/* CSS değişkenleri — Duolingo tarzı renk paleti */
:root {
  /* Ana yeşil */
  --color-primary: #58cc02;
  --color-primary-hover: #4caf00;
  --color-primary-dark: #3a8a00;

  /* Mavi (bilgi, quiz, interaktif) */
  --color-blue: #1cb0f6;
  --color-blue-hover: #0fa3e8;
  --color-blue-dark: #0d8bcf;

  /* Turuncu (uyarı, heyecan, önemli) */
  --color-orange: #ff9600;
  --color-orange-hover: #e68700;

  /* Kırmızı (hasar, tehlike, yanlış) */
  --color-danger: #ff4b4b;
  --color-danger-hover: #e63e3e;

  /* Sarı (başarı, bonus, altın) */
  --color-gold: #ffc800;
  --color-gold-hover: #e6b500;

  /* Mor (premium, özel, quiz) */
  --color-purple: #ce82ff;
  --color-purple-hover: #b86ee6;

  /* Eski uyumluluk */
  --color-secondary: #e5e5e5;
  --color-secondary-hover: #d0d0d0;
  --color-accent: #ff9600;
  --color-accent-hover: #e68700;
  --color-success: #58cc02;

  /* Arka plan: açık, ferah (Duolingo tarzı) */
  --color-bg: #f7f7f7;
  --color-bg-alt: #e5e5e5;

  /* Yüzey: beyaz kartlar */
  --color-surface: #ffffff;
  --color-surface2: #f0f0f0;
  --color-surface-elevated: #ffffff;

  /* Metin */
  --color-text: #3c3c3c;
  --color-text-muted: #777777;
  --color-text-light: #afafaf;
  --color-text-on-primary: #ffffff;

  /* Gölge */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  --shadow-primary: 0 4px 12px rgba(88,204,2,0.3);
  --shadow-blue: 0 4px 12px rgba(28,176,246,0.3);

  /* Buton 3D gölgeleri */
  --btn-shadow-green: 0 4px 0 #3a8a00;
  --btn-shadow-blue: 0 4px 0 #0d8bcf;
  --btn-shadow-orange: 0 4px 0 #cc7a00;
  --btn-shadow-danger: 0 4px 0 #cc3333;
  --btn-shadow-gray: 0 4px 0 #d0d0d0;

  /* Border radius (daha yuvarlak — cartoon hissi) */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: 0.2s ease;
}

/* Reset ve temel stiller */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: linear-gradient(135deg, #e8f5e9 0%, #e3f2fd 50%, #fff3e0 100%);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: 'Poppins', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

/* Ekran yardımcısı */
.screen {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── ORTAK BUTON STİLLERİ ─────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-lg);
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: transform 0.1s, box-shadow 0.1s, background-color var(--transition);
  text-align: center;
  white-space: nowrap;
  position: relative;
}

.btn:hover:not(:disabled) {
  transform: scale(1.02) translateY(-2px);
}

.btn:active:not(:disabled) {
  transform: translateY(4px);
  box-shadow: 0 0 0 transparent;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn__icon {
  font-size: 1.1em;
  line-height: 1;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  width: 100%;
  box-shadow: var(--btn-shadow-green);
  font-weight: 700;
}

.btn--primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  box-shadow: 0 6px 0 var(--color-primary-dark);
}

.btn--primary:active:not(:disabled) {
  box-shadow: 0 0 0 var(--color-primary-dark);
}

.btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 2px solid var(--color-bg-alt);
  box-shadow: var(--btn-shadow-gray);
  font-weight: 700;
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-surface2);
}

.btn--secondary:active:not(:disabled) {
  box-shadow: none;
}

.btn--accent {
  background-color: var(--color-blue);
  color: var(--color-text-on-primary);
  width: 100%;
  box-shadow: var(--btn-shadow-blue);
  font-weight: 700;
}

.btn--accent:hover:not(:disabled) {
  background-color: var(--color-blue-hover);
  box-shadow: 0 6px 0 var(--color-blue-dark);
}

.btn--accent:active:not(:disabled) {
  box-shadow: 0 0 0 var(--color-blue-dark);
}

/* Outline (matchmaking iptal) */
.btn--outline {
  background: transparent;
  color: var(--color-text-muted);
  border: 2px solid var(--color-bg-alt);
  box-shadow: none;
  font-weight: 600;
}

.btn--outline:hover:not(:disabled) {
  border-color: var(--color-danger);
  color: var(--color-danger);
  background: rgba(255, 75, 75, 0.05);
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface2);
  color: var(--color-text);
  font-weight: 600;
}

.btn--sm:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* ─── ANA EKRAN ARKA PLAN EFEKTLERİ ────────────────────── */

.home__bg-shapes {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.home__bg-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  will-change: transform;
  animation: bg-float 20s infinite ease-in-out;
}

.home__bg-shape--1 {
  width: 400px;
  height: 400px;
  background: var(--color-primary);
  top: -100px;
  left: -100px;
}

.home__bg-shape--2 {
  width: 350px;
  height: 350px;
  background: var(--color-blue);
  top: 30%;
  right: -80px;
  animation-delay: -7s;
  animation-direction: reverse;
}

.home__bg-shape--3 {
  width: 300px;
  height: 300px;
  background: var(--color-orange);
  bottom: -50px;
  left: 20%;
  animation-delay: -13s;
}

@keyframes bg-float {
  0%, 100% { transform: translate(0, 0); }
  25%      { transform: translate(30px, -20px); }
  50%      { transform: translate(-20px, 30px); }
  75%      { transform: translate(20px, 20px); }
}

/* ─── GİRİŞ EKRANI ─────────────────────────────────────── */

.home__container {
  width: 100%;
  max-width: 420px;
  padding: 40px 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.home__logo {
  text-align: center;
  animation: logo-float 3s ease-in-out infinite;
  animation-delay: 0.8s;
}

.home__title {
  font-size: 3rem;
  font-weight: 900;
  text-align: center;
  letter-spacing: -1px;
  display: inline-flex;
  position: relative;
  overflow: hidden;
}

/* Gradient text efekti */
.home__title-letter {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary), var(--color-blue), var(--color-orange));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: letter-bounce 0.5s ease forwards, gradient-shift 4s ease infinite;
  animation-delay: calc(var(--i) * 0.06s), 1s;
  opacity: 0;
}

/* "z" harfi özel — turuncu accent */
.home__title-letter--accent {
  background: linear-gradient(135deg, var(--color-orange), var(--color-gold));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: letter-bounce 0.5s ease forwards, letter-wiggle 2s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.06s), 1s;
}

/* Shimmer efekti */
.home__title::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 3s ease-in-out infinite;
  animation-delay: 1.5s;
}

.home__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: 4px;
  opacity: 0;
  animation: subtitle-appear 0.5s ease forwards;
  animation-delay: 0.6s;
}

@keyframes letter-bounce {
  0%   { transform: translateY(-40px); opacity: 0; }
  60%  { transform: translateY(8px); opacity: 1; }
  80%  { transform: translateY(-4px); }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

@keyframes letter-wiggle {
  0%, 100% { transform: rotate(0deg); }
  25%      { transform: rotate(5deg); }
  75%      { transform: rotate(-5deg); }
}

@keyframes shimmer {
  0%   { left: -100%; }
  100% { left: 200%; }
}

@keyframes logo-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes subtitle-appear {
  0%   { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* Input wrapper (ikonlu) */
.home__input-wrap {
  position: relative;
  width: 100%;
}

.home__input-wrap--flex {
  flex: 1;
}

.home__input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  pointer-events: none;
  z-index: 1;
}

.home__input {
  width: 100%;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 2px solid var(--color-bg-alt);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}

.home__input--with-icon {
  padding-left: 42px;
}

.home__input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(28, 176, 246, 0.15);
}

/* iOS zoom engellemek için input font size */
input, select, textarea {
  font-size: 16px;
}

.home__input--code {
  text-transform: uppercase;
  letter-spacing: 4px;
  font-weight: 700;
  font-size: 1.1rem;
}

.home__input--code:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(88, 204, 2, 0.15);
}

.home__langs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.lang-btn {
  padding: 16px 12px;
  background: var(--color-surface);
  border: 2px solid var(--color-bg-alt);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
  position: relative;
  color: var(--color-text-muted);
}

.lang-btn__flag {
  font-size: 2rem;
  line-height: 1;
}

.lang-btn__label {
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-btn__check {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.2s, transform 0.2s;
}

.lang-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}

.lang-btn--active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-primary);
  background: rgba(88, 204, 2, 0.05);
  color: var(--color-text);
}

.lang-btn--active .lang-btn__check {
  opacity: 1;
  transform: scale(1);
}

@keyframes lang-select-bounce {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.lang-btn--bounce {
  animation: lang-select-bounce 0.3s ease;
}

.home__join-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.home__join-row .home__input {
  flex: 1;
}

.home__join-row .btn {
  flex-shrink: 0;
  width: auto;
}

.home__error {
  color: var(--color-danger);
  font-size: 0.9rem;
  text-align: center;
  min-height: 20px;
}

/* ─── AVATAR SEÇİCİ ────────────────────────────────────── */

.avatar-selector {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.avatar-selector__selected {
  width: 72px;
  height: 72px;
  font-size: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 3px solid var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-md);
  user-select: none;
}

.avatar-selector__selected:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-primary);
}

.avatar-selector__grid {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin-top: 8px;
  position: absolute;
  top: 100%;
  z-index: 10;
  border: 2px solid var(--color-bg-alt);
}

.avatar-selector__grid--open {
  display: grid;
}

.avatar-selector__item {
  width: 48px;
  height: 48px;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
}

.avatar-selector__item:hover {
  transform: scale(1.15);
  border-color: var(--color-primary);
  background: rgba(88, 204, 2, 0.08);
}

.avatar-selector__item--active {
  border-color: var(--color-primary);
  background: rgba(88, 204, 2, 0.12);
}

@keyframes avatar-bounce {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.25); }
  70%  { transform: scale(0.95); }
  100% { transform: scale(1); }
}

.avatar-selector__selected--bounce {
  animation: avatar-bounce 0.4s ease;
}

/* ─── LOBİ EKRANI ───────────────────────────────────────── */

.lobby__container {
  width: 100%;
  max-width: 460px;
  padding: 40px 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.lobby__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Matchmaking spinner (eski — fallback) */
.lobby__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-surface2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.lobby__hint {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ─── MATCHMAKİNG YENİ TASARIM ────────────────────────── */

.matchmaking {
  align-items: center;
}

.matchmaking__icon {
  font-size: 3.5rem;
  animation: mm-wobble 2s ease-in-out infinite;
  line-height: 1;
}

@keyframes mm-wobble {
  0%, 100% { transform: rotate(0deg) scale(1); }
  25%      { transform: rotate(15deg) scale(1.05); }
  50%      { transform: rotate(0deg) scale(1); }
  75%      { transform: rotate(-15deg) scale(1.05); }
}

.matchmaking__dots {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.matchmaking__dot {
  width: 12px;
  height: 12px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: dot-bounce 1.2s infinite;
}

.matchmaking__dot:nth-child(2) { animation-delay: 0.2s; }
.matchmaking__dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%           { transform: scale(1); opacity: 1; }
}

.matchmaking__tip {
  background: rgba(88, 204, 2, 0.08);
  border-radius: var(--radius);
  padding: 12px 20px;
  max-width: 280px;
}

.matchmaking__tip-text {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
  transition: opacity 0.3s;
}

/* Oyuncular (Faz 14: game.html'deki lobi kartları game.css'te) */
.lobby__players {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Kelime sayısı ayarı */
.lobby__settings {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.lobby__settings-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.lobby__word-count {
  display: flex;
  gap: 8px;
}

.wc-btn {
  padding: 8px 16px;
  background-color: var(--color-bg);
  border: 2px solid var(--color-surface2);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.wc-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.wc-btn--active {
  border-color: var(--color-primary);
  background-color: var(--color-surface2);
  color: var(--color-text);
}

/* Misafir için bekleme mesajı */
.lobby__waiting-msg {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-style: italic;
  padding: 12px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
}

/* ─── EKRAN GEÇİŞ ANİMASYONU ─────────────────────────── */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.screen--visible {
  animation: fadeIn 0.3s ease;
}

/* Faz 13: Animasyonlu ekran geçişleri (ana ekran ↔ lobi) */
.screen-exit-up {
  animation: exit-up 0.3s ease-in forwards;
}

.screen-exit-down {
  animation: exit-down 0.3s ease-in forwards;
}

.screen-enter-up {
  animation: enter-up 0.3s ease-out forwards;
}

.screen-enter-down {
  animation: enter-down 0.3s ease-out forwards;
}

@keyframes exit-up {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(-30px); opacity: 0; }
}

@keyframes exit-down {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(30px); opacity: 0; }
}

@keyframes enter-up {
  0%   { transform: translateY(30px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes enter-down {
  0%   { transform: translateY(-30px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ─── FAZ 14: RESPONSİVE v2 — ANA EKRAN ──────────────── */

/* Mobil (< 480px) */
@media (max-width: 479px) {
  .home__container {
    padding: 24px 16px;
    border-radius: 0;
    min-height: 100dvh;
    justify-content: center;
    gap: 12px;
  }

  .home__title {
    font-size: clamp(1.8rem, 5vw, 3rem);
  }

  .avatar-selector__selected {
    width: 56px;
    height: 56px;
    font-size: 2rem;
  }

  .avatar-selector__item {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }

  .home__langs {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .lang-btn {
    padding: 12px 8px;
  }

  .lang-btn__flag {
    font-size: 1.5rem;
  }

  .lang-btn__label {
    font-size: 0.75rem;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .home__bg-shape--3 {
    display: none;
  }

  .home__bg-shape--1 {
    width: 250px;
    height: 250px;
  }

  .home__bg-shape--2 {
    width: 200px;
    height: 200px;
  }

  /* Matchmaking ekranı */
  .lobby__container.matchmaking {
    padding: 24px 16px;
    border-radius: 0;
    min-height: 100dvh;
    justify-content: center;
  }
}

/* Tablet (480-767px) */
@media (min-width: 480px) and (max-width: 767px) {
  .home__title {
    font-size: 2.5rem;
  }

  .btn--primary,
  .btn--accent {
    max-width: 280px;
    margin: 0 auto;
  }

  .home__langs {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Desktop (768px+) */
@media (min-width: 768px) {
  .home__title {
    font-size: 3rem;
  }

  .home__container {
    padding: 48px 40px;
  }

  .btn--primary,
  .btn--accent {
    max-width: 320px;
    margin: 0 auto;
  }

  .home__langs {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ─── HAREKET AZALTMA DESTEĞİ ────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}