease-in-out;
  opacity: 0.28;
}
body.is-playing .blob-purple {
  animation: float-slow-3 20s infinite alternate ease-in-out;
  opacity: 0.18;
}

@keyframes float-slow-1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, 60px) scale(1.1); }
  100% { transform: translate(50px, -40px) scale(0.95); }
}

@keyframes float-slow-2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, -90px) scale(0.9); }
  100% { transform: translate(-40px, 30px) scale(1.15); }
}

@keyframes float-slow-3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, -30px) scale(1.2); }
  100% { transform: translate(30px, 40px) scale(0.8); }
}

/* ── Container Wrapper ── */
.zen-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 520px;
  margin: 0 auto;
  padding: clamp(1rem, 4vw, 2rem);
  padding-top: max(env(safe-area-inset-top), clamp(1rem, 4vw, 1.5rem));
  padding-bottom: max(env(safe-area-inset-bottom), clamp(1rem, 4vw, 1.5rem));
}

/* ── Header ── */
.zen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.nav-back {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}@media (hover: hover) and (pointer: fine) {


.nav-back:hover {
  background: var(--color-glass-border-focus);
  transform: translateX(-2px);
}
}

.zen-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header-spacer {
  width: 40px;
}

/* ── Main content ── */
.zen-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.zen-section {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: border-color var(--duration-normal) ease;
}@media (hover: hover) and (pointer: fine) {


.zen-section:hover {
  border-color: var(--color-glass-border-focus);
}
}

.section-label {
  font-size: var(--text-xs);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

/* ── Presets Grid ── */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.preset-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-text-primary);
  transition: all var(--duration-fast) ease;
}@media (hover: hover) and (pointer: fine) {


.preset-btn:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.15);
}
}

.preset-btn.active {
  background: rgba(185, 70%, 55%, 0.12);
  border-color: var(--color-accent-teal);
  box-shadow: 0 0 12px rgba(175, 70%, 50%, 0.15);
}

.preset-icon {
  font-size: 1.5rem;
}

.preset-name {
  font-size: 0.75rem;
  font-family: var(--font-display);
  font-weight: 500;
}

/* ── Mixer Sliders ── */
.mixer-section {
  padding: 0;
  overflow: hidden;
}

.mix-sliders {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: 0 var(--space-5) var(--space-5) var(--space-5);
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.slider-info {
  display: flex;
  align-items: center;
  font-size: var(--text-sm);
  font-family: var(--font-display);
}

.sound-emoji {
  margin-right: var(--space-2);
  font-size: 1.1rem;
}

.sound-name {
  font-weight: 500;
  color: var(--color-text-primary);
  flex: 1;
}

.sound-value {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 400;
}

/* ── Custom Range Input Styling ── */
.sound-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
  transition: background var(--duration-fast) ease;
}

.sound-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 6px;
  cursor: pointer;
}

.sound-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-text-primary);
  cursor: pointer;
  transition: transform 150ms var(--ease-bounce), background-color 150ms ease, box-shadow 150ms ease;
  margin-top: -6px; /* center thumb */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.sound-slider:focus::-webkit-slider-thumb,
.sound-slider:active::-webkit-slider-thumb {
  transform: scale(1.25);
  background: var(--color-accent-teal);
  box-shadow: 0 0 12px var(--color-accent-teal);
}

/* ── Sub-selectors (Chips) ── */
.sub-selectors {
  margin-top: var(--space-1);
  padding-left: calc(1.1rem + var(--space-2)); /* Align with text under icon */
}

.control-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.control-sublabel {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.selector-chips {
  display: flex;
  gap: var(--space-2);
}

.chip-btn {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  transition: all var(--duration-fast) ease;
}@media (hover: hover) and (pointer: fine) {


.chip-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
}
}

.chip-btn.active {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--color-text-primary);
}

/* ── Session Length Picker ── */
.session-length-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.session-len-btn {
  padding: var(--space-3) var(--space-2);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: all var(--duration-fast) ease;
}@media (hover: hover) and (pointer: fine) {


.session-len-btn:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.15);
}
}

.session-len-btn.is-selected {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--color-accent-teal);
  color: var(--color-text-primary);
  box-shadow: 0 0 12px rgba(175, 70%, 50%, 0.15);
}

.session-len-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Saved Mixes (2-slot custom save, separate from autosave) ── */
.saved-mixes-section {
  padding: 0;
  overflow: hidden;
}

.saved-mixes-content {
  padding: 0 var(--space-5) var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  border-top: 1px solid var(--color-glass-border);
}

.mix-slot {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-3);
}

.mix-slot-top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.mix-slot-label {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text-muted);
}

.mix-slot-name {
  color: var(--color-text-primary);
}

/* Quiet marker on the Pro-only slot rows (3–6, added by zen.js) — an
   affordance, not an upsell: free users never see these rows at all. */
.mix-slot-pro-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-full);
  padding: 0.05rem 0.45rem;
  line-height: 1.4;
  opacity: 0.8;
}

.mix-slot-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.mix-slot-input {
  flex: 1 1 120px;
  min-width: 0;
  min-height: 36px;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-glass-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text-primary);
  font-size: var(--text-xs);
}

.mix-slot-btn {
  min-height: 36px;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-glass-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}@media (hover: hover) and (pointer: fine) {


.mix-slot-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
}
}

.mix-slot-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.mix-slot-clear {
  padding: 0.4rem 0.6rem;
}

/* ── Master Control / Play Button ── */
.master-control-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
}

.play-ring-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-ring-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) ease;
}

.play-ring-wrap.is-sprint .play-ring-svg {
  opacity: 1;
}

.play-ring-track {
  fill: none;
  stroke: hsla(220, 20%, 25%, 0.4);
  stroke-width: 4;
}

.play-ring-arc {
  fill: none;
  stroke: var(--color-accent-teal);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear;
  filter: drop-shadow(0 0 8px rgba(175, 70%, 50%, 0.45));
}

.sprint-time-left {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-teal);
  letter-spacing: 0.02em;
}

.play-btn {
  position: relative;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: hsl(230, 40%, 6%);
  box-shadow: 0 0 24px rgba(175, 70%, 50%, 0.35);
  transition: transform 250ms var(--ease-bounce), box-shadow 250ms ease;
  outline: none;
}

.play-btn-glow {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: inherit;
  filter: blur(12px);
  opacity: 0;
  z-index: -1;
  transition: opacity 300ms ease;
}

body.is-playing .play-btn {
  background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent-purple));
  box-shadow: 0 0 32px rgba(175, 70%, 50%, 0.5);
  animation: pulse-button 3s infinite ease-in-out;
}

body.is-playing .play-btn-glow {
  opacity: 0.45;
}@media (hover: hover) and (pointer: fine) {


.play-btn:hover {
  transform: scale(1.06);
}
}

.play-btn:active {
  transform: scale(0.96);
}

.play-btn svg {
  width: 32px;
  height: 32px;
}

.play-icon {
  margin-left: 4px; /* Optical centering */
}

@keyframes pulse-button {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); box-shadow: 0 0 40px rgba(175, 70%, 50%, 0.65); }
  100% { transform: scale(1); }
}

.master-status {
  font-size: var(--text-sm);
  font-family: var(--font-display);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}

body.is-playing .master-status {
  color: var(--color-accent-teal);
}

/* ── Footer ── */
.zen-footer {
  text-align: center;
  font-size: 0.7rem;
  color: var(--color-text-dim);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-top: auto;
}

/* ── Responsive adjustments ── */
@media (max-width: 400px) {
  .presets-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Science Details Styling ── */
.science-section {
  padding: 0;
  overflow: hidden;
}

.science-details,
.saved-mixes-details,
.mixer-details {
  width: 100%;
}

.science-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  user-select: none;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.science-summary::-webkit-details-marker {
  display: none;
}

.science-arrow {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  transition: transform var(--duration-normal) var(--ease-out-expo);
  margin-right: 4px;
}

.science-details[open] .science-arrow,
.saved-mixes-details[open] .science-arrow,
.mixer-details[open] .science-arrow {
  transform: rotate(-135deg);
}

.science-content {
  padding: 0 var(--space-5) var(--space-5) var(--space-5);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  border-top: 1px solid var(--color-glass-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-height: 280px;
  overflow-y: auto;
}

/* Scrollbar for science content */
.science-content::-webkit-scrollbar {
  width: 4px;
}
.science-content::-webkit-scrollbar-track {
  background: transparent;
}
.science-content::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

.science-content h3 {
  font-family: var(--font-display);
  color: var(--color-text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  margin-top: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.science-content p strong {
  color: var(--color-accent-teal);
  font-weight: 500;
}

/* ── Bloom layer (soft sprint-completion celebration, ported from Focus Sprint) ── */
.bloom-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}
.bloom-piece {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(0.5px);
  animation: bloomDrift var(--dur, 1600ms) var(--ease-out-expo) forwards;
}
@keyframes bloomDrift {
  0%   { transform: translate(-50%, -50%) scale(0.4); opacity: 0; }
  15%  { opacity: 0.85; }
  100% { transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(1.1); opacity: 0; }
}

/* ── Sprint-end overlay (fixed-duration sessions only) ── */
.sprint-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--ease-out-expo);
}
.sprint-overlay.is-visible {
  opacity: 1;
  pointer-events: all;
}
.sprint-overlay-bg {
  position: absolute;
  inset: 0;
  background: hsla(230, 35%, 5%, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  pointer-events: none;
}
.sprint-overlay-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid hsla(220, 20%, 40%, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  text-align: center;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  animation: cardSlideIn 600ms var(--ease-bounce) both;
}
@keyframes cardSlideIn {
  from { transform: translateY(24px) scale(0.95); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}
.sprint-overlay-emoji {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-4);
}
.sprint-overlay-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-3);
  background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sprint-overlay-msg {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-6);
  font-weight: 300;
}
.next-suggestion {
  font-size: var(--text-xs);
  font-style: italic;
  color: var(--color-accent-teal);
  line-height: 1.5;
  margin: calc(-1 * var(--space-4)) 0 var(--space-5);
}
.next-suggestion:empty { display: none; }
.sprint-overlay .btn-primary {
  width: 100%;
  padding: 0.9rem var(--space-6);
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-teal));
  color: hsl(230, 40%, 8%);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: transform 200ms var(--ease-bounce);
}@media (hover: hover) and (pointer: fine) {

.sprint-overlay .btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
}
}

.sprint-overlay .btn-primary:active {
  transform: scale(0.97);
}