/* ============================================================
   Course Support Agent v1.1.0
   Brand: #102C59 | #DAC0A3 | #991110
   RTL + Persian-friendly · Eye-friendly contrast · Soft gradients
   ============================================================ */

.csa-agent {
    --csa-primary: #102C59;
    --csa-primary-light: #0a6a8f;
    --csa-primary-dark: #063a50;
    --csa-accent: #DAC0A3;
    --csa-accent-soft: rgba(199, 253, 10, 0.15);
    --csa-accent-mid: rgba(199, 253, 10, 0.35);
    --csa-dark: #0b1a33;
    --csa-dark-2: #1f1f1f;
    --csa-dark-3: #333333;
    --csa-surface: #2e2e2e;
    --csa-surface-elevated: #383838;
    --csa-text: #f0f0f0;
    --csa-text-muted: #b0b0b0;
    --csa-text-dim: #888888;
    --csa-border: rgba(255, 255, 255, 0.08);
    --csa-border-strong: rgba(8, 79, 107, 0.45);
    --csa-radius: 18px;
    --csa-radius-sm: 12px;
    --csa-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(8, 79, 107, 0.2);
    --csa-glow: 0 0 24px rgba(199, 253, 10, 0.12);

    font-family: 'Vazirmatn', 'IRANSans', Tahoma, 'Segoe UI', sans-serif;
    direction: rtl;
    text-align: right;
    max-width: 420px;
    width: 100%;
    margin: 20px auto;
    background: linear-gradient(165deg, var(--csa-dark) 0%, var(--csa-dark-2) 55%, #1a2a32 100%);
    border-radius: var(--csa-radius);
    box-shadow: var(--csa-shadow);
    overflow: hidden;
    border: 1px solid var(--csa-border-strong);
    position: relative;
    color: var(--csa-text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

.csa-agent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--csa-primary), var(--csa-accent), var(--csa-primary));
    background-size: 200% 100%;
    animation: csa-shimmer 4s ease infinite;
    z-index: 2;
}

@keyframes csa-shimmer {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

.csa-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: linear-gradient(135deg, var(--csa-primary-dark) 0%, var(--csa-primary) 60%, #0a5c7a 100%);
    border-bottom: 1px solid rgba(199, 253, 10, 0.15);
    position: relative;
}

.csa-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--csa-accent-mid), transparent);
}

.csa-avatar {
    position: relative;
    width: 50px;
    height: 50px;
    flex-shrink: 0;
}

.csa-avatar-inner {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--csa-dark-3), var(--csa-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    position: relative;
    z-index: 1;
    box-shadow: 0 0 0 2px var(--csa-accent), 0 0 16px rgba(199, 253, 10, 0.25);
    border: 2px solid var(--csa-primary);
}

.csa-pulse {
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid var(--csa-accent);
    animation: csa-pulse 2.2s ease-out infinite;
    opacity: 0.55;
}

@keyframes csa-pulse {
    0% { transform: scale(0.85); opacity: 0.6; }
    70% { transform: scale(1.3); opacity: 0; }
    100% { transform: scale(1.3); opacity: 0; }
}

.csa-title {
    font-weight: 700;
    font-size: 15px;
    color: #ffffff;
    letter-spacing: -0.01em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

.csa-status {
    font-size: 12px;
    color: var(--csa-accent);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 3px;
    font-weight: 500;
}

.csa-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--csa-accent);
    box-shadow: 0 0 10px var(--csa-accent);
    animation: csa-blink 1.6s infinite;
}

@keyframes csa-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

.csa-messages {
    height: 340px;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scroll-behavior: smooth;
    background:
        radial-gradient(ellipse at top left, rgba(8, 79, 107, 0.18), transparent 55%),
        radial-gradient(ellipse at bottom right, rgba(199, 253, 10, 0.04), transparent 50%),
        var(--csa-dark-2);
}

.csa-messages::-webkit-scrollbar { width: 5px; }
.csa-messages::-webkit-scrollbar-track { background: transparent; }
.csa-messages::-webkit-scrollbar-thumb {
    background: rgba(8, 79, 107, 0.5);
    border-radius: 10px;
}
.csa-messages::-webkit-scrollbar-thumb:hover { background: var(--csa-primary); }

.csa-msg {
    max-width: 88%;
    padding: 11px 15px;
    border-radius: 14px;
    font-size: 13.5px;
    line-height: 1.7;
    animation: csa-fadeInUp 0.38s cubic-bezier(0.22, 1, 0.36, 1);
    word-wrap: break-word;
}

@keyframes csa-fadeInUp {
    from { opacity: 0; transform: translateY(14px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.csa-msg-bot {
    align-self: flex-start;
    background: linear-gradient(145deg, var(--csa-surface) 0%, var(--csa-surface-elevated) 100%);
    border: 1px solid rgba(8, 79, 107, 0.35);
    border-bottom-right-radius: 4px;
    color: var(--csa-text);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.csa-msg-user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--csa-primary) 0%, var(--csa-primary-dark) 100%);
    color: #ffffff;
    border-bottom-left-radius: 4px;
    box-shadow: 0 3px 12px rgba(8, 79, 107, 0.35);
    border: 1px solid rgba(199, 253, 10, 0.12);
}

.csa-msg-system {
    align-self: center;
    background: transparent;
    color: var(--csa-text-dim);
    font-size: 12px;
    text-align: center;
    max-width: 100%;
    padding: 6px 10px;
}

.csa-typing {
    display: flex;
    gap: 5px;
    padding: 14px 18px;
    align-self: flex-start;
    background: var(--csa-surface);
    border-radius: 14px;
    border-bottom-right-radius: 4px;
    border: 1px solid rgba(8, 79, 107, 0.3);
}

.csa-typing span {
    width: 7px;
    height: 7px;
    background: var(--csa-accent);
    border-radius: 50%;
    animation: csa-typing 1.25s infinite ease-in-out;
    box-shadow: 0 0 6px rgba(199, 253, 10, 0.4);
}
.csa-typing span:nth-child(2) { animation-delay: 0.15s; }
.csa-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes csa-typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.35; }
    30% { transform: translateY(-7px); opacity: 1; }
}

.csa-related {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed rgba(8, 79, 107, 0.4);
}

.csa-related-title {
    font-size: 11px;
    color: var(--csa-text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

.csa-related-item {
    display: block;
    width: 100%;
    text-align: right;
    background: var(--csa-accent-soft);
    border: 1px solid rgba(199, 253, 10, 0.22);
    color: #e8f5a0;
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 12.5px;
    margin-bottom: 6px;
    cursor: pointer;
    transition: all 0.22s ease;
    font-family: inherit;
}
.csa-related-item:hover {
    background: var(--csa-accent-mid);
    border-color: var(--csa-accent);
    color: var(--csa-dark);
    transform: translateX(-3px);
    box-shadow: 0 2px 10px rgba(199, 253, 10, 0.2);
}

.csa-score {
    font-size: 10px;
    opacity: 0.7;
    margin-right: 6px;
    color: var(--csa-accent);
}
.csa-related-item:hover .csa-score {
    color: var(--csa-primary-dark);
}



.csa-course-label {
    font-size: 13px;
    margin-bottom: 10px;
    color: var(--csa-text-muted);
}

.csa-course-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.csa-course-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: var(--csa-dark-2);
    border: 1px solid rgba(8, 79, 107, 0.4);
    border-radius: var(--csa-radius-sm);
    color: var(--csa-text);
    cursor: pointer;
    transition: all 0.22s ease;
    font-size: 13.5px;
    text-align: right;
    font-family: inherit;
}
.csa-course-btn:hover {
    border-color: var(--csa-accent);
    background: rgba(8, 79, 107, 0.35);
    transform: translateX(-4px);
    box-shadow: var(--csa-glow);
}
.csa-course-btn .csa-course-icon { font-size: 18px; }

.csa-input-area {
    padding: 12px 14px 14px;
    border-top: 1px solid rgba(8, 79, 107, 0.3);
    background: linear-gradient(180deg, var(--csa-surface) 0%, var(--csa-dark) 100%);
}

.csa-current-course {
    font-size: 11px;
    color: var(--csa-text-muted);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.csa-current-course button {
    background: none;
    border: none;
    color: var(--csa-accent);
    font-size: 11px;
    cursor: pointer;
    padding: 0;
    font-family: inherit;
    font-weight: 500;
    transition: color 0.2s;
}
.csa-current-course button:hover {
    color: #e0ff4a;
    text-decoration: underline;
}

.csa-input-row {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

#csa-input {
    flex: 1;
    background: var(--csa-dark-2);
    border: 1px solid rgba(8, 79, 107, 0.45);
    border-radius: var(--csa-radius-sm);
    padding: 11px 14px;
    color: var(--csa-text);
    font-size: 13.5px;
    resize: none;
    max-height: 100px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    direction: rtl;
    line-height: 1.5;
}
#csa-input:focus {
    outline: none;
    border-color: var(--csa-primary);
    box-shadow: 0 0 0 3px rgba(8, 79, 107, 0.35), 0 0 12px rgba(199, 253, 10, 0.08);
}
#csa-input::placeholder { color: var(--csa-text-dim); }

.csa-send-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--csa-radius-sm);
    background: linear-gradient(145deg, var(--csa-accent) 0%, #b0e600 100%);
    border: none;
    color: var(--csa-dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, box-shadow 0.2s;
    flex-shrink: 0;
    box-shadow: 0 3px 12px rgba(199, 253, 10, 0.3);
}
.csa-send-btn:hover {
    transform: scale(1.06);
    box-shadow: 0 5px 18px rgba(199, 253, 10, 0.45);
}
.csa-send-btn:active { transform: scale(0.94); }
.csa-send-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.csa-send-btn svg { transform: rotate(180deg); }

.csa-footer {
    text-align: center;
    padding: 9px;
    font-size: 10px;
    color: var(--csa-text-dim);
    background: var(--csa-dark);
    border-top: 1px solid var(--csa-border);
    letter-spacing: 0.02em;
}

.csa-no-access {
    padding: 36px 20px;
    text-align: center;
    color: var(--csa-text-muted);
}
.csa-no-access a { color: var(--csa-accent); }

.csa-best-answer { position: relative; }

@media (max-width: 480px) {
    .csa-agent {
        max-width: 100%;
        margin: 10px 0;
        border-radius: 14px;
    }
    .csa-messages { height: 280px; }
}

/* ===== Quota bar (daily message limit) ===== */
.csa-quota {
    padding: 8px 14px 10px;
    background: linear-gradient(180deg, rgba(8, 79, 107, 0.25), rgba(8, 79, 107, 0.08));
    border-bottom: 1px solid var(--csa-border);
}
.csa-quota-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--csa-text-muted);
    margin-bottom: 6px;
}
.csa-quota-label {
    font-weight: 600;
    color: var(--csa-accent);
    letter-spacing: 0.02em;
}
.csa-quota-nums {
    font-variant-numeric: tabular-nums;
    direction: ltr;
    unicode-bidi: isolate;
}
.csa-quota-bar {
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 99px;
    overflow: hidden;
}
.csa-quota-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #102C59, #DAC0A3);
    border-radius: 99px;
    transition: width 0.45s ease;
}
.csa-quota-warn .csa-quota-fill {
    background: linear-gradient(90deg, #f59e0b, #DAC0A3);
}
.csa-quota-full .csa-quota-fill {
    background: linear-gradient(90deg, #ef4444, #f97316);
}
.csa-quota-full .csa-quota-nums {
    color: #fca5a5;
}

.csa-debug-badge {
    display: inline-block;
    margin: 4px 12px 10px;
    padding: 4px 10px;
    font-size: 10px;
    line-height: 1.4;
    color: var(--csa-text-dim);
    background: rgba(8, 79, 107, 0.35);
    border: 1px dashed var(--csa-border);
    border-radius: 8px;
    direction: rtl;
    max-width: 92%;
    word-break: break-word;
}

/* ===== Floating launcher ===== */
.csa-float-root {
    position: fixed;
    bottom: 24px;
    z-index: 99999;
    font-family: inherit;
}
.csa-float-left { left: 20px; }
.csa-float-right { right: 20px; }

.csa-float-btn {
    position: relative;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(145deg, var(--csa-primary, #102C59), #1a3f7a);
    box-shadow: 0 8px 28px rgba(16, 44, 89, 0.45), 0 0 0 0 rgba(218, 192, 163, 0.5);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: csa-float-bob 3s ease-in-out infinite;
}
.csa-float-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(16, 44, 89, 0.55);
}
.csa-float-icon { position: relative; z-index: 2; display: flex; }
.csa-float-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--csa-accent, #DAC0A3);
    opacity: 0.35;
    animation: csa-pulse-ring 2s ease-out infinite;
    z-index: 1;
}
@keyframes csa-pulse-ring {
    0% { transform: scale(1); opacity: 0.4; }
    100% { transform: scale(1.55); opacity: 0; }
}
@keyframes csa-float-bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.csa-float-tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    white-space: nowrap;
    background: var(--csa-primary, #102C59);
    color: var(--csa-accent, #DAC0A3);
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 8px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}
.csa-float-left .csa-float-tooltip { left: 0; }
.csa-float-right .csa-float-tooltip { right: 0; }
.csa-float-btn:hover + .csa-float-tooltip { opacity: 1; }

.csa-float-panel {
    position: absolute;
    bottom: calc(100% + 16px);
    width: min(400px, calc(100vw - 32px));
    max-height: min(640px, calc(100vh - 100px));
    background: #0b1a33;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.35);
    border: 1px solid rgba(218,192,163,0.25);
    display: flex;
    flex-direction: column;
}
.csa-float-left .csa-float-panel { left: 0; }
.csa-float-right .csa-float-panel { right: 0; }
.csa-float-panel[hidden] { display: none !important; }
.csa-float-panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--csa-primary, #102C59);
    color: var(--csa-accent, #DAC0A3);
    font-size: 13px;
    font-weight: 600;
}
.csa-float-panel-head button {
    background: transparent;
    border: none;
    color: inherit;
    font-size: 22px;
    cursor: pointer;
    line-height: 1;
}
.csa-float-panel-body {
    overflow: auto;
    max-height: min(580px, calc(100vh - 140px));
}
.csa-float-panel-body .csa-agent {
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    max-width: 100%;
}

/* Map old CSS vars to new brand if not set */
.csa-agent {
    --csa-dark: #0b1a33;
}

.csa-course-select {
    padding: 12px 14px 16px;
    border-bottom: 1px solid var(--csa-border);
}
.csa-course-label {
    font-size: 12px;
    color: var(--csa-text-muted);
    margin-bottom: 10px;
}
.csa-course-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 100%;
}
.csa-course-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--csa-border-strong, rgba(16,44,89,0.35));
    background: linear-gradient(135deg, rgba(16,44,89,0.35), rgba(11,26,51,0.8));
    color: var(--csa-text, #f5f0e8);
    font-size: 13px;
    text-align: right;
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s, box-shadow 0.15s;
    overflow: hidden;
}
.csa-course-btn .csa-course-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.csa-course-btn:hover {
    transform: translateY(-1px);
    border-color: var(--csa-accent, #DAC0A3);
    box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}
.csa-course-btn .csa-course-icon { font-size: 18px; flex-shrink: 0; }