/* =====================================================
   GLOBAL RESET
   ===================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background-color: #1b1e24 !important;
    overflow-x: hidden;
	font-size: 16px; /* 🔑 NGƯỠNG iOS */
    font-family: system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}


/* =====================================================
   APP CONTAINER (CHUẨN DUY NHẤT)
   ===================================================== */

.tuvdt-app-container {
    max-width: 960px;
    width: 100%;
    margin: 0 auto;

    padding-left: 12px;
    padding-right: 12px;

    /* 👇 NỀN TRANG CHÍNH */
    background-image: url('/image/hinh14.jpg');
    background-repeat: repeat;
    background-size: 100%;

    min-height: 100vh;
}



/* =====================================================
   HEADER / MAIN / FOOTER
   (KHÔNG ĐƯỢC PADDING NGANG)
   ===================================================== */

header,
main,
footer {
    padding-left: 0 !important;
    padding-right: 0 !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}


/* Nếu header/footer có bootstrap container */
header .container,
footer .container,
header .row,
footer .row {
    padding-left: 0 !important;
    padding-right: 0 !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}


/* =====================================================
   CHATROOM CARD
   ===================================================== */

#community-room {
    height: 70vh;
    display: flex;
    flex-direction: column;

    background: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 8px;

    overflow: hidden;
}


/* =====================================================
   CHAT TIMELINE
   (KHÔNG PADDING NGANG – CHỈ TRÊN/DƯỚI)
   ===================================================== */

#community-timeline,
.chat-timeline {
    flex: 1;
    width: 100%;
    overflow-y: auto;

    padding-top: 12px;
    padding-bottom: 12px;
    padding-left: 0;
    padding-right: 0;
}


/* =====================================================
   CHAT LINE (NỘI DUNG CHAT)
   ===================================================== */

.chat-line {
    margin-bottom: 6px;
    padding-left: 12px;
    padding-right: 12px;

    font-size: 16px;        /* 🔥 THAY 0.9rem */
    line-height: 1.6;
    color: #212529;
}


.chat-line b {
    font-weight: 600;
}


/* =====================================================
   DIRECTIVE
   ===================================================== */

.chat-line .directive-mark {
    color: #0d6efd !important;
    cursor: pointer !important;
    font-family: monospace;
    font-weight: 600;
    text-decoration: underline;

    background: rgba(13, 110, 253, 0.08);
    padding: 2px 4px;
    border-radius: 4px;
}

.chat-line .directive-mark:hover {
    color: #084298 !important;
    background: rgba(13, 110, 253, 0.18);
}


/* =====================================================
   SYSTEM BLOCK (CANVAS / LÁ SỐ)
   ===================================================== */

.system-block {
    margin: 16px auto;
    padding: 8px;

    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
}

.system-block canvas {
    width: 794px;
    max-width: none;
    display: block;
    margin: 0 auto;
}


/* =====================================================
   INPUT BAR
   ===================================================== */

#community-input-bar,
.chat-input {
    border-top: 1px solid #dee2e6;

    /* không padding ngang */
    padding-top: 8px;
    padding-bottom: 8px;
    padding-left: 0;
    padding-right: 0;

    background: #ffffff;
}

#community-input-bar input,
.chat-input input {
    width: 100%;
    margin-left: 12px;
    margin-right: 12px;
}


/* =====================================================
   FOOTER NOTE
   ===================================================== */

.chatroom-footer-note {
    text-align: center;
    font-size: 0.85rem;
    color: #666;
    margin-top: 8px;
}


/* =====================================================
   MOBILE (CHỐT CUỐI)
   ===================================================== */

@media (max-width: 576px) {

    .tuvdt-app-container {
        padding-left: 10px;
        padding-right: 10px;
    }

    .chat-line {
        padding-left: 10px;
        padding-right: 10px;
    }

    #community-room {
        height: 65vh;
        border-radius: 6px;
    }
}

/* =====================================================
   FORCE HEADER NAVBAR DARK (#1b1e24)
   ===================================================== */

header,
header nav,
header .navbar,
header .navbar *,
header .container,
header .container-fluid {
    background-color: #1b1e24 !important;
}

/* chữ navbar */
header,
header a,
header span,
header i,
header .navbar-brand,
header .nav-link {
    color: #e9ecef !important;
}

/* hover */
header a:hover,
header .nav-link:hover {
    color: #ffffff !important;
}

@media (max-width: 768px) {

  #community-timeline {
    font-size: 18px;      /* ÉP CỨNG – iOS safe */
    line-height: 1.6;
  }

  .chat-line {
    font-size: 18px;      /* ❗ KHÔNG DÙNG em */
    line-height: 1.6;
  }

  .chat-line b {
    font-size: 18px;
  }

  .directive-link,
  .directive-mark {
    font-size: 18px;
    font-weight: 600;
  }
}


html {
  -webkit-text-size-adjust: 100%;
}

/* ===============================
   CHATROOM TYPOGRAPHY BASELINE
   =============================== */

#community-room {
    font-size: 16px;
    line-height: 1.6;
}

#community-room b {
    font-weight: 600;
    font-size: 16px;
}

@media (max-width: 576px) {
  #community-room {
    font-size: 17px;     /* 👈 giống trang chính */
  }

  .chat-line {
    font-size: 17px;
    line-height: 1.65;
  }

  .directive-mark,
  .directive-link {
    font-size: 16.5px;
  }
}
@media (max-width: 576px) {

  /* Container ngoài: bỏ padding để rộng hết */
  .tuvdt-app-container {
    padding-left: 0;
    padding-right: 0;
  }

  /* Chatroom chiếm gần full màn hình */
  #community-room {
    height: calc(100vh - 120px); 
    /* 120px = header + greeting + footer note */
    border-radius: 0;
    margin: 0;
  }
}