/* === BẮT ĐẦU CSS MỚI HOÀN CHỈNH === */

/* --- Cài đặt chung, Font & Biến màu --- */
:root {
    --primary-color: #0a2ae4; /* Chuyển sang màu xanh dương hiện đại */
    --primary-color-light: #e7f3ff;
    --background-color: #b4edf1;
    --card-background-color: #ffffff;
    --border-color: #dee2e6;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --hover-overlay: #f0f2f5;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body, html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-size: inherit;
    font-family: inherit;
}

/* --- Cấu trúc Layout chính --- */
.app-layout {
    display: flex;
    height: 100vh;
}

/* --- 1. Sidebar (Bên trái) --- */
.sidebar {
    width: 280px;
    flex-shrink: 0; /* <-- THÊM DÒNG NÀY */
    background-color: var(--card-background-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 28px;
    font-weight: bold;
    color: var(--primary-color);
    justify-content: center;
}

.logo .fa-comments {
    margin-right: 10px;
}

.logout-btn {
    font-size: 18px;
    color: var(--text-secondary);
    transition: color 0.2s;
}
.logout-btn:hover { color: var(--text-primary); }

/* --- Language switcher (login.html & app.html only) --- */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}
.lang-switcher label {
    margin: 0;
    white-space: nowrap;
}
.lang-switcher select {
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--hover-overlay);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}
.lang-switcher select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(10, 42, 228, 0.15);
}
.lang-switcher--sidebar {
    padding: 10px 20px 12px 20px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--card-background-color);
}
.lang-switcher--login {
    justify-content: flex-end;
    margin: 0 0 10px;
}

.user-info {
    padding: 16px 20px;
    font-weight: 600;
    position: relative;
    padding-bottom: 65px; /* Tăng không gian cho nút bấm */
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.phone-numbers-section {
    flex-grow: 1;
    overflow-y: auto;
    padding: 8px;
}

.phone-numbers-section p {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 12px;
    text-transform: uppercase;
}

.phone-number-item {
    padding: 12px 16px;
    margin: 0 8px 4px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    font-weight: 500;
    display: block;
}

.phone-number-item:hover {
    background-color: var(--hover-overlay);
}

.phone-number-item.active {
    background-color: var(--primary-color-light);
    color: var(--primary-color);
    font-weight: 600;
}

/* --- 2. Conversations Panel (Ở giữa) --- */
.conversations-panel {
    width: 360px;
    flex-shrink: 0; /* <-- THÊM DÒNG NÀY */
    border-right: 1px solid var(--border-color);
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
}

.conversations-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.conversations-header h2 { font-size: 20px; font-weight: 600; }

.new-message-btn-main {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.2s;
}
.new-message-btn-main:hover { background-color: #0b5ed7; }
.new-message-btn-main .fa-pen-to-square { margin-right: 1px; }

.search-bar {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.search-bar input {
    width: 100%;
    padding: 10px 16px;
    border-radius: 20px;
    border: none;
    background-color: var(--hover-overlay);
    outline: none;
}

#conversations-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 8px;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 12px;
    margin: 0 4px 4px 4px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}
.conversation-item:hover {
    background-color: var(--hover-overlay);
}
.conversation-item.active {
    background-color: #e9ecef;
}

.convo-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: #e4e6eb;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 20px;
    color: var(--text-primary);
    flex-shrink: 0;
}

.convo-details {
    overflow: hidden;
}
.convo-number {
    font-weight: 600;
}
.convo-preview {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 5px;
}
.empty-list { text-align: center; color: var(--text-secondary); margin-top: 20px; padding: 0 16px; }


/* --- 3. Chat Panel (Bên phải) --- */
.chat-panel {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background-color: #fbfbfc;
}

.welcome-screen {
    flex-grow: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
}
.welcome-screen .fa-comments {
    font-size: 60px;
    color: #ced4da;
    margin-bottom: 20px;
}
.welcome-screen h2 {
    font-size: 22px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.chat-window {
    display: flex;
    flex-direction: column;
    flex: 1; /* <-- THAY ĐỔI QUAN TRỌNG */
    min-height: 0; /* <-- THÊM DÒNG NÀY */
}

.chat-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background-color: #ffffff;
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
}

.messages-container {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message-bubble {
    max-width: 65%;
    padding: 10px 16px;
    border-radius: 18px;
    word-wrap: break-word;
    line-height: 1.4;
}

.message-bubble.sent {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message-bubble.received {
    background-color: #e4e6eb;
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message-bubble.image-only {
    padding: 4px;
    background-color: transparent;
}

.message-bubble.image-only img {
    display: block;
    max-width: 300px;
    height: auto;
    object-fit: cover;
    border-radius: 15px;
}

#send-message-form, #send-new-message-form {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    border-top: 1px solid var(--border-color);
    background-color: #ffffff;
    flex-shrink: 0;
}

#message-input, #new-message-input, #new-recipient-input {
    flex-grow: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 22px;
    background-color: var(--hover-overlay);
    outline: none;
    font-size: 15px;
}

.attach-btn, #send-message-form button[type="submit"], #send-new-message-form button[type="submit"] {
    font-size: 22px;
    color: var(--text-secondary);
    transition: color 0.2s;
    flex-shrink: 0;
}

#send-message-form button[type="submit"], #send-new-message-form button[type="submit"] {
    color: var(--primary-color);
}

.attach-btn:hover, #send-message-form button[type="submit"]:hover, #send-new-message-form button[type="submit"]:hover {
    color: var(--text-primary);
}

.new-message-recipient {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}
.new-message-recipient span {
    font-weight: 600;
}

/* --- Các style cũ cho chức năng đặc biệt --- */
.conversation-item .convo-details {
    position: relative;
    width: 100%;
}
.phone-number-item {
    position: relative;
}
#repay-numbers-btn {
    position: absolute;
    bottom: 12px; left: 20px; right: 20px;
    width: calc(100% - 40px); padding: 10px;
    background-color: #ffc107; color: #212529;
    border-radius: 8px; font-weight: 600; font-size: 14px;
    transition: background-color 0.2s, transform 0.1s;
}
#repay-numbers-btn:hover { background-color: #ffca2c; }
#repay-numbers-btn:active { transform: scale(0.98); }
#repay-numbers-btn:disabled {
    background-color: #6c757d; cursor: not-allowed; color: white;
}
/* --- CSS CHO TRANG ĐĂNG NHẬP --- */
body.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.card {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 32px;
}

.login-card {
    max-width: 400px;
    width: 90%;
}

.login-card h2 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 24px;
    color: #1c1e21;
}

.login-card form input {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}

.login-card form input:focus {
    border-color: var(--primary-color);
}

.login-card form button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.login-card form button:hover {
    background-color: #0b5ed7;
}
/* === BẮT ĐẦU CSS CHO GIAO DIỆN LOGIN GỐC === */

/* --- Cài đặt chung cho trang login gốc --- */
html,
body.login-page-original {
    font-family: 'Roboto', sans-serif;
    background:
        radial-gradient(circle at top left, rgba(79, 70, 229, 0.16), transparent 28%),
        radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.12), transparent 32%),
        linear-gradient(135deg, #f8fafc 0%, #eef2ff 45%, #eff6ff 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 28px;
    box-sizing: border-box;
    overflow: auto !important;
    height: auto !important;
    color: #0f172a;
}

.login-shell {
    width: min(1100px, 100%);
    display: grid;
    grid-template-columns: minmax(320px, 1.1fr) minmax(380px, 460px);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.10);
    backdrop-filter: blur(20px);
}

.login-showcase {
    position: relative;
    padding: 56px 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 26px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(238, 242, 255, 0.96)),
        linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(59, 130, 246, 0.08));
}

.login-showcase::after {
    content: '';
    position: absolute;
    inset: auto -80px -120px auto;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.14);
    filter: blur(10px);
}

.login-showcase__badge {
    display: inline-flex;
    align-self: flex-start;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid rgba(79, 70, 229, 0.18);
    background: rgba(255, 255, 255, 0.72);
    color: #4338ca;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.chatrio-brand {
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: relative;
    z-index: 1;
}

.login-showcase .logo {
    justify-content: flex-start;
    font-size: 30px;
    color: #0f172a;
}

.login-showcase .logo i {
    margin-right: 12px;
    color: #4338ca;
}

.chatrio-heading {
    margin: 0;
    font-size: clamp(36px, 5vw, 52px);
    line-height: 1.05;
    font-weight: 700;
    color: #0f172a;
}

.login-showcase__text {
    max-width: 520px;
    font-size: 16px;
    line-height: 1.7;
    color: #475569;
    position: relative;
    z-index: 1;
}

.login-showcase__stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(120px, 1fr));
    gap: 16px;
    position: relative;
    z-index: 1;
}

.stat-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 20px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(148, 163, 184, 0.14);
}

.stat-card__value {
    font-size: 24px;
    font-weight: 700;
    color: #3730a3;
}

.stat-card__label {
    font-size: 13px;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.login-card-original {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 44px 38px;
    background: rgba(255, 255, 255, 0.96);
    border-left: 1px solid rgba(148, 163, 184, 0.12);
    text-align: left;
}

.login-card-original__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.login-eyebrow {
    margin: 0 0 10px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: #4338ca;
}

.login-panel-title {
    margin: 0;
    font-size: 30px;
    line-height: 1.15;
    color: #0f172a;
    font-weight: 700;
}

.sub-heading {
    margin: 0 0 28px;
    font-size: 14px;
    color: #64748b;
}

.lang-switcher--login {
    margin: 0;
    justify-content: flex-end;
}

.lang-switcher--login label {
    color: #64748b;
}

.lang-switcher--login select {
    background-color: rgba(248, 250, 252, 0.92);
    border-color: rgba(148, 163, 184, 0.22);
    color: #0f172a;
}

.login-form-original .input-group {
    position: relative;
    margin-bottom: 18px;
}

.login-form-original .input-group input {
    width: 100%;
    padding: 24px 16px 12px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 14px;
    font-size: 15px;
    box-sizing: border-box;
    background: rgba(248, 250, 252, 0.98);
    color: #0f172a;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.login-form-original .input-group input::placeholder {
    color: transparent;
}

.login-form-original .input-group input:focus {
    border-color: rgba(2, 132, 199, 0.8);
    box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.12);
    background: rgba(255, 255, 255, 1);
    outline: none;
}

.login-form-original .input-group label {
    position: absolute;
    top: 8px;
    left: 16px;
    font-size: 11px;
    color: #475569;
    pointer-events: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.login-form-original .options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 10px 0 18px;
    font-size: 14px;
    gap: 12px;
}

.login-form-original .options .remember-me {
    display: flex;
    align-items: center;
    color: #334155;
}

.login-form-original .options .remember-me input {
    margin-right: 8px;
    accent-color: #38bdf8;
}

.login-form-original .options a {
    color: #64748b;
}

.login-status {
    margin-bottom: 14px;
}

.login-form-original .btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    margin-bottom: 0;
    letter-spacing: 0.08em;
}

.login-form-original .btn-login {
    background: linear-gradient(135deg, #0ea5e9 0%, #2563eb 45%, #4f46e5 100%);
    color: #fff;
    text-transform: uppercase;
    box-shadow: 0 18px 30px rgba(37, 99, 235, 0.28);
}

.login-form-original .btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 22px 34px rgba(37, 99, 235, 0.34);
}

@media (max-width: 920px) {
    .login-shell {
        grid-template-columns: 1fr;
    }

    .login-showcase {
        padding: 36px 30px 28px;
    }

    .login-card-original {
        border-left: none;
        border-top: 1px solid rgba(148, 163, 184, 0.1);
    }
}

@media (max-width: 560px) {
    html,
    body.login-page-original {
        padding: 16px;
    }

    .login-showcase {
        display: none;
    }

    .login-card-original {
        padding: 28px 22px;
    }

    .login-card-original__top {
        flex-direction: column;
        align-items: stretch;
    }

    .lang-switcher--login {
        justify-content: flex-start;
    }

    .login-form-original .options {
        flex-direction: column;
        align-items: flex-start;
    }
}
/* === KẾT THÚC CSS CHO GIAO DIỆN LOGIN GỐC === */
/* Dán vào cuối file style.css */
/* Dán vào cuối file style.css, thay thế cho khối cũ */


/* === KẾT THÚC CSS MỚI === */