:root {
    /* WhatsApp Colors */
    --wa-teal-dark: #075E54;
    --wa-teal: #128C7E;
    --wa-green: #25D366;
    --wa-light-green: #dcf8c6;
    --wa-bg: #E5DDD5;
    
    /* General Colors */
    --bg-main: #f0f2f5;
    --card-bg: #ffffff;
    --text-main: #111b21;
    --text-muted: #667781;
    --border-color: #d1d7db;
    --error-color: #ea0038;
    
    --sidebar-width: 260px;
}

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

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

/* Layout */
.dashboard-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--wa-teal);
    color: white;
}

.sidebar-header i {
    font-size: 1.8rem;
    color: var(--wa-green);
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s;
}

.nav-item i {
    width: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.nav-item:hover {
    background-color: var(--bg-main);
}

.nav-item.active {
    background-color: #f0f2f5;
    border-left: 4px solid var(--wa-teal);
    color: var(--wa-teal);
}
.nav-item.active i {
    color: var(--wa-teal);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    position: relative;
    background-color: var(--bg-main);
}

.view-section {
    display: none;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

.view-section.active {
    display: block;
}

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

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.view-header h1 {
    font-size: 1.75rem;
    color: var(--text-main);
    font-weight: 600;
}

/* Cards & Grids */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(11, 20, 26, 0.05);
}

.full-width-card {
    width: 100%;
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
}

.card h2 i {
    color: var(--wa-teal);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* Forms */
.stacked-form .form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.text-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.text-input:focus {
    outline: none;
    border-color: var(--wa-teal);
    box-shadow: 0 0 0 3px rgba(18, 140, 126, 0.1);
}

.file-drop-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
    background-color: #fafafa;
    transition: border-color 0.2s;
}

.file-drop-area:hover {
    border-color: var(--wa-teal);
}

.file-icon {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: block;
}

.file-drop-area input[type="file"] {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; cursor: pointer;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.w-100 { width: 100%; }

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.primary-btn {
    background-color: var(--wa-teal);
    color: white;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--wa-teal-dark);
}

.secondary-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.secondary-btn:hover {
    background-color: var(--bg-main);
}

.outline-btn {
    background-color: transparent;
    color: var(--wa-teal);
    border: 1px solid var(--wa-teal);
}
.outline-btn:hover:not(:disabled) {
    background-color: rgba(18, 140, 126, 0.1);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th, .data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 500;
    color: var(--text-muted);
    background-color: #fafafa;
}

.data-table tbody tr:hover {
    background-color: #f9f9f9;
}

/* Send Message Layout */
.send-message-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}
.small-table { max-height: 400px; overflow-y: auto; }

/* Pagination */
.pagination-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
}
.btn-group { display: flex; gap: 0.5rem; }

/* Status */
.status-msg { margin-top: 1rem; font-size: 0.9rem; }
.status-msg.success { color: var(--wa-teal-dark); }
.status-msg.error { color: var(--error-color); }

/* Templates List */
.templates-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.template-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    background: #fafafa;
}

.template-item h4 {
    color: var(--wa-teal);
    margin-bottom: 0.5rem;
}

.template-item p {
    font-size: 0.9rem;
    color: var(--text-main);
    white-space: pre-wrap;
}

/* Conversations View */
.conversations-layout {
    display: flex;
    height: calc(100vh - 12rem);
    padding: 0;
    overflow: hidden;
}

.chat-list-sidebar {
    width: 300px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    background: #ffffff;
}

.chat-list-header {
    padding: 1rem;
    background-color: #f0f2f5;
    border-bottom: 1px solid var(--border-color);
}

.chat-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
}

.chat-list-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s;
}

.chat-list-item:hover {
    background-color: #f5f6f6;
}
.chat-list-item.active {
    background-color: #ebebeb;
}

.chat-list-item-name {
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.chat-list-item-phone {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.chat-view-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--wa-bg);
}

.chat-view-header {
    padding: 1rem 1.5rem;
    background-color: #f0f2f5;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.chat-messages-container {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background-image: url('https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png');
    background-size: contain;
}

.empty-chat-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
}

.empty-chat-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.message-bubble {
    max-width: 65%;
    padding: 0.5rem 0.75rem;
    border-radius: 7.5px;
    font-size: 0.95rem;
    position: relative;
    box-shadow: 0 1px 0.5px rgba(11,20,26,.13);
}

.message-incoming {
    align-self: flex-start;
    background-color: #ffffff;
    border-top-left-radius: 0;
}

.message-outgoing {
    align-self: flex-end;
    background-color: var(--wa-light-green);
    border-top-right-radius: 0;
}

.message-time {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 0.25rem;
}