/* app.css — Design system Passo by Curelia */

/* ── FONT: Inter Variable (self-hosted, offline) ──────────────────────────── */
@font-face {
  font-family: 'Inter';
  src: url('../../assets/fonts/inter-latin-wght-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ── VARIABILI BRAND CURELIA ──────────────────────────────────────────────── */
:root {
  /* colori */
  --color-bg:           #0a0a0a;
  --color-surface:      #111111;
  --color-surface-2:    #1c1c1c;
  --color-border:       #272727;
  --color-text:         #f5f5f5;
  --color-text-muted:   #6b7280;
  --color-text-secondary: #9ca3af;

  /* brand Curelia — teal */
  --color-teal:         #0d9488;
  --color-teal-light:   #14b8a8;
  --color-teal-glow:    rgba(13, 148, 136, 0.22);
  --color-teal-glow-strong: rgba(13, 148, 136, 0.38);

  /* tipografia — scala Curelia */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs:   12px;   /* label, metadati */
  --font-size-sm:   13px;   /* label secondari */
  --font-size-body: 15px;   /* body principale */
  --font-size-md:   17px;   /* titoli sottosezione */
  --font-size-lg:   20px;   /* titoli sezione */
  --font-size-xl:   28px;   /* display BPM */

  /* spaziatura — sistema Curelia */
  --space-xs:  8px;
  --space-sm:  12px;
  --space-md:  20px;   /* padding interno card */
  --space-lg:  24px;   /* gap tra sezioni */
  --space-xl:  32px;

  /* border radius — sistema Curelia */
  --radius-sm:   8px;    /* elementi inline */
  --radius-md:   12px;   /* card */
  --radius-lg:   20px;   /* sheet, drawer */
  --radius-full: 9999px; /* pill, badge, cerchi */

  /* motion */
  --ease-out:    cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:   150ms;
  --duration-normal: 280ms;
  --duration-slow:   420ms;
}

/* ── BASE ──────────────────────────────────────────────────────────────────── */
body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: 400;
  line-height: 1.5;
  background-color: var(--color-bg);
  color: var(--color-text);
  overflow: hidden;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* feature settings per Inter: migliora leggibilità numeri */
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

/* ── SCHERMATA ─────────────────────────────────────────────────────────────── */
.screen {
  display: none;
  flex-direction: column;
  height: 100dvh;
}
.screen.active {
  display: flex;
}

/* ── HEADER ────────────────────────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--space-lg) 0;
}

.app-logo {
  font-size: var(--font-size-md);
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--color-text);
}

/* indicatore brand teal sul logo */
.app-logo::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-teal);
  border-radius: var(--radius-full);
  margin-left: 5px;
  vertical-align: middle;
  margin-bottom: 2px;
}

.btn-settings {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background var(--duration-fast);
  -webkit-tap-highlight-color: transparent;
}
.btn-settings svg {
  width: 21px;
  height: 21px;
}
.btn-settings:active {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* ── CONTENUTO PRINCIPALE ──────────────────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding-bottom: 72px;
  position: relative;
}

/* Glow radiale ambientale */
.main-content::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, var(--color-teal-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(60px);
  opacity: 0.4;
  transition: opacity var(--duration-slow) var(--ease-out),
              width var(--duration-slow) var(--ease-out),
              height var(--duration-slow) var(--ease-out);
}

/* Glow più intenso quando cueing attivo */
body.is-active .main-content::before {
  opacity: 1;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--color-teal-glow-strong) 0%, transparent 70%);
}

/* ── STATUS LABEL ──────────────────────────────────────────────────────────── */
.status-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--duration-normal) var(--ease-out);
  height: 18px;
}
.status-label.active {
  color: var(--color-teal-light);
}

/* ── PULSANTE PRINCIPALE ───────────────────────────────────────────────────── */
.btn-main {
  position: relative;
  width: 196px;
  height: 196px;
  border-radius: var(--radius-full);
  -webkit-tap-highlight-color: transparent;
  outline: none;
  transition: transform var(--duration-slow) var(--ease-spring);
}

.btn-main:active {
  transform: scale(0.93);
}

/* anelli pulsanti */
.btn-main__ring {
  position: absolute;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: border-color var(--duration-normal) var(--ease-out);
  pointer-events: none;
}
.btn-main__ring--outer { inset: -26px; }
.btn-main__ring--inner { inset: -13px; }

/* nucleo */
.btn-main__core {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.btn-main__core svg {
  width: 52px;
  height: 52px;
  color: var(--color-text);
  transition:
    opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-slow) var(--ease-spring);
}

.icon-play { opacity: 1;  transform: translateX(3px) scale(1); }
.icon-stop { opacity: 0;  position: absolute; transform: scale(0.75); }

/* ── STATO ATTIVO ──────────────────────────────────────────────────────────── */
body.is-active .btn-main__core {
  background: var(--color-teal);
  border-color: var(--color-teal-light);
  box-shadow:
    0 0 0 1px var(--color-teal-glow),
    0 0 48px var(--color-teal-glow-strong),
    0 0 100px var(--color-teal-glow);
}

body.is-active .btn-main__ring {
  border-color: rgba(13, 148, 136, 0.25);
}

body.is-active .btn-main__ring--outer {
  animation: pulse-ring-outer 1.4s var(--ease-out) infinite;
}
body.is-active .btn-main__ring--inner {
  animation: pulse-ring-inner 1.4s var(--ease-out) 0.2s infinite;
}

body.is-active .icon-play { opacity: 0; transform: translateX(3px) scale(0.75); }
body.is-active .icon-stop { opacity: 1; transform: scale(1); }

body.is-active .status-label { color: var(--color-teal-light); }

@keyframes pulse-ring-outer {
  0%   { transform: scale(1);    opacity: 0.55; }
  100% { transform: scale(1.14); opacity: 0; }
}
@keyframes pulse-ring-inner {
  0%   { transform: scale(1);    opacity: 0.35; }
  100% { transform: scale(1.09); opacity: 0; }
}

/* ── BPM DISPLAY ───────────────────────────────────────────────────────────── */
.bpm-display {
  font-size: var(--font-size-body);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: -0.3px;
  font-feature-settings: "tnum"; /* numeri tabular width */
}
#bpm-value {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -1px;
}
.bpm-unit {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-left: 3px;
  color: var(--color-text-muted);
}

/* ── PANNELLO IMPOSTAZIONI ─────────────────────────────────────────────────── */
.settings-panel {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
}
.settings-panel[aria-hidden="false"] {
  pointer-events: auto;
}

.settings-panel__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}
.settings-panel[aria-hidden="false"] .settings-panel__backdrop {
  opacity: 1;
}

.settings-panel__sheet {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-top: 1px solid var(--color-border);
  padding: 0 0 env(safe-area-inset-bottom, 28px);
  transform: translateY(100%);
  transition: transform var(--duration-normal) var(--ease-out);
}
.settings-panel[aria-hidden="false"] .settings-panel__sheet {
  transform: translateY(0);
}

.settings-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}
.settings-panel__header h2 {
  font-size: var(--font-size-md);
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--color-text);
}

.btn-close {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  -webkit-tap-highlight-color: transparent;
  transition: background var(--duration-fast);
}
.btn-close svg { width: 13px; height: 13px; }
.btn-close:active { background: var(--color-border); }

/* ── RIGHE IMPOSTAZIONI ────────────────────────────────────────────────────── */
.settings-list { padding: 4px 0; }

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  gap: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}
.setting-row:last-child { border-bottom: none; }

.setting-label {
  font-size: var(--font-size-body);
  font-weight: 400;
  color: var(--color-text);
  flex-shrink: 0;
}

.setting-control {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  justify-content: flex-end;
}

.setting-value {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  min-width: 36px;
  text-align: right;
  font-feature-settings: "tnum";
}

/* ── SLIDER ────────────────────────────────────────────────────────────────── */
input[type="range"] {
  flex: 1;
  max-width: 130px;
  height: 3px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  outline: none;
  accent-color: var(--color-teal);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: #ffffff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: none;
  box-shadow: 0 1px 6px rgba(0,0,0,0.5);
}

/* ── SEGMENTED CONTROL ─────────────────────────────────────────────────────── */
.setting-control--segmented {
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: 3px;
  gap: 2px;
}
.seg-btn {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: 6px 13px;
  border-radius: 6px;
  color: var(--color-text-muted);
  transition:
    background var(--duration-fast),
    color var(--duration-fast);
  -webkit-tap-highlight-color: transparent;
  letter-spacing: 0.1px;
}
.seg-btn.active {
  background: var(--color-teal);
  color: #ffffff;
}

/* ── BTN DETECT KEY ────────────────────────────────────────────────────────── */
.btn-detect {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface-2);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition:
    background var(--duration-fast),
    border-color var(--duration-fast);
  -webkit-tap-highlight-color: transparent;
  letter-spacing: 0.1px;
}
.btn-detect:active {
  background: var(--color-border);
}
.btn-detect.listening {
  background: var(--color-teal);
  border-color: var(--color-teal);
  color: #ffffff;
  animation: listening-pulse 1s ease-in-out infinite;
}
@keyframes listening-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.65; }
}
.btn-detect.confirmed {
  background: #065f46;
  border-color: #059669;
  color: #ffffff;
  animation: confirm-flash 0.4s ease-out;
}
@keyframes confirm-flash {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}

/* ── FOOTER SETTINGS ───────────────────────────────────────────────────────── */
.settings-footer {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-md) var(--space-lg) var(--space-xs);
  letter-spacing: 0.3px;
  opacity: 0.45;
}

/* ── SETTING SECTION HEADER ────────────────────────────────────────────────── */
.setting-section-header {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-md) var(--space-lg) var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

/* ── SETTING NOTE ──────────────────────────────────────────────────────────── */
.setting-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: var(--space-sm) var(--space-lg) var(--space-md);
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-text-muted);
}
.setting-note svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--color-teal);
  opacity: 0.7;
}

/* ── ONBOARDING ────────────────────────────────────────────────────────────── */
.onboarding {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-bg);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}
.onboarding[aria-hidden="false"] {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}

.onboarding__content {
  width: 100%;
  max-width: 360px;
  padding: 0 var(--space-lg);
  display: flex;
  flex-direction: column;
  min-height: 420px;
}

.onboarding__slides {
  flex: 1;
  position: relative;
}

.onboarding__slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
  pointer-events: none;
}
.onboarding__slide.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}
.onboarding__slide.exiting {
  opacity: 0;
  transform: translateX(-30px);
}

.onboarding__icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-teal-light);
  margin-bottom: var(--space-lg);
}
.onboarding__icon svg {
  width: 56px;
  height: 56px;
}

.onboarding__slide h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.onboarding__slide p {
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 300px;
}

.onboarding__hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-md);
  padding: 10px 16px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--color-teal-light);
  text-align: left;
}
.onboarding__hint svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.6;
}

/* Nav onboarding */
.onboarding__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0 var(--space-xl);
}

.onboarding__dots {
  display: flex;
  gap: 8px;
}
.onboarding__dots .dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  transition: background var(--duration-fast);
}
.onboarding__dots .dot.active {
  background: var(--color-teal);
}

.onboarding__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--color-bg);
  background: var(--color-teal);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  transition: background var(--duration-fast), transform var(--duration-fast);
  -webkit-tap-highlight-color: transparent;
}
.onboarding__btn:active {
  transform: scale(0.96);
  background: var(--color-teal-light);
}
.onboarding__btn svg {
  width: 18px;
  height: 18px;
}