/* ═══════════════════════════════════════════
   SendenSana — Responsive (Mobile-First)
   ═══════════════════════════════════════════ */

/* ── Hamburger Button (hidden on desktop) ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 10;
  position: relative;
}

.hamburger__line {
  width: 24px;
  height: 2px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger--open .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger--open .hamburger__line:nth-child(2) {
  opacity: 0;
}
.hamburger--open .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ═══ TABLET & MOBILE (max 768px) ═══ */
@media (max-width: 768px) {
  :root {
    --fs-5xl: 1.8rem;
    --fs-4xl: 1.5rem;
    --fs-3xl: 1.3rem;
    --fs-2xl: 1.15rem;
    --fs-xl: 1rem;
    --fs-lg: 0.95rem;
    --fs-base: 0.875rem;
    --fs-sm: 0.8rem;
    --fs-xs: 0.7rem;
    --fs-timer: 3rem;
  }

  /* ── Banner — kompakt tek satır ── */
  .header-banner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0;
    padding: env(safe-area-inset-top, 6px) var(--sp-3) 6px;
    min-height: 50px;
  }

  .header-banner__brand {
    padding: var(--sp-2) var(--sp-3);
    gap: var(--sp-2);
  }

  .header-banner__logo { width: 26px; height: 26px; }

  .hero-letter { font-size: 0.75rem; letter-spacing: 2px; }
  .hero-letter--cap { font-size: 1rem; letter-spacing: 3px; }
  .header-banner__slogan { font-size: 0.48rem; letter-spacing: 1.5px; }

  /* ── Hamburger menü ── */
  .hamburger { display: flex; }

  .header-banner__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10, 10, 15, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--sp-1) 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }

  .header-banner__nav--open { display: flex; }

  .nav__link {
    font-size: 0.8rem;
    font-weight: 600;
    padding: var(--sp-3) var(--sp-5);
    letter-spacing: 1px;
    text-align: left;
    border-radius: 0;
    white-space: nowrap;
  }

  .nav__link:hover,
  .nav__link--active {
    background: rgba(139, 92, 246, 0.1);
  }

  .header-banner__nav .lang-selector {
    margin: var(--sp-2) var(--sp-5) var(--sp-3);
    width: calc(100% - var(--sp-5) * 2);
  }

  .header-banner--sticky { min-height: 50px; }

  /* ── Page layout ── */
  .page { padding-top: 70px; }
  .page--has-hero { padding-top: 60px; }

  .content {
    padding: 0 var(--sp-3);
  }

  .content h2,
  .content h3 {
    font-size: var(--fs-3xl);
  }

  .content p {
    font-size: var(--fs-base);
    line-height: 1.7;
  }

  /* Ana sayfa açıklama metni */
  .page--has-hero .content p {
    font-size: var(--fs-base) !important;
    line-height: 1.7 !important;
  }

  /* ── Practice Grid — 2 sütun ── */
  .practice-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-2);
    padding: 0 var(--sp-2);
    max-width: 100%;
  }

  .practice-grid .practice-card {
    width: 100% !important;
  }

  .practice-card {
    padding: var(--sp-3) var(--sp-2);
  }

  .practice-card__icon { font-size: 1.3rem; margin-bottom: var(--sp-1); }
  .practice-card__title { font-size: 0.8rem; }
  .practice-card__subtitle { font-size: 0.6rem; letter-spacing: 0.5px; }

  /* ── Pratik ekranları — kontrol butonları ── */
  .practice__top {
    padding: var(--sp-4) var(--sp-3) var(--sp-2);
  }

  .practice__title {
    font-size: var(--fs-3xl) !important;
  }

  .practice__controls {
    padding: var(--sp-3) var(--sp-3) var(--sp-4);
  }

  .control-group {
    margin-bottom: var(--sp-3);
  }

  .control-group__label {
    font-size: var(--fs-xs);
    margin-bottom: var(--sp-2);
  }

  .control-group__options {
    gap: var(--sp-1);
  }

  .ctrl-btn {
    padding: 6px 10px;
    font-size: 0.7rem;
    min-width: 44px;
    border-radius: 6px;
  }

  /* Frekans butonları — daha kompakt */
  .ctrl-btn .ctrl-btn__desc {
    font-size: 0.55rem;
  }

  /* ── Timer ── */
  .timer-display {
    font-size: var(--fs-timer);
    margin: var(--sp-2) 0;
  }

  /* ── Butonlar ── */
  .btn-group {
    flex-direction: column;
    gap: var(--sp-2);
    margin-top: var(--sp-4);
  }

  .btn--primary {
    width: 100%;
    text-align: center;
    padding: var(--sp-3) var(--sp-6);
    font-size: var(--fs-base);
  }

  .btn--ghost,
  .btn--outline {
    font-size: var(--fs-sm);
    padding: var(--sp-2) var(--sp-3);
  }

  /* ── Bilgi notları ── */
  .info-note {
    font-size: var(--fs-sm);
    padding: 0 var(--sp-2);
    line-height: 1.6;
  }

  .info-note h4 {
    font-size: var(--fs-base);
    margin-bottom: var(--sp-1);
  }

  .info-note p {
    font-size: var(--fs-sm);
    margin-bottom: var(--sp-2);
  }

  /* ── Practice intro (açıklama sayfası) ── */
  .practice__intro {
    padding: var(--sp-4) var(--sp-3);
  }

  .practice__intro h4 {
    font-size: var(--fs-base);
  }

  .practice__intro p,
  .practice__intro li {
    font-size: var(--fs-sm);
    line-height: 1.6;
  }

  .practice__proceed-btn {
    font-size: var(--fs-base);
    padding: var(--sp-3) var(--sp-6);
  }

  /* ── Content box (referanslar, hakkımızda) ── */
  .content-box {
    padding: var(--sp-4);
    border-radius: var(--r-md);
  }

  .content-box h3 { font-size: var(--fs-xl); }
  .content-box h4 { font-size: var(--fs-base); }
  .content-box p { font-size: var(--fs-sm); line-height: 1.6; }

  /* ── Stats panel ── */
  .stats-hero {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-2);
  }

  .stats-hero__value { font-size: var(--fs-3xl); }
  .stats-hero__label { font-size: var(--fs-xs); }

  /* ── Ekosistem footer ── */
  .platform-links {
    flex-direction: column;
    gap: var(--sp-2);
  }

  .footer {
    padding: var(--sp-3) var(--sp-3) var(--sp-2);
  }

  .footer__eco {
    flex-direction: column;
    gap: var(--sp-2);
  }

  .footer__eco-logo { width: 36px; height: 36px; }
  .footer__eco-name { font-size: var(--fs-base); }
  .footer__eco-slogan { font-size: 0.65rem; max-width: 140px; }
  .footer__eco-role { font-size: 0.6rem; }
  .footer__tagline { font-size: 0.6rem; letter-spacing: 1.5px; }

  /* ── Ambient player ── */
  .ambient-player {
    padding: var(--sp-2) var(--sp-4);
    gap: var(--sp-2);
  }

  .ambient-player__label { font-size: var(--fs-xs); }
  .ambient-player__btn { width: 24px; height: 24px; }
  .ambient-player__icon { font-size: 10px; }

  /* ── Volume slider ── */
  .volume-group {
    padding: 0 var(--sp-2);
  }

  /* ── Minibar (playing mode) ── */
  .practice-screen--playing .practice__minibar {
    padding: var(--sp-2) var(--sp-4);
    gap: var(--sp-3);
    bottom: var(--sp-4);
  }

  .practice__minibar-timer { font-size: var(--fs-base); }
  .practice__minibar-btn { font-size: var(--fs-lg); }

  /* ── Solfej info panel ── */
  .solfej-info-panel {
    bottom: 65px;
    max-width: 320px;
    padding: 12px 16px;
    gap: 8px;
  }
  .solfej-info-panel__freq { font-size: 1.3rem; }
  .solfej-info-panel__chakra { font-size: 0.6rem; }
  .solfej-info-panel__desc { font-size: 0.75rem; }
  .solfej-info-panel__benefit { font-size: 0.65rem; }

  /* ── Nefes dairesi ── */
  .breath-circle {
    width: 160px;
    height: 160px;
  }

  /* ── Mixer panel ── */
  .mixer-panel { padding: var(--sp-3); }
  .mixer-layer__label { font-size: var(--fs-xs); min-width: 50px; }

  /* ── Onboarding ── */
  .onboarding-card { padding: var(--sp-5); }
  .onboarding-title { font-size: var(--fs-3xl); }
  .onboarding-option { padding: var(--sp-3) var(--sp-4); font-size: var(--fs-sm); }
  .onboarding-option__icon { font-size: var(--fs-xl); }

  /* ── Mood check-in ── */
  .mood-checkin__btn { width: 40px; height: 40px; font-size: 1.5rem; }
}

/* ═══ SMALL PHONES (max 380px) ═══ */
@media (max-width: 380px) {
  .hero-letter { font-size: 0.6rem; letter-spacing: 1px; }
  .hero-letter--cap { font-size: 0.8rem; letter-spacing: 2px; }
  .header-banner__slogan { display: none; }
  .header-banner__logo { width: 22px; height: 22px; }

  .practice-grid {
    gap: var(--sp-1);
    padding: 0 var(--sp-1);
  }

  .practice-card__title { font-size: 0.75rem; }
  .practice-card__subtitle { font-size: 0.55rem; }

  .ctrl-btn {
    padding: 5px 8px;
    font-size: 0.65rem;
    min-width: 38px;
  }

  .breath-circle {
    width: 130px;
    height: 130px;
  }
}

/* ═══ DESKTOP (min 1024px) ═══ */
@media (min-width: 1024px) {
  .practice-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 800px;
  }
}