/* ===================================================
   KAIRO Messenger — Mobile & Responsive Styles
   =================================================== */

/* ---------- Dynamic viewport height fix ---------- */
:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --vh: 1vh;
}

html, body {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
}

#app-container .container {
  min-height: 100dvh;
  display: flex;
}

/* ---------- Messages container base ---------- */
.messages-container {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  box-sizing: border-box;
}

.message, .message .bubble {
  max-width: 100%;
  box-sizing: border-box;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

/* ---------- Message input base (all screens) ---------- */
.message-input-container .message-input {
  flex: 1;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: var(--border-radius);
  background: var(--primary-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  outline: none;
  font-size: 1rem;
}

/* ---------- Touch-friendly tap targets ---------- */
.attachment-btn, .voice-btn, .send-btn {
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
}

.page .back-btn,
.chat-header .back-btn {
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Page overlays base ---------- */
.page.active {
  transform: translateX(0);
  display: block;
  z-index: 300;
}

.page .page-header {
  position: sticky;
  top: 0;
  z-index: 310;
  background: var(--primary-bg);
}

/* ---------- Dropdown z-index ---------- */
.chat-dropdown-menu,
.dropdown-menu {
  z-index: 250;
}

/* ====================================================
   DESKTOP (min-width: 769px)
   ==================================================== */
@media (min-width: 769px) {
  .sidebar {
    position: relative;
    width: var(--sidebar-width);
    left: 0;
    box-shadow: none;
  }

  .main-content {
    display: flex !important;
  }

  .chat-header .back-btn {
    display: none !important;
  }

  .app-nav {
    display: flex;
  }

  /* Language switcher in settings on desktop */
  .settings-lang-item {
    display: flex;
  }
}

/* ====================================================
   TABLET (481px–768px)
   ==================================================== */
@media (max-width: 768px) {
  :root {
    --nav-width: 0px;
    --sidebar-width: 100%;
    --header-height: 56px;
    --footer-height: 64px;
  }

  /* --- Hide vertical nav, show bottom nav --- */
  .app-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 56px;
    flex-direction: row;
    border-right: none;
    border-top: 1px solid var(--border-color);
    background-color: var(--primary-bg);
    z-index: 500;
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  body.light-theme .app-nav {
    background-color: var(--secondary-bg);
    border-top-color: var(--border-color);
  }

  .nav-items {
    flex-direction: row;
    margin-top: 0;
    gap: 0;
    justify-content: space-around;
    height: 100%;
  }

  .nav-btn {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
    border-radius: 12px;
  }

  /* --- Container layout --- */
  .container {
    flex-direction: column;
    min-height: 100dvh;
    padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px));
  }

  /* --- Sidebar: full width overlay --- */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100dvh - 56px - env(safe-area-inset-bottom, 0px));
    max-width: none;
    z-index: 200;
    background-color: var(--primary-bg);
    border-right: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  body.light-theme .sidebar {
    background-color: var(--primary-bg) !important;
  }

  .sidebar:not(.active) {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
  }

  .sidebar.active {
    transform: translateX(0);
    opacity: 1;
    pointer-events: all;
  }

  /* --- Main content: toggle visibility --- */
  .main-content {
    display: none !important;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100dvh - 56px - env(safe-area-inset-bottom, 0px));
    z-index: 200;
    background-color: var(--primary-bg);
  }

  .main-content.active {
    display: flex !important;
    flex-direction: column;
  }

  /* --- Chat header --- */
  .chat-header {
    margin: 8px;
    padding: 0 12px;
    height: var(--header-height);
    border-radius: 12px;
  }

  .chat-header .back-btn {
    display: inline-flex !important;
  }

  .main-app-header {
    height: 0;
    padding: 0;
    overflow: hidden;
    margin: 0;
    display: none !important;
  }

  /* --- Chat avatar smaller --- */
  .chat-avatar {
    width: 44px;
    height: 44px;
    min-width: 44px;
    font-size: 1rem;
  }

  /* --- Messages --- */
  .message {
    max-width: 85%;
  }

  .messages-container {
    flex: 1;
    padding: 12px;
    padding-bottom: 16px;
  }

  /* --- Message input --- */
  .message-input-container {
    margin: 0 8px 8px 8px;
    padding: 8px 12px;
    height: auto;
    border-radius: 24px;
    gap: 8px;
    padding-bottom: 8px;
  }

  /* --- Pages (Settings, Profile, etc.) --- */
  .page {
    padding: 16px;
  }

  .page.active {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100dvh - 56px - env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    z-index: 400;
    background-color: var(--primary-bg) !important;
  }

  body.light-theme .page.active {
    background-color: var(--primary-bg) !important;
  }

  .page .page-header {
    padding-top: env(safe-area-inset-top, 0px);
    margin-bottom: 12px;
  }

  .page-title {
    font-size: 1.25rem;
    margin-left: 10px;
  }

  /* --- Modals --- */
  .modal-content {
    width: 95%;
    max-width: 400px;
    padding: 20px;
    max-height: 85dvh;
    overflow-y: auto;
  }

  /* --- Call window --- */
  .call-window {
    width: 95%;
    padding: 20px;
  }

  /* --- Dropdowns --- */
  .dropdown-menu {
    width: calc(100% - 32px);
    left: 16px;
    right: 16px;
    top: var(--header-height);
  }

  .chat-dropdown-menu {
    width: 180px;
    right: 10px;
  }

  /* --- Profile adjustments --- */
  .profile-avatar {
    width: 120px;
    height: 120px;
    font-size: 3rem;
  }

  .profile-name {
    font-size: 1.5rem;
  }

  .profile-info {
    width: 100%;
    max-width: none;
    padding: 16px;
  }

  .profile-actions {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }

  .profile-btn {
    width: 100%;
    text-align: center;
  }

  .edit-form {
    width: 100%;
    max-width: none;
  }

  /* --- Profile navigation --- */
  .profile-navigation {
    flex-wrap: wrap;
    max-width: none;
  }

  .profile-nav-btn {
    flex: 1 0 45%;
    margin: 4px;
  }

  /* --- Group members grid --- */
  .group-members-list {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
  }

  /* --- Settings --- */
  .settings-item {
    padding: 14px 0;
    font-size: 0.95rem;
  }

  .settings-content {
    padding: 0;
  }

  /* --- Search --- */
  .search-container {
    padding: 10px 12px;
  }

  .search-box {
    padding: 8px 12px;
  }

  /* --- App header (sidebar) --- */
  .app-header {
    height: var(--header-height);
    padding: 0 12px;
  }

  .app-header .header-create-chat-btn {
    padding: 6px 10px !important;
    font-size: 0.8rem !important;
  }

  /* --- Welcome message --- */
  .welcome-message {
    padding: 40px 20px;
    text-align: center;
    font-size: 0.95rem;
  }

  /* --- Chat time in sidebar --- */
  .chat-time {
    font-size: 0.75rem;
    white-space: nowrap;
  }

  /* --- Logout button --- */
  .logout-button {
    font-size: 0.85rem;
    padding: 6px 12px;
  }

  /* -- Group members in chat header -- */
  .group-members {
    flex-wrap: wrap;
    gap: 3px;
  }

  /* --- Storage page --- */
  .storage-options {
    flex-direction: column !important;
    gap: 8px !important;
  }

  /* --- About page --- */
  .about-content {
    padding: 16px 0;
  }

  .about-links {
    flex-direction: column;
    gap: 8px;
  }

  /* --- Chat actions (call buttons) --- */
  .chat-actions {
    gap: 4px;
    margin-left: 4px;
  }

  .action-btn {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  /* --- Chat item padding --- */
  .chat-item {
    padding: 10px 12px;
  }
}

/* ====================================================
   SMALL PHONE (max-width: 400px)
   ==================================================== */
@media (max-width: 400px) {
  :root {
    --header-height: 50px;
    --footer-height: 56px;
  }

  .nav-btn {
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }

  .message-input-container {
    margin: 0 4px 4px 4px;
    padding: 6px 8px;
    gap: 6px;
  }

  .message-input-container .message-input {
    min-height: 40px;
    padding: 8px 10px;
    font-size: 0.9rem;
  }

  .attachment-btn, .voice-btn, .send-btn {
    min-width: 40px;
    min-height: 40px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .chat-header {
    margin: 4px;
    padding: 0 8px;
    height: var(--header-height);
  }

  .chat-avatar {
    width: 38px;
    height: 38px;
    min-width: 38px;
    font-size: 0.9rem;
    margin-right: 10px;
  }

  .chat-name {
    font-size: 0.9rem;
  }

  .last-message {
    font-size: 0.8rem;
  }

  .profile-avatar {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
  }

  .profile-name {
    font-size: 1.3rem;
  }

  .page {
    padding: 12px;
  }

  .page-title {
    font-size: 1.1rem;
  }

  .modal-content {
    padding: 16px;
  }

  .modal-title {
    font-size: 1.2rem;
  }

  .form-input, .select-input {
    padding: 10px 12px;
    font-size: 0.9rem;
  }

  .settings-item {
    padding: 12px 0;
    font-size: 0.9rem;
  }

  .call-window {
    padding: 16px;
  }

  .call-avatar {
    width: 90px;
    height: 90px;
    font-size: 2.5rem;
  }

  .call-name {
    font-size: 1.4rem;
    margin-bottom: 16px;
  }

  .call-btn {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }

  .group-members-list {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}

/* ====================================================
   LANDSCAPE PHONE
   ==================================================== */
@media (max-height: 500px) and (orientation: landscape) {
  .app-nav {
    height: 48px;
  }

  .container {
    padding-bottom: calc(48px + env(safe-area-inset-bottom, 0px));
  }

  .sidebar,
  .main-content,
  .page.active {
    height: calc(100dvh - 48px - env(safe-area-inset-bottom, 0px));
  }

  .profile-avatar {
    width: 80px;
    height: 80px;
    font-size: 2rem;
    margin-bottom: 12px;
  }

  .call-avatar {
    width: 70px;
    height: 70px;
    font-size: 2rem;
  }
}

/* ====================================================
   SAFE AREA SUPPORT
   ==================================================== */
@supports (padding: max(0px)) {
  .message-input-container {
    padding-bottom: max(8px, env(safe-area-inset-bottom));
  }

  .page .page-header {
    padding-top: max(0px, env(safe-area-inset-top));
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
}

/* ====================================================
   LANGUAGE SWITCHER IN SETTINGS (Mobile-Friendly)
   ==================================================== */
.settings-lang-item {
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}

.settings-lang-item > span {
  margin-bottom: 10px;
  display: block;
  font-weight: 500;
}

.settings-lang-switcher {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.settings-lang-switcher .lang-btn {
  flex: 1;
  padding: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.settings-lang-switcher .lang-btn.active {
  background-color: var(--accent-color);
  color: white;
}

/* ====================================================
   SMOOTH TRANSITIONS
   ==================================================== */
.sidebar,
.main-content,
.page {
  transition: transform 0.25s ease, opacity 0.25s ease;
}