/* ============================================================
   Sayo UI Components
   Buttons, inputs, cards, badges, avatars, tabs, etc.
   ============================================================ */

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: var(--btn-height);
  padding: 0 22px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-semibold);
  font-size: var(--font-size-base);
  transition: all 0.2s ease;
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 75, 219, 0.3);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1.5px solid var(--color-border-input);
}
.btn-secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-text-secondary);
}

.btn-danger {
  background: var(--color-bg);
  color: var(--color-danger);
  border: 1.5px solid var(--color-danger-border);
}
.btn-danger:hover {
  background: #FDF5F4;
  border-color: var(--color-danger);
}

.btn-ghost {
  background: var(--color-surface);
  color: var(--color-text);
}
.btn-ghost:hover {
  background: var(--color-surface-alt);
}

.btn-icon {
  width: var(--btn-height-lg);
  height: var(--btn-height-lg);
  padding: 0;
  border-radius: 50%;
}

.btn-icon.active {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-icon.muted {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1.5px solid var(--color-border-input);
}

.btn-sm {
  height: var(--btn-height-sm);
  padding: 0 16px;
  font-size: var(--font-size-sm);
}

.btn-lg {
  height: var(--input-height);
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* ── Inputs ──────────────────────────────────────────────── */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: var(--font-size-sm);
  font-weight: var(--fw-semibold);
}

.input-field {
  height: var(--input-height);
  width: 100%;
  border: 1.5px solid var(--color-border-input);
  border-radius: var(--radius-md);
  padding: 0 16px;
  font-size: var(--font-size-md);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-field::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.6;
}

.input-field:hover {
  border-color: var(--color-text-secondary);
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 75, 219, 0.12);
  outline: none;
}

.input-field.error {
  border-color: var(--color-danger);
}

.input-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.input-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: var(--color-border-input);
  box-shadow: 0 2px 8px rgba(20, 21, 26, 0.06);
}

.card-elevated {
  border: none;
  box-shadow: var(--shadow-card);
}

.card-surface {
  border: none;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--fw-semibold);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge-level {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 6px 12px;
  font-size: var(--font-size-sm);
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  font-weight: var(--fw-semibold);
}

.badge-live::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-live 2s ease-in-out infinite;
}

/* ── Avatars ─────────────────────────────────────────────── */
.avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: var(--fw-semibold);
  flex-shrink: 0;
  user-select: none;
}

.avatar-sm {
  width: 32px;
  height: 32px;
  font-size: var(--font-size-xs);
}

.avatar-md {
  width: 40px;
  height: 40px;
  font-size: var(--font-size-base);
}

.avatar-lg {
  width: 72px;
  height: 72px;
  font-size: 26px;
}

.avatar-xl {
  width: 96px;
  height: 96px;
  font-size: 32px;
}

.avatar-speaking {
  box-shadow: 0 0 0 4px var(--color-bg), 0 0 0 6px var(--color-primary);
  animation: speaking-ring 1.5s ease-in-out infinite;
}

.avatar-stack {
  display: flex;
}

.avatar-stack .avatar {
  border: 2px solid var(--color-bg);
}

.avatar-stack .avatar + .avatar {
  margin-left: -10px;
}

/* ── Tabs ────────────────────────────────────────────────── */
.tab-group {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.tab-btn {
  flex: 1;
  height: 44px;
  border: 0;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-semibold);
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all 0.2s ease;
  background: transparent;
  color: var(--color-text-secondary);
}

.tab-btn.active {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* ── Level Pills ─────────────────────────────────────────── */
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  height: var(--btn-height-sm);
  min-width: 48px;
  padding: 0 14px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-semibold);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1.5px solid var(--color-border-input);
  background: var(--color-bg);
  color: var(--color-text);
}

.pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.pill.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ── Waveform ────────────────────────────────────────────── */
.waveform {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 32px;
}

.waveform-bar {
  width: 4px;
  border-radius: 2px;
  background: var(--color-primary);
  animation: waveform 1.2s ease-in-out infinite;
}

.waveform-bar:nth-child(1) { height: 10px; animation-delay: 0s; }
.waveform-bar:nth-child(2) { height: 22px; animation-delay: 0.1s; }
.waveform-bar:nth-child(3) { height: 14px; animation-delay: 0.2s; }
.waveform-bar:nth-child(4) { height: 30px; animation-delay: 0.3s; }
.waveform-bar:nth-child(5) { height: 18px; animation-delay: 0.4s; }
.waveform-bar:nth-child(6) { height: 8px; animation-delay: 0.5s; }
.waveform-bar:nth-child(7) { height: 24px; animation-delay: 0.6s; }

/* ── Divider ─────────────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ── Participant Tile ────────────────────────────────────── */
.participant-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px 16px;
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  transition: border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.participant-tile.speaking {
  border: 2px solid var(--color-primary);
}

.participant-tile video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.participant-tile .participant-overlay {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.participant-tile.has-video .participant-overlay {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  flex-direction: row;
  background: rgba(20, 21, 26, 0.7);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  gap: 8px;
}

.participant-tile.has-video .participant-overlay .avatar-lg {
  display: none;
}

.participant-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-base);
  font-weight: var(--fw-semibold);
}

.participant-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.participant-tile.has-video .participant-name,
.participant-tile.has-video .participant-note {
  color: #ffffff;
}

/* ── Chat ────────────────────────────────────────────────── */
.chat-container {
  flex: 1;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-title {
  font-size: var(--font-size-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
}

.chat-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  max-height: 400px;
}

.chat-message {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chat-sender {
  font-size: var(--font-size-xs);
  font-weight: var(--fw-semibold);
}

.chat-text {
  font-size: var(--font-size-base);
  line-height: 1.4;
  color: var(--color-text-body);
}

.chat-time {
  font-size: 11px;
  color: var(--color-text-secondary);
  opacity: 0.7;
}

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
  padding: 64px 24px;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.empty-state-title {
  font-size: var(--font-size-xl);
  font-weight: var(--fw-semibold);
}

.empty-state-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* ── Topic Card ──────────────────────────────────────────── */
.topic-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topic-label {
  font-size: var(--font-size-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-primary-dark);
}

.topic-title {
  font-size: var(--font-size-xl);
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: var(--fw-semibold);
}

.topic-list {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: var(--font-size-base);
  line-height: 1.45;
  color: var(--color-text-body);
  list-style: disc;
}

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 21, 26, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-2xl);
  padding: 32px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  box-shadow: 0 24px 64px rgba(20, 21, 26, 0.2);
  transform: translateY(16px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.modal-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.015em;
}

.modal-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: background 0.2s ease;
}

.modal-close:hover {
  background: var(--color-surface);
}

/* ── Toast / Notification ────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--color-text);
  color: #ffffff;
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--fw-medium);
  box-shadow: 0 8px 24px rgba(20, 21, 26, 0.3);
  animation: toast-in 0.3s ease;
}

.toast.toast-out {
  animation: toast-out 0.3s ease forwards;
}

/* ============================================================
   PDF hizalama düzeltmeleri (Home / Rooms / Room / Auth)
   ============================================================ */

/* ── Ek buton varyantları ────────────────────────────────── */
.btn-outline {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1.5px solid var(--color-border-input);
}
.btn-outline:hover {
  background: var(--color-surface);
}

.btn-white {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: 0 1px 2px rgba(20, 21, 26, 0.06);
}
.btn-white:hover {
  background: var(--color-surface-alt);
}

/* ── İçeriğe göre genişleyen sekme grubu (Rooms) ─────────── */
.tab-group-inline {
  display: inline-flex;
  width: auto;
}
.tab-group-inline .tab-btn {
  flex: 0 0 auto;
  padding: 0 18px;
  white-space: nowrap;
}

/* ── Oda kartı ───────────────────────────────────────────── */
.room-card {
  gap: 16px;
  text-align: left;
  font: inherit;
  color: inherit;
  width: 100%;
}
.room-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.room-card-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.room-card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.room-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.015em;
  line-height: 1.3;
}
.room-card-topic {
  font-size: var(--font-size-base);
  line-height: 1.45;
  color: var(--color-text-secondary);
}
.room-card-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.room-card-live {
  cursor: pointer;
}
.room-card-live .avatar-stack {
  margin-top: auto;
}
.live-count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
}

/* ── Home: prompt + seviye kartları ──────────────────────── */
.prompt-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}
.prompt-label {
  font-size: var(--font-size-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-primary-dark);
}
.prompt-title {
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: -0.025em;
  max-width: 540px;
}
.prompt-text {
  font-size: var(--font-size-base);
  color: var(--color-text-body);
  margin-top: 8px;
}
.prompt-btn {
  height: 52px;
  padding: 0 26px;
  margin-top: 4px;
}

.level-card {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 36px 32px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 32px;
}
.level-card-top {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.level-card-label,
.level-card-name,
.level-card-next {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.level-card-label {
  font-weight: var(--fw-medium);
  color: var(--color-text-body);
}
.level-card-code {
  font-size: 44px;
  line-height: 1.1;
  font-weight: var(--fw-semibold);
  letter-spacing: -0.03em;
  margin: 4px 0 8px;
}
.level-card-bottom {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.progress {
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface-alt);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--color-primary);
}

/* ── Home: study kartı ───────────────────────────────────── */
.study-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.study-card-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.study-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.015em;
}
.study-card-topic {
  font-size: var(--font-size-sm);
  line-height: 1.4;
  color: var(--color-text-body);
}