/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    font-family: "Inter", "Segoe UI", sans-serif;
    background: #0d1117;
    color: #e6edf3;
    line-height: 1.6;
}
a { color: #58a6ff; text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Header === */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 2rem;
    background: #161b22;
    border-bottom: 1px solid #30363d;
}
.app-header__title { display: flex; align-items: center; gap: 0.75rem; }
.app-header__app-name { font-size: 1.1rem; font-weight: 600; }
.app-header__nav { display: flex; gap: 0; }
.nav-tab {
    padding: 0.5rem 1.25rem;
    color: #8b949e;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}
.nav-tab:hover, .nav-tab.active {
    color: #e6edf3;
    border-bottom-color: #58a6ff;
    text-decoration: none;
}

/* === App Content === */
.app-content {
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}
.app-header { height: 52px; flex-shrink: 0; }

/* === Chat Container === */
.chat-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100%;
    min-height: 0;
}
.chat-sidebar {
    background: #161b22;
    border-right: 1px solid #30363d;
    padding: 1rem;
    overflow-y: auto;
}
.phone-input-group { margin-bottom: 1rem; }
.phone-input-group label {
    display: block;
    font-size: 0.85rem;
    color: #8b949e;
    margin-bottom: 0.3rem;
}
.phone-input-group input {
    width: 100%;
    padding: 0.5rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
    margin-bottom: 0.5rem;
}
.conversations-list { display: flex; flex-direction: column; gap: 0.25rem; }
.conv-item {
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    color: #c9d1d9;
    font-size: 0.9rem;
}
.conv-item:hover { background: rgba(88, 166, 255, 0.08); }
.conv-item.active { background: rgba(88, 166, 255, 0.15); color: #e6edf3; }

/* === Chat Main === */
.chat-main { display: flex; flex-direction: column; height: 100%; min-height: 0; overflow: hidden; }
.chat-header {
    padding: 0.75rem 1.5rem;
    background: #161b22;
    border-bottom: 1px solid #30363d;
    font-weight: 600;
    flex-shrink: 0;
}
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-height: 0;
}
.chat-input-area { flex-shrink: 0; }

/* === Chat Bubbles === */
.bubble {
    max-width: 65%;
    padding: 0.6rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.4;
    word-wrap: break-word;
}
.bubble--incoming {
    align-self: flex-end;
    background: #1f6feb;
    color: #fff;
    border-bottom-right-radius: 4px;
}
.bubble--outgoing {
    align-self: flex-start;
    background: #30363d;
    color: #e6edf3;
    border-bottom-left-radius: 4px;
}
.bubble__meta {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.5);
    margin-top: 0.25rem;
}
.bubble--outgoing .bubble__meta { color: #8b949e; }
.bubble__file {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    opacity: 0.9;
}

/* === Markdown inside chat bubbles === */
.bubble__markdown { line-height: 1.5; }
.bubble__markdown p { margin: 0 0 0.5em; }
.bubble__markdown p:last-child { margin-bottom: 0; }
.bubble__markdown h1, .bubble__markdown h2, .bubble__markdown h3 {
    margin: 0.6em 0 0.3em;
    font-size: 1em;
    font-weight: 700;
}
.bubble__markdown h1 { font-size: 1.1em; }
.bubble__markdown h2 { font-size: 1.05em; }
.bubble__markdown ul, .bubble__markdown ol {
    margin: 0.3em 0;
    padding-left: 1.4em;
}
.bubble__markdown li { margin-bottom: 0.2em; }
.bubble__markdown strong { font-weight: 700; }
.bubble__markdown em { font-style: italic; }
.bubble__markdown code {
    background: rgba(0,0,0,0.2);
    padding: 0.1em 0.3em;
    border-radius: 3px;
    font-size: 0.88em;
    font-family: "SF Mono", "Fira Code", monospace;
}
.bubble__markdown pre {
    background: rgba(0,0,0,0.25);
    padding: 0.5em 0.75em;
    border-radius: 6px;
    overflow-x: auto;
    margin: 0.4em 0;
}
.bubble__markdown pre code {
    background: none;
    padding: 0;
}
.bubble__markdown blockquote {
    border-left: 3px solid rgba(255,255,255,0.3);
    margin: 0.4em 0;
    padding-left: 0.75em;
    opacity: 0.9;
}
.bubble__markdown table {
    border-collapse: collapse;
    margin: 0.4em 0;
    font-size: 0.88em;
    width: 100%;
}
.bubble__markdown th, .bubble__markdown td {
    border: 1px solid rgba(255,255,255,0.2);
    padding: 0.3em 0.5em;
    text-align: left;
}
.bubble__markdown th {
    background: rgba(0,0,0,0.15);
    font-weight: 600;
}
.bubble__markdown hr {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.2);
    margin: 0.5em 0;
}

/* === Chat Input === */
.chat-input-area {
    padding: 0.75rem 1.5rem;
    background: #161b22;
    border-top: 1px solid #30363d;
}
.chat-input-row { display: flex; gap: 0.5rem; align-items: center; }
.chat-input-row input[type="text"] {
    flex: 1;
    padding: 0.6rem 0.75rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 8px;
    color: #e6edf3;
    font-size: 0.95rem;
}
.file-upload-btn {
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.4rem;
    border-radius: 6px;
    transition: background 0.2s;
}
.file-upload-btn:hover { background: rgba(255,255,255,0.1); }
.file-preview {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.4rem 0.75rem;
    background: rgba(88, 166, 255, 0.1);
    border-radius: 6px;
    font-size: 0.85rem;
    color: #58a6ff;
}
.btn-clear {
    background: none;
    border: none;
    color: #8b949e;
    cursor: pointer;
    font-size: 1.1rem;
}

/* === Buttons === */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}
.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: #238636; color: #fff; }
.btn-send { background: #1f6feb; color: #fff; }

/* === B2B page (Task 7) === */
.b2b-container {
    display: grid;
    grid-template-columns: 340px 1fr;
    height: 100%;
    gap: 0;
}
.b2b-sidebar {
    background: #161b22;
    border-right: 1px solid #30363d;
    padding: 1.5rem;
    overflow-y: auto;
}
.b2b-main {
    padding: 1.5rem;
    overflow-y: auto;
}
.b2b-sidebar h2 {
    margin: 0 0 1rem;
    font-size: 1.1rem;
    color: #58a6ff;
}
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    color: #8b949e;
    margin-bottom: 0.3rem;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 0.5rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
}
.log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.log-table th, .log-table td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid #21262d;
}
.log-table th {
    background: rgba(255,255,255,0.03);
    position: sticky;
    top: 0;
    font-weight: 600;
    color: #8b949e;
}
.status-badge {
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}
.status-pending  { background: rgba(251,191,36,0.2);  color: #fbbf24; }
.status-sent     { background: rgba(56,189,248,0.2);  color: #38bdf8; }
.status-completed{ background: rgba(74,222,128,0.2);  color: #4ade80; }
.status-error    { background: rgba(248,113,113,0.2); color: #f87171; }
.status-info     { background: rgba(88,166,255,0.2);  color: #58a6ff; }

/* === Email Simulator === */
.email-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: 100%;
    min-height: 0;
}
.email-sidebar {
    background: #161b22;
    border-right: 1px solid #30363d;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}
.email-sidebar__start {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}
.email-sidebar__input {
    flex: 1;
    padding: 0.5rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
    font-size: 0.9rem;
}
.email-sidebar__btn {
    padding: 0.5rem 0.75rem;
    background: #238636;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    white-space: nowrap;
}
.email-sidebar__btn:hover { opacity: 0.85; }
.email-sidebar__label {
    font-size: 0.8rem;
    color: #8b949e;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}
.email-sidebar__threads {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Thread items */
.thread-item {
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
}
.thread-item:hover { background: rgba(88, 166, 255, 0.08); }
.thread-item--active { background: rgba(88, 166, 255, 0.15); }
.thread-item__subject {
    font-size: 0.9rem;
    font-weight: 600;
    color: #e6edf3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.thread-item__snippet {
    font-size: 0.8rem;
    color: #8b949e;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}
.thread-item__meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #6e7681;
    margin-top: 4px;
}

/* Email main area */
.email-main {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}
.email-main__header {
    padding: 0.75rem 1.5rem;
    background: #161b22;
    border-bottom: 1px solid #30363d;
    flex-shrink: 0;
}
.email-main__subject {
    font-weight: 600;
    font-size: 1rem;
}
.email-main__messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 0;
}

/* Email message cards */
.email-card {
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid #30363d;
}
.email-card--incoming {
    background: #1c2333;
    border-left: 3px solid #1f6feb;
}
.email-card--outgoing {
    background: #1c2d1c;
    border-left: 3px solid #238636;
}
.email-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}
.email-card__from {
    font-weight: 600;
    font-size: 0.85rem;
    color: #e6edf3;
}
.email-card__time {
    font-size: 0.75rem;
    color: #8b949e;
}
.email-card__subject {
    font-size: 0.8rem;
    color: #58a6ff;
    margin-bottom: 0.5rem;
}
.email-card__body {
    font-size: 0.9rem;
    line-height: 1.5;
    color: #c9d1d9;
    word-wrap: break-word;
}
.email-card__body p { margin: 0 0 0.5em; }
.email-card__body p:last-child { margin-bottom: 0; }
.email-card__attachments {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.email-card__attachment {
    font-size: 0.8rem;
    color: #58a6ff;
    background: rgba(88, 166, 255, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

/* Compose area */
.email-compose {
    flex-shrink: 0;
    padding: 0.75rem 1.5rem;
    background: #161b22;
    border-top: 1px solid #30363d;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.email-compose__subject {
    padding: 0.5rem 0.75rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
    font-size: 0.9rem;
}
.email-compose__subject:read-only {
    background: #161b22;
    color: #8b949e;
}
.email-compose__body {
    padding: 0.5rem 0.75rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
    font-size: 0.9rem;
    resize: vertical;
    font-family: inherit;
}
.email-compose__actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.email-compose__file-label {
    cursor: pointer;
    font-size: 0.85rem;
    color: #58a6ff;
    padding: 0.4rem 0.75rem;
    background: rgba(88, 166, 255, 0.1);
    border-radius: 6px;
    transition: background 0.15s;
}
.email-compose__file-label:hover { background: rgba(88, 166, 255, 0.2); }
.email-compose__file-label input[type="file"] { display: none; }
.email-compose__send {
    padding: 0.5rem 1.25rem;
    background: #1f6feb;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
}
.email-compose__send:hover { opacity: 0.85; }