/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:        #0f1117;
    --bg2:       #171b26;
    --bg3:       #1e2433;
    --border:    #2a3145;
    --accent:    #3b82f6;
    --accent2:   #1d4ed8;
    --green:     #10b981;
    --yellow:    #f59e0b;
    --red:       #ef4444;
    --text:      #e2e8f0;
    --text2:     #94a3b8;
    --text3:     #64748b;
    --radius:    10px;
    --sidebar-w: 260px;
    --font:      'Inter', sans-serif;
    --font-display: 'Sora', sans-serif;
}

html, body { height: 100%; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    display: flex;
    font-size: 14px;
    line-height: 1.6;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    min-height: 100vh;
    background: var(--bg2);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px 12px;
    flex-shrink: 0;
    overflow-y: auto;
}

.sidebar-header { padding: 0 8px 20px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 24px; width: 30%; }
.logo-icon svg { width: 100%; height: 100%; }
.logo-title { display: block; font-family: var(--font-display); font-weight: 700; font-size: 15px; color: var(--text); }
.logo-sub   { display: block; font-size: 11px; color: var(--text3); }

.btn-novo-chat {
    display: block;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius);
    padding: 9px 14px;
    font-size: 13px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20px;
    transition: background .2s;
}
.btn-novo-chat:hover { background: var(--accent2); }

.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }
.nav-label { font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: .06em; padding: 0 8px 6px; }
.nav-item {
    display: flex;
    flex-direction: column;
    padding: 8px 10px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text2);
    font-size: 13px;
    transition: background .15s;
}
.nav-item:hover   { background: var(--bg3); color: var(--text); }
.nav-item.active  { background: var(--bg3); color: var(--text); border-left: 2px solid var(--accent); }
.nav-empresa { font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-data    { font-size: 11px; color: var(--text3); }
.nav-empty   { font-size: 12px; color: var(--text3); padding: 8px 10px; }

/* ===== MAIN ===== */
.main-content {
    flex: 1;
    min-height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* ===== HERO (INDEX) ===== */
.page-hero {
    padding: 64px 48px 40px;
    max-width: 640px;
}
.page-hero h1 {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.page-hero p { color: var(--text2); font-size: 16px; margin-bottom: 28px; max-width: 500px; }

/* ===== CARDS GRID ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    padding: 0 48px 48px;
}

.card-chat {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.card-header-row { display: flex; justify-content: space-between; align-items: center; }
.badge-empresa {
    background: rgba(59,130,246,.15);
    color: var(--accent);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 100px;
}
.card-data  { font-size: 11px; color: var(--text3); }
.card-titulo { font-weight: 600; font-size: 14px; }
.card-msgs   { font-size: 12px; color: var(--text3); }
.card-actions { display: flex; gap: 8px; align-items: center; margin-top: 4px; }
.status-pill {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 999px;
}
.status-ativo { background: rgba(16,185,129,.15); color: var(--green); }
.status-processando { background: rgba(245,158,11,.15); color: var(--yellow); }
.status-erro { background: rgba(239,68,68,.15); color: var(--red); }

/* ===== EMPTY STATE ===== */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 64px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.empty-icon { font-size: 48px; }
.empty-state h2 { font-family: var(--font-display); font-size: 22px; }
.empty-state p  { color: var(--text2); max-width: 400px; }

/* ===== FORM PAGE ===== */
.form-page  { max-width: 760px; margin: 0 auto; padding: 40px 32px; width: 100%; }
.form-header { margin-bottom: 32px; }
.form-header h1 { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin: 12px 0 6px; }
.form-header p  { color: var(--text2); }
.upload-note { font-size: 13px; color: var(--yellow); margin-top: 10px; }

.tac-form   { display: flex; flex-direction: column; gap: 24px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-weight: 600; font-size: 13px; }
.optional { font-weight: 400; color: var(--text3); }
.form-input {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    padding: 10px 14px;
    outline: none;
    transition: border .2s;
}
.form-input:focus { border-color: var(--accent); }

.form-textarea {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    padding: 12px 14px;
    outline: none;
    resize: vertical;
    width: 100%;
    transition: border .2s;
    line-height: 1.6;
}
.form-textarea:focus { border-color: var(--accent); }
.form-error { font-size: 12px; color: var(--red); }
.is-error   { border-color: var(--red) !important; }

.tab-toggle { display: flex; gap: 4px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; padding: 3px; width: fit-content; }
.tab-btn {
    background: transparent;
    border: none;
    color: var(--text2);
    cursor: pointer;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 6px;
    transition: all .15s;
}
.tab-btn.active { background: var(--bg3); color: var(--text); }

.tab-content.hidden { display: none; }
.tab-content { margin-top: 8px; }

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 20px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    position: relative;
}
.upload-zone:hover, .upload-zone.dragging { border-color: var(--accent); background: rgba(59,130,246,.05); }
.upload-zone.has-file { border-color: var(--green); background: rgba(16,185,129,.05); }
.upload-input { position: absolute; width: 0; height: 0; opacity: 0; }
.upload-icon  { font-size: 40px; }
.upload-text  { color: var(--text2); margin: 8px 0 4px; }
.upload-hint  { font-size: 12px; color: var(--text3); }
.upload-filename { font-size: 13px; color: var(--green); margin-top: 8px; }

.form-footer { padding-top: 8px; }

/* ===== BUTTONS ===== */
.btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 18px;
    text-decoration: none;
    transition: background .2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-primary:hover { background: var(--accent2); }
.btn-primary.btn-lg { font-size: 15px; padding: 12px 28px; }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text2);
    cursor: pointer;
    font-family: var(--font);
    font-size: 13px;
    padding: 8px 16px;
    transition: all .2s;
    text-decoration: none;
}
.btn-ghost:hover { border-color: var(--text2); color: var(--text); }
.btn-back { display: inline-flex; align-items: center; gap: 4px; color: var(--text2); text-decoration: none; font-size: 13px; margin-bottom: 16px; }
.btn-back:hover { color: var(--text); }

.btn-submit .btn-loading.hidden, .btn-submit .btn-label.hidden { display: none; }

/* ===== CHAT PAGE ===== */
.chat-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg2);
    flex-shrink: 0;
}
.chat-info h2 { font-family: var(--font-display); font-size: 17px; font-weight: 700; }
.chat-sub     { font-size: 12px; color: var(--text3); }

.tac-panel {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    max-height: 280px;
    overflow-y: auto;
    flex-shrink: 0;
}
.tac-panel.hidden { display: none; }
.chat-status-banner {
    padding: 12px 24px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}
.chat-status-processing {
    background: rgba(245,158,11,.08);
    color: #fbbf24;
}
.chat-status-error {
    background: rgba(239,68,68,.08);
    color: #fca5a5;
}
.tac-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    font-weight: 600;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg2);
}
.btn-close { background: none; border: none; color: var(--text2); cursor: pointer; font-size: 16px; }
.tac-texto { padding: 16px 20px; font-size: 12px; color: var(--text2); white-space: pre-wrap; line-height: 1.7; }

/* ===== MENSAGENS ===== */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

.msg { display: flex; gap: 12px; max-width: 900px; }
.msg-assistant { align-self: flex-start; width: 100%; }
.msg-user      { align-self: flex-end; flex-direction: row-reverse; max-width: 640px; }

.msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    background: var(--bg3);
    border: 1px solid var(--border);
}

.msg-bubble { display: flex; flex-direction: column; gap: 4px; min-width: 0; }

.msg-user .msg-bubble .msg-content {
    background: var(--accent);
    color: #fff;
    border-radius: 16px 4px 16px 16px;
    padding: 10px 14px;
    font-size: 14px;
    white-space: pre-wrap;
}
.msg-assistant .msg-bubble .msg-content {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 4px 16px 16px 16px;
    padding: 14px 18px;
    font-size: 14px;
    line-height: 1.7;
}

.msg-time { font-size: 11px; color: var(--text3); padding: 0 4px; }
.msg-user .msg-time { text-align: right; }

/* Markdown dentro das mensagens */
.markdown h1, .markdown h2, .markdown h3 {
    font-family: var(--font-display);
    margin: 14px 0 6px;
    color: var(--text);
}
.markdown h1 { font-size: 18px; }
.markdown h2 { font-size: 16px; }
.markdown h3 { font-size: 14px; }
.markdown strong { color: var(--text); font-weight: 600; }
.markdown em { color: var(--text2); }
.markdown ul  { padding-left: 18px; margin: 8px 0; }
.markdown li  { margin-bottom: 4px; }
.markdown code {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 12px;
    font-family: 'Courier New', monospace;
}
.markdown p { margin-bottom: 8px; }

/* Typing indicator */
.typing-indicator { display: flex; gap: 4px; align-items: center; padding: 6px 0; }
.typing-indicator span {
    width: 7px; height: 7px;
    background: var(--text3);
    border-radius: 50%;
    animation: blink 1.2s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: .2s; }
.typing-indicator span:nth-child(3) { animation-delay: .4s; }
@keyframes blink {
    0%, 80%, 100% { opacity: .3; transform: scale(.8); }
    40%           { opacity: 1;  transform: scale(1); }
}

/* ===== INPUT AREA ===== */
.chat-input-area {
    padding: 16px 24px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg);
    flex-shrink: 0;
}

.suggestions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.suggestions.hidden { display: none; }
.suggestion-chip {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text2);
    cursor: pointer;
    font-family: var(--font);
    font-size: 12px;
    padding: 5px 12px;
    transition: all .15s;
    white-space: nowrap;
}
.suggestion-chip:hover { border-color: var(--accent); color: var(--accent); }

.chat-input-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 10px 10px 14px;
    transition: border .2s;
}
.chat-input-row:focus-within { border-color: var(--accent); }

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    outline: none;
    resize: none;
    max-height: 160px;
    overflow-y: auto;
}
.chat-input::placeholder { color: var(--text3); }

.btn-enviar {
    background: var(--accent);
    border: none;
    border-radius: 7px;
    color: #fff;
    cursor: pointer;
    padding: 8px;
    line-height: 0;
    transition: background .2s;
    flex-shrink: 0;
}
.btn-enviar:hover    { background: var(--accent2); }
.btn-enviar:disabled { opacity: .5; cursor: not-allowed; }

/* ===== MISC ===== */
.hidden { display: none !important; }
.alert  { padding: 12px 20px; font-size: 13px; border-left: 3px solid transparent; }
.alert-success { background: rgba(16,185,129,.1); border-left-color: var(--green); color: var(--green); }
.alert-warning { background: rgba(245,158,11,.1); border-left-color: var(--yellow); color: #fbbf24; }
.alert-error { background: rgba(239,68,68,.1); border-left-color: var(--red); color: #fca5a5; }