/* ============================================================
   LiveDesk — shared design tokens & components
   Warm-neutral, low-saturation, premium SaaS support chat.
   Accent color is injected per-page via the CSS variable
   --accent (set inline from config/settings by PHP).
   ============================================================ */

:root {
    --accent: #1F6F54;
    --accent-soft: color-mix(in srgb, var(--accent) 10%, #ffffff);
    --accent-ink: #ffffff;

    --bg: #faf8f5;          /* warm paper */
    --bg-sunken: #f3f0eb;   /* sunken panels */
    --surface: #ffffff;
    --border: #e7e2da;
    --border-strong: #d8d2c7;

    --ink: #2b2620;         /* warm near-black */
    --ink-soft: #6f675c;
    --ink-faint: #a39a8d;

    --danger: #b3402e;
    --online: #2f9e6e;

    --bubble-other: #efece6;
    --shadow-sm: 0 1px 2px rgba(43, 38, 32, .06), 0 1px 6px rgba(43, 38, 32, .04);
    --shadow-md: 0 4px 14px rgba(43, 38, 32, .08), 0 1px 4px rgba(43, 38, 32, .05);
    --shadow-lg: 0 18px 50px rgba(43, 38, 32, .14);

    --radius-bubble: 18px;
    --radius-card: 14px;

    --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

/* The `hidden` attribute must always win over component display rules. */
[hidden] { display: none !important; }

html, body {
    height: 100%;
    margin: 0;
    /* Mobile: never let the PAGE scroll/rubber-band — panels scroll internally. */
    overflow: hidden;
    overscroll-behavior: none;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    -webkit-tap-highlight-color: transparent;
}

button, input, textarea { font-family: inherit; }

/* Remove double-tap-zoom delay on interactive elements (mobile). */
button, .btn, .send-btn, a { touch-action: manipulation; }

/* ---------- shared atoms ---------- */

.btn {
    appearance: none;
    border: 1px solid transparent;
    background: var(--accent);
    color: var(--accent-ink);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .01em;
    padding: 11px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
    box-shadow: var(--shadow-sm);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: default; transform: none; box-shadow: var(--shadow-sm); }

.btn--ghost {
    background: transparent;
    color: var(--ink-soft);
    border-color: var(--border-strong);
    box-shadow: none;
}
.btn--ghost:hover { background: var(--bg-sunken); color: var(--ink); }

.btn--danger { background: var(--danger); }

.field {
    width: 100%;
    padding: 12px 14px;
    /* >=16px: stops iOS Safari auto-zooming the page on focus */
    font-size: 16px;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    outline: none;
    transition: border-color .12s ease, box-shadow .12s ease;
}
.field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.field::placeholder { color: var(--ink-faint); }

/* presence dot */
.presence {
    position: relative;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--online);
    flex: none;
}
.presence::after {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--online);
    opacity: .55;
    animation: presence-pulse 2.2s ease-out infinite;
}
.presence--off { background: var(--ink-faint); }
.presence--off::after { display: none; }
@keyframes presence-pulse {
    0%   { transform: scale(.55); opacity: .55; }
    70%  { transform: scale(1.25); opacity: 0; }
    100% { transform: scale(1.25); opacity: 0; }
}

/* ============================================================
   Customer chat — full-screen (index.php)
   ============================================================ */

.chat-shell {
    height: 100vh;          /* fallback for old browsers */
    height: 100dvh;         /* dynamic viewport: shrinks with URL bar (iOS/Android) */
    display: flex;
    flex-direction: column;
    background: var(--bg);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 13px;
    padding: 14px 22px;
    /* iPhone notch / status bar */
    padding-top: calc(14px + env(safe-area-inset-top, 0px));
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex: none;
}
.chat-header__logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
    flex: none;
}
.chat-header__name { font-size: 15.5px; font-weight: 650; letter-spacing: -.01em; }
.chat-header__status {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 12.5px;
    color: var(--ink-soft);
    margin-top: 2px;
}
.chat-header__spacer { flex: 1; }

/* messages column */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 26px 22px 18px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;  /* momentum scroll on iOS */
    overscroll-behavior: contain;       /* don't chain scroll to the page */
}
.chat-messages__inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* date divider */
.date-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 14px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink-faint);
}
.date-divider::before, .date-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* message rows */
.msg {
    display: flex;
    margin-top: 10px;
    animation: msg-in .15s ease-out both;
}
.msg--compact { margin-top: 3px; }
@keyframes msg-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}
.msg__bubble {
    max-width: min(72%, 560px);
    padding: 11px 15px;
    border-radius: var(--radius-bubble);
    font-size: 14.5px;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    box-shadow: var(--shadow-sm);
}
.msg--customer { justify-content: flex-end; }
.msg--customer .msg__bubble {
    background: var(--accent);
    color: var(--accent-ink);
    border-bottom-right-radius: 6px;
}
.msg--admin .msg__bubble {
    background: var(--bubble-other);
    color: var(--ink);
    border-bottom-left-radius: 6px;
}
.msg--system { justify-content: center; }
.msg--system .msg__bubble {
    background: transparent;
    box-shadow: none;
    color: var(--ink-faint);
    font-size: 12px;
    padding: 4px 10px;
}
.msg__time {
    display: block;
    font-size: 10.5px;
    margin-top: 5px;
    opacity: .72;
}
.msg--customer .msg__time { text-align: right; }

/* peer typing indicator (three bouncing dots) */
.typing-dots { display: inline-flex; gap: 4px; align-items: center; padding: 4px 2px; }
.typing-dots span {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--ink-faint);
    animation: dot-bounce 1.2s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: .15s; }
.typing-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes dot-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: .45; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* composer */
.chat-composer {
    flex: none;
    padding: 14px 22px 18px;
    /* iPhone home-indicator bar */
    padding-bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    background: var(--surface);
    border-top: 1px solid var(--border);
}
.chat-composer__inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
    gap: 10px;
}
.chat-composer textarea {
    flex: 1;
    resize: none;
    max-height: 140px;
    min-height: 46px;
    padding: 12px 15px;
    /* >=16px: stops iOS Safari auto-zooming the page on focus */
    font-size: 16px;
    line-height: 1.45;
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    background: var(--bg);
    outline: none;
    touch-action: manipulation;
    transition: border-color .12s ease, box-shadow .12s ease, background .12s ease;
}
.chat-composer textarea:focus {
    background: var(--surface);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.chat-composer .send-btn {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    border: none;
    background: var(--accent);
    color: var(--accent-ink);
    display: grid;
    place-items: center;
    cursor: pointer;
    flex: none;
    transition: transform .12s ease, box-shadow .12s ease, opacity .12s ease;
    box-shadow: var(--shadow-sm);
}
.chat-composer .send-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.chat-composer .send-btn:disabled { opacity: .45; transform: none; cursor: default; }
.chat-composer .send-btn svg { width: 19px; height: 19px; }

/* connection-loss indicator */
.conn-banner {
    flex: none;
    text-align: center;
    font-size: 12.5px;
    font-weight: 600;
    color: #8a5a17;
    background: #fdf3e2;
    border-bottom: 1px solid #f1e2c4;
    padding: 7px 12px;
    display: none;
}
.conn-banner.is-visible { display: block; }

/* pre-chat form */
.prechat {
    height: 100dvh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        radial-gradient(900px 500px at 85% -10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 60%),
        var(--bg);
}
.prechat__card {
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
    padding: 34px 30px 30px;
    animation: msg-in .25s ease-out both;
}
.prechat__logo {
    width: 56px; height: 56px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-md);
    margin-bottom: 18px;
}
.prechat__title { margin: 0 0 6px; font-size: 21px; font-weight: 700; letter-spacing: -.02em; }
.prechat__sub { margin: 0 0 22px; font-size: 13.5px; color: var(--ink-soft); line-height: 1.55; }
.prechat__card label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--ink-soft);
    margin: 14px 0 6px;
}
.prechat__card .btn { width: 100%; margin-top: 22px; }
.prechat__error, .form-error {
    display: none;
    margin-top: 14px;
    font-size: 12.5px;
    color: var(--danger);
}
.prechat__error.is-visible, .form-error.is-visible { display: block; }

/* ============================================================
   Admin panel (admin.php)
   ============================================================ */

.admin-shell { height: 100dvh; display: flex; flex-direction: column; }

.admin-topbar {
    flex: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.admin-topbar__logo { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.admin-topbar__brand { font-size: 14.5px; font-weight: 700; letter-spacing: -.01em; }
.admin-topbar__tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: 999px;
    padding: 3px 9px;
}
.admin-topbar__spacer { flex: 1; }

.admin-main { flex: 1; display: flex; min-height: 0; }

/* left: conversation list */
.conv-list {
    width: 320px;
    flex: none;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-right: 1px solid var(--border);
    min-height: 0;
}
.conv-list__head {
    padding: 16px 18px 10px;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--ink-faint);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.conv-list__items { flex: 1; overflow-y: auto; padding: 4px 10px 12px; }
.conv-list__empty {
    padding: 34px 20px;
    text-align: center;
    color: var(--ink-faint);
    font-size: 13px;
    line-height: 1.6;
}

.conv-item {
    display: flex;
    gap: 11px;
    width: 100%;
    text-align: left;
    padding: 11px 12px;
    border: none;
    background: transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: background .12s ease;
    position: relative;
}
.conv-item:hover { background: var(--bg-sunken); }
.conv-item.is-active { background: var(--accent-soft); }
.conv-item__avatar {
    width: 38px; height: 38px;
    border-radius: 50%;
    flex: none;
    display: grid;
    place-items: center;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    background: var(--accent);
}
.conv-item__avatar--closed { background: var(--ink-faint); }
.conv-item__main { flex: 1; min-width: 0; }
.conv-item__row { display: flex; align-items: baseline; gap: 8px; }
.conv-item__name {
    font-size: 13.5px;
    font-weight: 650;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}
.conv-item__time { font-size: 10.5px; color: var(--ink-faint); flex: none; }
.conv-item__excerpt {
    font-size: 12.5px;
    color: var(--ink-soft);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}
.conv-item__excerpt--typing {
    color: var(--accent);
    font-style: italic;
    animation: typing-glow 1.4s ease-in-out infinite;
}
@keyframes typing-glow {
    0%, 100% { opacity: .65; }
    50% { opacity: 1; }
}
.conv-item__badge {
    position: absolute;
    top: 8px;
    right: 10px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 10.5px;
    font-weight: 700;
    display: grid;
    place-items: center;
}
.conv-item__closed-tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--ink-faint);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    padding: 1px 7px;
    flex: none;
}

/* right: active conversation */
.conv-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: var(--bg);
}
.conv-pane__active {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}
.conv-pane__empty {
    flex: 1;
    display: grid;
    place-items: center;
    color: var(--ink-faint);
    font-size: 14px;
    text-align: center;
    line-height: 1.7;
}
.conv-pane__head {
    flex: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.conv-pane__name { font-size: 14.5px; font-weight: 700; letter-spacing: -.01em; }
.conv-pane__email { font-size: 12px; color: var(--ink-soft); margin-top: 1px; }
.conv-pane__spacer { flex: 1; }

/* live draft preview — the killer feature */
.draft-preview {
    flex: none;
    display: none;
    align-items: flex-start;
    gap: 9px;
    margin: 0 auto;
    max-width: 760px;
    width: calc(100% - 44px);
    padding: 9px 14px;
    border: 1px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
    background: var(--accent-soft);
    border-radius: 12px 12px 0 0;
    border-bottom: none;
    font-size: 13px;
    color: var(--ink-soft);
}
.draft-preview.is-visible { display: flex; }
.draft-preview__label {
    flex: none;
    font-style: italic;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
}
.draft-preview__text {
    font-style: italic;
    min-width: 0;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* admin login */
.admin-login {
    height: 100dvh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        radial-gradient(900px 500px at 15% -10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 60%),
        var(--bg);
}
.admin-login__card {
    width: 100%;
    max-width: 360px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
    padding: 34px 30px 30px;
    text-align: center;
    animation: msg-in .25s ease-out both;
}
.admin-login__card .field { text-align: center; }
.admin-login__card .btn { width: 100%; margin-top: 16px; }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 8px;
    border: 3px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); background-clip: content-box; border: 3px solid transparent; }

/* responsive */
@media (max-width: 820px) {
    .conv-list { width: 100%; }
    .admin-main { flex-direction: column; }
    .conv-list { border-right: none; border-bottom: 1px solid var(--border); max-height: 42%; }
    .msg__bubble { max-width: 86%; }
}

/* ============================================================
   Phones — iOS & Android customer chat tuning
   ============================================================ */
@media (max-width: 640px) {
    .chat-header {
        padding: 12px 16px;
        padding-top: calc(12px + env(safe-area-inset-top, 0px));
    }
    .chat-header__logo { width: 36px; height: 36px; }
    .chat-header__name { font-size: 14.5px; }
    .chat-messages { padding: 18px 14px 12px; }
    .msg__bubble { max-width: 85%; font-size: 15px; }
    .chat-composer {
        padding: 10px 12px 14px;
        padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    }
    .prechat__card { margin: 0 14px; padding: 26px 22px; }
}