/* ================================================
   app/static/css/style.css
   "Correspondent" letterhead theme — ink-navy ground, brass accent,
   glassmorphism panels. Carried over from the original Streamlit theme.
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    --ink: #0D1420;
    --panel: #141D30;
    --panel-soft: #1A2440;
    --border: #263252;
    --brass: #D9A24B;
    --brass-soft: #E8C084;
    --teal: #4FB7A8;
    --text: #E9ECF5;
    --text-muted: #8B94B3;
    --danger: #E06C6C;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--ink);
    color: var(--text);
    font-family: 'Inter', sans-serif;
}

.app-shell {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 18px 40px;
}

/* ---- Letterhead header ---- */
.letterhead {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 22px 26px;
    background: linear-gradient(135deg, var(--panel) 0%, var(--panel-soft) 100%);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 18px;
}
.letterhead-seal {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, var(--brass-soft), var(--brass) 70%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 2px 10px rgba(217, 162, 75, 0.35);
}
.letterhead-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}
.letterhead-subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    margin-top: 4px;
}

.perforation {
    height: 1px;
    margin: 18px 0;
    background-image: repeating-linear-gradient(to right, var(--border) 0, var(--border) 6px, transparent 6px, transparent 12px);
}

.mono-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12.5px;
    color: var(--text-muted);
}

/* ---- Panels / cards ---- */
.panel {
    background: rgba(20, 29, 48, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 20px;
    margin-bottom: 14px;
}

.alert {
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 12px 14px;
    font-size: 14px;
    margin-bottom: 12px;
}
.alert-info { border-color: var(--teal); color: var(--text); background: rgba(79, 183, 168, 0.08); }
.alert-success { border-color: var(--teal); color: var(--text); background: rgba(79, 183, 168, 0.12); }
.alert-warning { border-color: var(--brass); color: var(--text); background: rgba(217, 162, 75, 0.1); }
.alert-error { border-color: var(--danger); color: var(--text); background: rgba(224, 108, 108, 0.1); }

/* ---- Buttons ---- */
button {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    border-radius: 10px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    background: var(--panel-soft);
    color: var(--text);
    transition: all 0.15s ease;
}
button:hover:not(:disabled) { border-color: var(--brass); color: var(--brass-soft); background: var(--panel); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.primary { background: var(--brass); color: #1A1204; border: none; font-weight: 600; }
button.primary:hover:not(:disabled) { background: var(--brass-soft); color: #1A1204; }
button.full { width: 100%; }
.btn-row { display: flex; gap: 10px; }
.btn-row > button { flex: 1; }

/* ---- File upload ---- */
.upload-box {
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}
.upload-box input[type="file"] { display: block; margin: 10px auto 0; color: var(--text-muted); font-size: 13px; }

/* ---- Chat ---- */
.chat-window {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 120px;
}
.msg {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    background: var(--panel);
    border-left: 3px solid var(--teal);
    max-width: 100%;
    white-space: pre-wrap;
    line-height: 1.5;
    font-size: 14.5px;
}
.msg.user { border-left-color: var(--brass); background: var(--panel-soft); }
.msg .role { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--text-muted); margin-bottom: 4px; }

.chat-input-row {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}
.chat-input-row textarea {
    flex: 1;
    resize: none;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 14.5px;
    padding: 10px 12px;
    min-height: 44px;
    max-height: 140px;
}
.chat-input-row textarea:focus { outline: none; border-color: var(--brass); }

/* ---- Envelope (pending send) card ---- */
.envelope-card {
    border: 1px dashed var(--brass);
    border-radius: 10px;
    padding: 14px 16px;
    background: var(--panel-soft);
    margin-bottom: 10px;
}
.envelope-card textarea {
    width: 100%;
    margin-top: 8px;
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    padding: 10px;
    min-height: 140px;
    resize: vertical;
}

/* ---- Ledger ---- */
details.ledger { border: 1px solid var(--border); border-radius: 10px; background: var(--panel); padding: 6px 14px; }
details.ledger summary { cursor: pointer; padding: 8px 0; font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--text-muted); }
.ledger-entry { margin-bottom: 10px; }

/* ---- Misc ---- */
.spinner {
    display: inline-block;
    width: 14px; height: 14px;
    border: 2px solid var(--text-muted);
    border-top-color: var(--brass);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    vertical-align: -2px;
    margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }