:root {
    --wa-dark: #00a884;
    --wa-darker: #008069;
    --wa-bg: #efeae2;
    --wa-panel-bg: #f0f2f5;
    --wa-header-bg: #f0f2f5;
    --wa-msg-in: #ffffff;
    --wa-msg-out: #d9fdd3;
    --text-primary: #111b21;
    --text-secondary: #667781;
    --border-color: #d1d7db;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
    background-color: #d1d7db; /* Fond gris derrière l'app */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* Conteneur principal */
.app-container {
    display: flex;
    width: 100vw;       /* Modifié : Prend 100% de la largeur de la fenêtre */
    max-width: 100%;    /* Modifié : Enlève la limite de 1600px */
    height: 100vh;
    background-color: #ffffff;
    box-shadow: 0 1px 1px 0 rgba(0,0,0,.06), 0 2px 5px 0 rgba(0,0,0,.2);
    overflow: hidden;
}

/* Sidebar très fine (Menu) */
.side-nav {
    width: 60px;
    background-color: var(--wa-header-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.nav-icon {
    font-size: 22px;
    color: #54656f;
    margin-bottom: 30px;
    cursor: pointer;
    transition: 0.2s;
}

.nav-icon:hover, .nav-icon.active {
    color: var(--wa-dark);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
}

/* Panneau Gauche (Liste) */
.sidebar-content {
    width: 350px;
    background-color: #ffffff;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 15px 20px;
    background-color: var(--wa-header-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.search-bar {
    padding: 10px;
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
}

.search-input {
    background-color: var(--wa-panel-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    padding: 5px 15px;
}

.search-input input {
    border: none;
    background: transparent;
    padding: 8px;
    width: 100%;
    outline: none;
}

.chat-list {
    flex: 1;
    overflow-y: auto;
}

.chat-item {
    display: flex;
    padding: 12px 15px;
    border-bottom: 1px solid var(--wa-panel-bg);
    cursor: pointer;
    transition: background 0.2s;
}

.chat-item:hover {
    background-color: var(--wa-panel-bg);
}

.chat-item-info {
    flex: 1;
    margin-left: 15px;
}

.chat-item-top {
    display: flex;
    justify-content: space-between;
}

.chat-item-name {
    font-weight: 500;
    color: var(--text-primary);
}

.chat-item-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.chat-item-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3px;
}

.chat-item-msg {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.unread-badge {
    background-color: var(--wa-dark);
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 50%;
    font-weight: bold;
}

/* Panneau Droit (Fenêtre de Chat) */
.main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-image: url('https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png'); /* Pattern WhatsApp */
    background-color: var(--wa-bg);
}

.chat-header {
    padding: 10px 20px;
    background-color: var(--wa-header-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.chat-contact-details h3 {
    font-size: 16px;
    font-weight: 500;
}

.chat-contact-details p {
    font-size: 13px;
    color: var(--text-secondary);
}

.chat-header-actions i {
    font-size: 20px;
    color: #54656f;
    margin-left: 20px;
    cursor: pointer;
}

.chat-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
}

/* Bulles de messages */
.message {
    max-width: 65%;
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 10px;
    position: relative;
    box-shadow: 0 1px 1px rgba(0,0,0,0.1);
}

.message.inbound {
    background-color: var(--wa-msg-in);
    align-self: flex-start;
    border-top-left-radius: 0;
}

.message.outbound {
    background-color: var(--wa-msg-out);
    align-self: flex-end;
    border-top-right-radius: 0;
}

.message-time {
    font-size: 11px;
    color: #667781;
    float: right;
    margin-left: 15px;
    margin-top: 5px;
}

.date-separator {
    text-align: center;
    margin: 15px 0;
}

.date-separator span {
    background-color: #ffffff;
    padding: 5px 12px;
    border-radius: 10px;
    font-size: 12px;
    color: #54656f;
    box-shadow: 0 1px 1px rgba(0,0,0,0.05);
}

/* Footer (Zone de saisie) */
.chat-footer {
    padding: 10px 20px;
    background-color: var(--wa-header-bg);
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-icons i {
    font-size: 24px;
    color: #54656f;
    cursor: pointer;
}

.pdf-quick-send {
    display: flex;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.pdf-quick-send input {
    border: none;
    padding: 8px;
    width: 140px;
    outline: none;
}

.pdf-quick-send button {
    background-color: #e53935;
    color: white;
    border: none;
    padding: 0 10px;
    cursor: pointer;
}

.message-input-container {
    flex: 1;
    background-color: #ffffff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    padding: 8px 15px;
}

.message-input-container input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
}

.message-input-container i {
    color: #54656f;
    cursor: pointer;
    margin-left: 10px;
}

.btn-send {
    background: none;
    border: none;
    color: #54656f;
    font-size: 24px;
    cursor: pointer;
}

/* Panneaux secondaires (Contacts, Stats) */
.main-content-panel {
    flex: 1;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 20px;
    background-color: var(--wa-header-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.table-container {
    padding: 20px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--wa-panel-bg);
    font-weight: 500;
}

.btn-primary { background-color: var(--wa-dark); color: white; border: none; padding: 8px 15px; border-radius: 5px; cursor: pointer; }
.btn-secondary { background-color: #54656f; color: white; border: none; padding: 8px 15px; border-radius: 5px; cursor: pointer; }
.stat-badge { background: #eee; padding: 5px 10px; border-radius: 15px; margin-right: 10px; font-size: 14px; }
.stat-card { background: #f9f9f9; padding: 20px; border-radius: 10px; width: 30%; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }