/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif; background: #111b21; }

/* ===== App Shell ===== */
.wa-app { height: 100vh; display: flex; flex-direction: column; }
.wa-container { display: flex; flex-direction: column; height: 100vh; max-width: 900px; margin: 0 auto; width: 100%; }

/* ===== Header ===== */
.wa-header {
    background: #202c33;
    color: white;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,.4);
    z-index: 10;
}
.wa-header-left { display: flex; align-items: center; gap: 12px; }
.wa-logo { flex-shrink: 0; }
.wa-title { display: block; font-size: 1.05rem; font-weight: 600; color: #e9edef; }
.wa-subtitle { display: block; font-size: 0.75rem; color: #8696a0; }
.wa-header-right { display: flex; align-items: center; gap: 10px; }
.wa-btn-icon {
    background: none; border: none; cursor: pointer; padding: 8px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: background .2s;
}
.wa-btn-icon:hover { background: rgba(255,255,255,.12); }

.wa-search {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #111b21;
    border: 1px solid #2a3942;
    border-radius: 8px;
    padding: 4px 6px;
}

.wa-search-input {
    width: 180px;
    background: transparent;
    color: #e9edef;
    border: none;
    outline: none;
    font-size: 0.84rem;
}

.wa-search-input::placeholder {
    color: #8696a0;
}

.wa-search-count {
    min-width: 32px;
    text-align: center;
    font-size: 0.75rem;
    color: #8696a0;
}

.wa-search-case {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: #8696a0;
    font-size: 0.74rem;
    user-select: none;
}

.wa-search-case input {
    accent-color: #25D366;
}

.wa-search-btn {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 6px;
    background: #1f2c33;
    color: #e9edef;
    cursor: pointer;
    font-size: 0.8rem;
    line-height: 1;
}

.wa-search-btn:hover:enabled {
    background: #2a3942;
}

.wa-search-btn:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

/* ===== Participants bar ===== */
.wa-participants-bar {
    background: #1d2b32;
    padding: 6px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex-shrink: 0;
    border-bottom: 1px solid #2a3942;
}
.wa-participant-badge {
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}
.wa-participant-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

/* ===== Upload Screen ===== */
.wa-upload-screen {
    flex: 1;
    overflow-y: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 24px 16px;
    background: #0b141a;
}
.wa-upload-card {
    background: #202c33;
    border-radius: 12px;
    padding: 32px 28px;
    max-width: 520px;
    width: 100%;
    text-align: center;
    color: #e9edef;
    box-shadow: 0 4px 24px rgba(0,0,0,.5);
}
.wa-upload-icon { margin-bottom: 16px; }
.wa-upload-card h2 { font-size: 1.4rem; margin-bottom: 10px; color: #e9edef; }
.wa-upload-desc { color: #8696a0; font-size: 0.9rem; line-height: 1.6; margin-bottom: 24px; }

.wa-dropzone {
    border: 2px dashed #2a3942;
    border-radius: 10px;
    padding: 28px 20px;
    cursor: pointer;
    transition: border-color .2s, background .2s;
    margin-bottom: 24px;
    position: relative;
}
.wa-dropzone:hover, .wa-dropzone.dragging {
    border-color: #25D366;
    background: rgba(37,211,102,.06);
}
.wa-dropzone p { color: #8696a0; margin: 8px 0; font-size: 0.9rem; }
.wa-or { font-size: 0.8rem; }

/* InputFile covers the entire drop zone for click & drag-and-drop */
.wa-file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.wa-instructions {
    text-align: left;
    background: #1a2530;
    border-radius: 8px;
    padding: 16px 18px;
    font-size: 0.85rem;
    color: #8696a0;
}
.wa-instructions h4 { color: #e9edef; margin-bottom: 8px; font-size: 0.9rem; }
.wa-instructions ol { padding-left: 18px; line-height: 1.9; }
.wa-instructions code { background: #2a3942; padding: 1px 5px; border-radius: 4px; color: #25D366; }

/* ===== Chat Area ===== */
.wa-chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 8px 10px 16px;
    background: #0b141a;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath d='M0 38.59l2.83-2.83 1.415 1.413L1.413 40H0v-1.41zM0 1.412l2.83 2.83-1.415 1.413L0 4.24V1.412zm20 20L22.83 24.24 21.413 25.65 20 24.24l-1.413 1.41-1.413-1.41L20 21.41zM5.63 5.63l2.83 2.83-1.415 1.413L4.215 7.04 2.8 8.457 1.385 7.04 4.215 4.215 5.63 5.63zm28.285 28.284l2.83-2.83 1.414 1.413-2.83 2.83-1.414-1.413zm-1.415-26.87l2.83 2.83-1.414 1.414-2.83-2.83 1.414-1.414z' fill='%23ffffff' fill-opacity='0.02'/%3E%3C/svg%3E");
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* ===== Date divider ===== */
.wa-date-divider {
    display: flex;
    justify-content: center;
    margin: 12px 0;
}
.wa-date-divider span {
    background: #182229;
    color: #8696a0;
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,.3);
}

/* ===== System message ===== */
.wa-system-msg {
    text-align: center;
    font-size: 0.75rem;
    color: #8696a0;
    background: #182229;
    border-radius: 8px;
    padding: 5px 12px;
    margin: 4px auto;
    max-width: 80%;
}

/* ===== Message rows & bubbles ===== */
.wa-msg-row {
    display: flex;
    margin: 1px 0;
}
.wa-msg-row.sent { justify-content: flex-end; }
.wa-msg-row.received { justify-content: flex-start; }

.wa-bubble {
    max-width: min(68%, 480px);
    min-width: 80px;
    border-radius: 8px;
    padding: 6px 8px 4px;
    position: relative;
    word-break: break-word;
    box-shadow: 0 1px 2px rgba(0,0,0,.3);
}

.wa-bubble.bubble-media {
    max-width: min(75%, 520px);
    min-width: 160px;
    padding: 4px;
}
.bubble-sent {
    background: #005c4b;
    border-bottom-right-radius: 2px;
}
.bubble-received {
    background: #202c33;
    border-bottom-left-radius: 2px;
}

/* Tail */
.bubble-sent::after {
    content: '';
    position: absolute;
    right: -8px;
    bottom: 0;
    width: 0; height: 0;
    border-style: solid;
    border-width: 8px 0 0 8px;
    border-color: transparent transparent transparent #005c4b;
}
.bubble-received::after {
    content: '';
    position: absolute;
    left: -8px;
    bottom: 0;
    width: 0; height: 0;
    border-style: solid;
    border-width: 8px 8px 0 0;
    border-color: transparent #202c33 transparent transparent;
}

.wa-sender-name {
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 3px;
}

.wa-msg-text {
    font-size: 0.9rem;
    color: #e9edef;
    line-height: 1.5;
}
.wa-msg-text a { color: #53bdeb; }

.wa-highlight {
    background: rgba(37, 211, 102, 0.3);
    color: #e9edef;
    border-radius: 3px;
    padding: 0 2px;
}

.wa-highlight-active {
    background: #25D366;
    color: #0b141a;
}

.wa-msg-meta {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    margin-top: 3px;
}

.wa-msg-meta.wa-msg-meta-overlay {
    position: absolute;
    right: 10px;
    bottom: 8px;
    margin-top: 0;
    padding: 2px 6px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.45);
}

.wa-msg-meta.wa-msg-meta-overlay .wa-time,
.wa-msg-meta.wa-msg-meta-overlay .wa-ticks {
    color: #e9edef;
}
.wa-time { font-size: 0.7rem; color: #8696a0; }
.wa-ticks { font-size: 0.7rem; color: #53bdeb; }

/* ===== Media ===== */
.wa-media-img,
.wa-media-video {
    position: relative;
}

.wa-media-img img {
    max-width: 100%;
    max-height: 420px;
    min-width: 220px;
    object-fit: cover;
    border-radius: 6px;
    cursor: zoom-in;
    display: block;
}
.wa-media-video video {
    max-width: 100%;
    max-height: 420px;
    min-width: 220px;
    border-radius: 6px;
    display: block;
}
.wa-media-audio audio { width: 100%; min-width: 220px; }
.wa-media-doc a { color: #53bdeb; text-decoration: none; font-size: 0.88rem; }
.wa-media-doc a:hover { text-decoration: underline; }
.wa-media-omitted { font-size: 0.82rem; color: #8696a0; font-style: italic; }

@media (max-width: 600px) {
    .wa-bubble.bubble-media {
        max-width: min(88%, 420px);
    }

    .wa-media-img img,
    .wa-media-video video {
        min-width: 180px;
        max-height: 320px;
    }
}

/* ===== Lightbox ===== */
.wa-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    cursor: zoom-out;
}
.wa-lightbox img {
    max-width: 95vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 4px;
    cursor: default;
}
.wa-lightbox-close {
    position: absolute;
    top: 12px; right: 16px;
    background: none; border: none;
    color: white; font-size: 1.5rem;
    cursor: pointer; opacity: .8;
}
.wa-lightbox-close:hover { opacity: 1; }

/* ===== Loading overlay ===== */
.wa-loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(11,20,26,.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 500;
    color: #e9edef;
    gap: 16px;
}
.wa-spinner {
    width: 44px; height: 44px;
    border: 4px solid #2a3942;
    border-top-color: #25D366;
    border-radius: 50%;
    animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Error toast ===== */
.wa-error-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #cc2b2b;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.88rem;
    cursor: pointer;
    z-index: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,.4);
    max-width: 90vw;
    text-align: center;
}

@keyframes waRowJumpPulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
    100% { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
}

.wa-msg-row.wa-msg-row-jump .wa-bubble {
    animation: waRowJumpPulse .8s ease-out;
}

/* ===== Blazor loading ===== */
#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0,0,0,.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: .75rem; top: .5rem; }

.loading-progress {
    position: relative; display: block;
    width: 8rem; height: 8rem;
    margin: 20vh auto 1rem;
}
.loading-progress circle {
    fill: none; stroke: #2a3942; stroke-width: .6rem;
    transform-origin: 50% 50%; transform: rotate(-90deg);
}
.loading-progress circle:last-child {
    stroke: #25D366;
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * .8), 500%;
    transition: stroke-dasharray .05s ease-in-out;
}
.loading-progress-text {
    position: absolute; text-align: center; font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto .2rem; color: #e9edef;
}
.loading-progress-text:after { content: var(--blazor-load-percentage-text, "Loading"); }

/* ===== Scrollbar styling ===== */
.wa-chat-area::-webkit-scrollbar { width: 5px; }
.wa-chat-area::-webkit-scrollbar-track { background: transparent; }
.wa-chat-area::-webkit-scrollbar-thumb { background: #2a3942; border-radius: 3px; }

@media (max-width: 760px) {
    .wa-header {
        align-items: flex-start;
        gap: 8px;
    }

    .wa-header-right {
        width: 100%;
        justify-content: flex-end;
        flex-wrap: wrap;
    }

    .wa-search {
        width: 100%;
    }

    .wa-search-input {
        width: 100%;
        min-width: 0;
    }
}