:root {
    --primary: #111111;
    --primary-dark: #000000;
    --background: #ffffff;
    --panel: #ffffff;
    --border: #dce4eb;
    --text: #17212b;
    --muted: #6d7b88;
    --success: #20b15a;
    --error: #df3e4f;
    --agent-bg: transparent;
    --shadow: 0 8px 28px rgba(24, 54, 84, 0.06);
}

/* Synchron-X application shell */
.app-shell {
    height: 100dvh;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    background: #fff;
}

.sidebar {
    min-width: 0;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: #212121;
    background: #f7f7f8;
    border-right: 1px solid #ececec;
}

.sidebar-brand {
    min-height: 46px;
    padding: 8px 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 750;
}

.sidebar-brand > span:last-child {
    min-width: 0;
}

.sidebar-brand strong,
.sidebar-brand small {
    display: block;
}

.sidebar-brand small {
    margin-top: 2px;
    overflow: hidden;
    color: #6f6f74;
    font-size: 10px;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar button {
    width: 100%;
    border: 0;
    cursor: pointer;
    color: inherit;
    background: transparent;
    text-align: left;
}

.new-chat,
.sidebar-nav button {
    min-height: 42px;
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-radius: 10px !important;
}

.new-chat:hover,
.sidebar-nav button:hover,
.conversation:hover,
.profile-button:hover {
    background: #e9e9eb;
}

.sidebar-nav {
    display: grid;
    gap: 2px;
}

.sidebar-nav .sidebar-nav-label {
    padding: 12px 12px 4px;
    color: #77777c;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.sidebar-nav i {
    width: 20px;
    text-align: center;
}

.sidebar-section {
    min-height: 0;
    flex: 1;
    margin-top: 14px;
    overflow-y: auto;
}

.sidebar-section > span {
    padding: 8px 12px;
    display: block;
    color: #707070;
    font-size: 12px;
    font-weight: 650;
}

.conversation {
    padding: 10px 12px;
    border-radius: 9px !important;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation.active {
    background: #e9e9eb;
}

.profile-button {
    min-height: 54px;
    padding: 7px 9px;
    display: grid;
    grid-template-columns: 34px 1fr 20px;
    align-items: center;
    gap: 9px;
    border-radius: 11px !important;
}

.profile-avatar {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    background: #111;
    font-weight: 750;
}

.profile-button strong,
.profile-button small {
    display: block;
}

.profile-button small {
    margin-top: 2px;
    color: #777;
    font-size: 11px;
}

.chatPanel {
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: #fff;
}

.chat-toolbar {
    border-bottom: 0;
    padding: 8px 18px;
}

.model-title {
    min-width: 0;
}

.model-title strong,
.model-title small {
    display: block;
}

.model-title strong {
    font-size: 16px;
    font-weight: 750;
    letter-spacing: .01em;
}

.model-title small {
    margin-top: 1px;
    color: #737373;
    font-size: 11px;
    font-weight: 550;
}

.model-title i {
    margin-left: 4px;
    color: #777;
    font-size: 10px;
}

.mobile-menu {
    display: none;
    border: 0;
    background: transparent;
    font-size: 18px;
}

.status-indicator {
    padding: 7px 10px;
    background: transparent;
}

#chatMessages {
    width: min(100%, 800px);
    margin: 0 auto;
    padding: 28px 20px 16px;
}

.message {
    font-size: 16px;
    line-height: 1.65;
}

.message.user {
    padding: 10px 16px;
    background: #f0f0f0;
    border-radius: 20px;
}

.assistant-turn {
    width: 100%;
}

.message.agent {
    padding: 8px 0;
}

.composer-wrap {
    width: min(100%, 800px);
    margin: 0 auto;
    padding: 10px 20px max(10px, env(safe-area-inset-bottom));
}

.chat-input-area {
    min-height: 58px;
    padding: 8px 9px;
    gap: 5px;
    border: 1px solid #d9d9d9;
    border-radius: 28px;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.07);
}

.chat-input-area input {
    min-width: 0;
    flex: 1;
    border: 0;
    outline: 0;
    padding: 8px;
    color: #222;
    background: transparent;
}

.attach-btn,
.voice-btn,
#sendBtn {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
}

.attach-btn,
.voice-btn {
    color: #303030;
    background: transparent;
}

#sendBtn {
    color: #fff;
    background: #111;
}

#sendBtn span {
    display: none;
}

.composer-note {
    padding-top: 7px;
    color: #777;
    font-size: 11px;
    text-align: center;
}

.statusPanel {
    width: 340px;
    max-width: calc(100vw - 24px);
    position: fixed;
    top: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 50;
    display: none;
    overflow: hidden;
    border: 1px solid #ddd;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 20px 60px rgba(0,0,0,.18);
}

.statusPanel.mobile-visible {
    display: flex;
}

@media (max-width: 760px) {
    .app-shell {
        display: block;
    }

    .sidebar {
        display: none;
    }

    .chatPanel {
        height: 100dvh;
    }

    .mobile-menu {
        display: block;
    }

    .chat-toolbar {
        min-height: 56px;
        padding: 7px 12px;
    }

    .status-indicator {
        padding: 6px;
    }

    .model-title small {
        font-size: 10px;
    }

    #agentStatusText {
        display: none;
    }

    #chatMessages {
        padding: 18px 14px 8px;
    }

    .user-turn {
        max-width: 88%;
    }

    .composer-wrap {
        padding: 8px 10px max(8px, env(safe-area-inset-bottom));
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--background);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
}

.topbar {
    min-height: 68px;
    padding: 10px max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-shrink: 0;
    color: #111;
    background: #fff;
    border-bottom: 1px solid #e7e7e7;
    box-shadow: none;
    z-index: 20;
}

.brand {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    font-size: 25px;
    color: #111;
}

.brand-name {
    font-size: 21px;
    line-height: 1.05;
    font-weight: 750;
    letter-spacing: -0.4px;
}

.brand-subtitle {
    margin-top: 3px;
    font-size: 11px;
    opacity: 0.8;
}

.status-indicator {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 11px;
    border-radius: 999px;
    color: #4f5b65;
    background: #f3f4f5;
    font-size: 12px;
    font-weight: 650;
}

#agentStatusDot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #9aa6b2;
}

#agentStatusDot.online {
    background: #35d16f;
    box-shadow: 0 0 0 4px rgba(53, 209, 111, 0.16);
}

#agentStatusDot.offline {
    background: #ff6472;
}

.layout {
    min-height: 0;
    flex: 1;
    display: grid;
    grid-template-columns: 250px minmax(360px, 1fr) 290px;
    grid-template-areas: "project chat status";
    gap: 14px;
    padding: 14px;
}

.panel {
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.projectPanel {
    grid-area: project;
}

.chatPanel {
    grid-area: chat;
}

.statusPanel {
    grid-area: status;
}

.panel-header {
    min-height: 54px;
    padding: 15px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    color: #44515e;
    font-size: 13px;
    font-weight: 750;
    text-transform: uppercase;
    letter-spacing: 0.7px;
}

.panel-content {
    padding: 16px;
    overflow-y: auto;
}

.project-summary h2 {
    margin: 14px 0 10px;
    font-size: 20px;
}

.project-summary p {
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.phase-badge {
    display: inline-flex;
    padding: 7px 10px;
    border-radius: 999px;
    color: #343a40;
    background: #f0f1f2;
    font-size: 12px;
    font-weight: 750;
}

.chat-toolbar {
    min-height: 62px;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.chat-toolbar strong {
    display: block;
    font-size: 17px;
}

.chat-toolbar > div > span {
    display: block;
    margin-top: 2px;
    color: var(--muted);
    font-size: 12px;
}

.toolbar-actions {
    display: flex;
    gap: 7px;
}

.tool-btn,
.close-btn {
    border: 0;
    cursor: pointer;
}

.tool-btn {
    min-height: 38px;
    padding: 8px 11px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border-radius: 11px;
    color: #30363b;
    background: #f1f2f3;
    font-size: 13px;
    font-weight: 700;
}

.tool-btn:active {
    transform: scale(0.97);
}

#chatMessages {
    min-height: 0;
    flex: 1;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scroll-behavior: smooth;
}

.message {
    max-width: 82%;
    padding: 11px 14px;
    border-radius: 17px;
    font-size: 19px;
    line-height: 1.55;
    overflow-wrap: anywhere;
}

.assistant-turn {
    width: min(86%, 760px);
    align-self: flex-start;
}

.assistant-turn .message {
    max-width: none;
    width: 100%;
}

.conversation-persistence-warning {
    margin-top: 8px;
    padding: 10px 12px;
    border: 1px solid #d9902f;
    border-radius: 12px;
    color: #6f4308;
    background: #fff4df;
    font-size: var(--synchron-readable-text, 16px);
    line-height: 1.4;
}

.user-turn {
    max-width: 82%;
    align-self: flex-end;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-turn .message.user {
    max-width: none;
    align-self: stretch;
}

.user-actions {
    justify-content: flex-end;
}

.message p {
    margin: 0 0 8px;
}

.message p:last-child {
    margin-bottom: 0;
}

.message.user {
    align-self: flex-end;
    color: #202124;
    background: #eceff1;
    border-bottom-right-radius: 5px;
}

.message.agent {
    color: var(--text);
    background: var(--agent-bg);
    padding: 5px 2px;
    border-bottom-left-radius: 5px;
}

.message-actions {
    min-height: 34px;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 2px;
}

.message-actions[hidden] {
    display: none;
}

.message-actions button {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 9px;
    color: #69737c;
    background: transparent;
    cursor: pointer;
    font-size: 15px;
}

.message-actions button:hover,
.message-actions button:active,
.message-actions button.active {
    color: #111;
    background: #eceff1;
}

.chat-input-area {
    padding: 10px 12px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    display: flex;
    align-items: center;
    gap: 8px;
    border-top: 1px solid var(--border);
    background: #fff;
}

#chatInput {
    min-width: 0;
    min-height: 48px;
    flex: 1;
    padding: 11px 16px;
    border: 1px solid #cdd8e1;
    border-radius: 24px;
    outline: none;
    color: var(--text);
    background: #f8fafb;
    font-size: 18px;
}

#chatInput:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(8, 124, 240, 0.11);
}

#sendBtn {
    min-width: 50px;
    min-height: 48px;
    padding: 0 17px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    border-radius: 24px;
    cursor: pointer;
    color: #fff;
    background: #111;
    font-weight: 750;
}

#sendBtn:disabled,
#chatInput:disabled {
    opacity: 0.58;
}

.context-box {
    margin-bottom: 11px;
    padding: 12px;
    border: 1px solid #e6edf2;
    border-radius: 12px;
    background: #f8fafb;
}

.context-label {
    margin-bottom: 5px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 750;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.context-value {
    color: var(--text);
    font-size: 14px;
    font-weight: 650;
    overflow-wrap: anywhere;
}

.activity-title {
    margin: 18px 0 8px;
}

.log-list {
    margin: 0;
    padding: 0;
    list-style: none;
    color: var(--muted);
    font-size: 13px;
}

.log-list li {
    padding: 8px 0;
    border-bottom: 1px solid #edf1f4;
}

.status-green {
    color: var(--success);
}

.status-red {
    color: var(--error);
}

.status-yellow {
    color: #c58a00;
}

.close-btn {
    width: 38px;
    height: 38px;
    display: none;
    border-radius: 50%;
    color: #4e5c69;
    background: #edf2f6;
    font-size: 18px;
}

.message.typing {
    width: fit-content;
    display: flex;
    align-items: center;
    gap: 5px;
}

.typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #83909c;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typing {
    0%,
    80%,
    100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

@media (max-width: 900px) {
    .topbar {
        min-height: 64px;
    }

    .brand-name {
        font-size: 20px;
    }

    .brand-subtitle {
        display: none;
    }

    .status-indicator {
        max-width: 130px;
        padding: 7px 9px;
    }

    .layout {
        display: block;
        padding: 0;
    }

    .projectPanel {
        display: none;
    }

    .chatPanel {
        width: 100%;
        height: calc(100dvh - 64px);
        border: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .statusPanel {
        position: fixed;
        inset: 64px 0 0;
        z-index: 30;
        display: none;
        border: 0;
        border-radius: 0;
    }

    .statusPanel.mobile-visible {
        display: flex;
    }

    .close-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    #chatMessages {
        padding: 14px 12px;
    }

    .message {
        max-width: 92%;
        font-size: 20px;
        line-height: 1.58;
    }

    .assistant-turn {
        width: 100%;
    }

    .assistant-turn .message {
        max-width: 100%;
    }

    #sendBtn {
        width: 50px;
        padding: 0;
    }

    #sendBtn span {
        display: none;
    }
}

@media (max-width: 390px) {
    .tool-btn span {
        display: none;
    }

    .tool-btn {
        width: 38px;
        justify-content: center;
        padding: 0;
    }

    #agentStatusText {
        font-size: 11px;
    }
}


.message.typing {
    max-width: none;
    padding: 8px 2px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    background: transparent;
}

.thinking-avatar {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #111;
    background: #f0f2f3;
    animation: thinking-pulse 1.4s ease-in-out infinite;
}

.thinking-label {
    font-size: 14px;
    font-weight: 650;
}

.thinking-dots {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.thinking-dots span {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #83909c;
    animation: thinking-dot 1.2s infinite ease-in-out both;
}

.thinking-dots span:nth-child(1) { animation-delay: -0.24s; }
.thinking-dots span:nth-child(2) { animation-delay: -0.12s; }

@keyframes thinking-pulse {
    0%, 100% { transform: scale(1); opacity: 0.72; }
    50% { transform: scale(1.08); opacity: 1; }
}

@keyframes thinking-dot {
    0%, 80%, 100% { transform: translateY(0); opacity: 0.35; }
    40% { transform: translateY(-3px); opacity: 1; }
}


.attach-btn {
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 50%;
    color: #30363b;
    background: #f1f2f3;
    cursor: pointer;
    font-size: 18px;
}

.attach-btn:disabled {
    opacity: 0.45;
    cursor: default;
}

.attachment-preview {
    margin: 8px 12px 0;
    padding: 8px;
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr) 36px;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #f8fafb;
}

.attachment-preview[hidden] {
    display: none;
}

.attachment-preview img {
    width: 54px;
    height: 54px;
    object-fit: cover;
    border-radius: 10px;
}

.attachment-preview strong,
.attachment-preview span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.attachment-preview strong {
    font-size: 13px;
}

.attachment-preview span {
    margin-top: 3px;
    color: var(--muted);
    font-size: 11px;
}

#removeAttachmentBtn {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 50%;
    color: #4e5c69;
    background: #edf2f6;
    cursor: pointer;
}

.message-image {
    display: block;
    width: min(280px, 100%);
    max-height: 320px;
    margin-bottom: 8px;
    object-fit: contain;
    border-radius: 12px;
}


.tool-status-actions,
.permission-card-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 9px;
    flex: 0 0 auto;
}

.tool-connect-btn,
.permission-info-btn,
.setup-action {
    min-height: 40px;
    padding: 9px 14px;
    border: 1px solid #cbd5df;
    border-radius: 999px;
    color: #14324a;
    background: #f4f8fb;
    font: inherit;
    font-size: 13px;
    font-weight: 750;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

.tool-connect-btn {
    color: #075985;
    border-color: #bae6fd;
    background: #eaf8ff;
}

.setup-guide {
    display: grid;
    gap: 14px;
}

.setup-step {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
}

.setup-step > span {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #075985;
    background: #e0f2fe;
    font-weight: 800;
}

.setup-step strong,
.setup-step p {
    display: block;
}

.setup-step p {
    margin: 6px 0 12px;
    color: var(--muted);
    line-height: 1.45;
}

.setup-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.setup-note {
    padding: 14px 16px;
    border-radius: 14px;
    color: #78500a;
    background: #fff7df;
    line-height: 1.45;
}

@media (max-width: 520px) {
    .permission-card {
        align-items: flex-start;
    }

    .tool-status-actions,
    .permission-card-actions {
        width: 100%;
        align-items: stretch;
    }

    .tool-connect-btn,
    .permission-info-btn,
    .setup-action {
        width: 100%;
    }
}