/* ===== Edu Ai sohbet ===== */
.edu-ai-overlay {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(8, 24, 48, 0.55);
    backdrop-filter: blur(8px);
}
.edu-ai-overlay[hidden] { display: none !important; }
.edu-ai-panel {
    width: min(980px, 100%);
    max-height: min(92vh, 820px);
    display: flex;
    flex-direction: column;
    border-radius: 22px;
    overflow: hidden;
    background:
        radial-gradient(1200px 400px at 10% -10%, rgba(56, 189, 248, 0.18), transparent 55%),
        radial-gradient(900px 360px at 100% 0%, rgba(99, 102, 241, 0.16), transparent 50%),
        linear-gradient(180deg, #0b1f3a 0%, #102a4a 40%, #0f2744 100%);
    color: #e8eef8;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.edu-ai-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.edu-ai-brand { display: flex; align-items: center; gap: 12px; }
.edu-ai-orb {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: conic-gradient(from 180deg, #38bdf8, #818cf8, #34d399, #38bdf8);
    box-shadow: 0 0 24px rgba(56, 189, 248, 0.35);
    animation: edu-ai-spin 8s linear infinite;
}
@keyframes edu-ai-spin { to { transform: rotate(1turn); } }
.edu-ai-kicker {
    margin: 0;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(226, 232, 240, 0.55);
}
.edu-ai-head h2 {
    margin: 2px 0 0;
    font-family: var(--display);
    font-size: 1.25rem;
    color: #fff;
}
.edu-ai-head-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.edu-ai-credits {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(125, 211, 252, 0.28);
    color: #e2e8f0;
}
.edu-ai-credits-label {
    font-size: 0.7rem;
    font-weight: 650;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(186, 230, 253, 0.75);
}
.edu-ai-credits strong {
    font-size: 0.95rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    color: #fff;
}
.edu-ai-credits-unit {
    font-weight: 650;
    color: rgba(226, 232, 240, 0.72);
}
.edu-ai-credits.is-low {
    background: rgba(251, 191, 36, 0.14);
    border-color: rgba(251, 191, 36, 0.35);
}
.edu-ai-credits.is-low .edu-ai-credits-label { color: rgba(253, 230, 138, 0.85); }
.edu-ai-credits.is-empty {
    background: rgba(248, 113, 113, 0.14);
    border-color: rgba(248, 113, 113, 0.35);
}
.edu-ai-credits.is-empty .edu-ai-credits-label { color: rgba(254, 202, 202, 0.9); }
.edu-ai-credits.is-tick {
    animation: edu-ai-credit-tick 0.45s ease;
}
@keyframes edu-ai-credit-tick {
    0% { transform: scale(1); }
    35% { transform: scale(1.08); }
    100% { transform: scale(1); }
}
.edu-ai-close {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 0;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    cursor: pointer;
    display: grid;
    place-items: center;
}
.edu-ai-body {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: 1.2fr 0.9fr;
}
.edu-ai-chat {
    overflow: auto;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
}
.edu-ai-msg {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    max-width: 95%;
}
.edu-ai-msg.is-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}
.edu-ai-avatar {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    flex: none;
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    font-weight: 800;
    background: linear-gradient(140deg, #38bdf8, #6366f1);
    color: #fff;
}
.edu-ai-msg.is-user .edu-ai-avatar { background: rgba(255, 255, 255, 0.15); }
.edu-ai-bubble {
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    line-height: 1.45;
    font-size: 0.92rem;
}
.edu-ai-bubble strong { display: block; margin-bottom: 4px; color: #fff; }
.edu-ai-bubble p { margin: 0; color: rgba(226, 232, 240, 0.88); }
.edu-ai-bubble.is-loading { display: flex; gap: 6px; align-items: center; }
.edu-ai-bubble.is-loading i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #94a3b8;
    animation: edu-ai-dot 1s infinite ease-in-out;
}
.edu-ai-bubble.is-loading i:nth-child(2) { animation-delay: 0.15s; }
.edu-ai-bubble.is-loading i:nth-child(3) { animation-delay: 0.3s; }
@keyframes edu-ai-dot {
    0%, 80%, 100% { opacity: 0.35; transform: translateY(0); }
    40% { opacity: 1; transform: translateY(-3px); }
}
.edu-ai-preview {
    overflow: auto;
    padding: 14px;
    background: rgba(0, 0, 0, 0.18);
}
.edu-ai-preview[hidden] { display: none !important; }
.edu-ai-preview-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
}
.edu-ai-preview-head h3 { margin: 0; font-size: 0.95rem; color: #fff; }
.edu-ai-preview-list { display: flex; flex-direction: column; gap: 8px; }
.edu-ai-q {
    padding: 10px 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
}
.edu-ai-q strong { display: block; font-size: 0.82rem; color: #fff; margin-bottom: 4px; }
.edu-ai-q p { margin: 0; font-size: 0.78rem; color: rgba(226, 232, 240, 0.75); line-height: 1.35; }
.edu-ai-composer {
    padding: 14px 16px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.edu-ai-field { display: flex; flex-direction: column; gap: 4px; }
.edu-ai-field span,
.edu-ai-controls label span {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(226, 232, 240, 0.55);
}
.edu-ai-field textarea,
.edu-ai-controls select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(15, 23, 42, 0.92);
    color: #f8fafc;
    padding: 10px 12px;
    font: inherit;
    resize: vertical;
    color-scheme: dark;
    accent-color: #38bdf8;
}
.edu-ai-field textarea:focus,
.edu-ai-controls select:focus {
    outline: none;
    border-color: rgba(56, 189, 248, 0.55);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}
.edu-ai-controls select {
    appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, rgba(248, 250, 252, 0.75) 50%),
        linear-gradient(135deg, rgba(248, 250, 252, 0.75) 50%, transparent 50%),
        linear-gradient(rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.92));
    background-position:
        calc(100% - 16px) calc(50% - 2px),
        calc(100% - 11px) calc(50% - 2px),
        0 0;
    background-size: 5px 5px, 5px 5px, 100% 100%;
    background-repeat: no-repeat;
    padding-right: 28px;
    cursor: pointer;
}
.edu-ai-controls select option,
.edu-ai-controls select optgroup {
    background-color: #0f172a;
    color: #f8fafc;
}
.edu-ai-panel,
.edu-ai-overlay {
    color-scheme: dark;
}
.edu-ai-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
    gap: 8px;
    align-items: end;
}
.edu-ai-controls label { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.edu-ai-submit { min-width: 96px; justify-content: center; }
body.edu-ai-open { overflow: hidden; }
@media (max-width: 860px) {
    .edu-ai-body { grid-template-columns: 1fr; }
    .edu-ai-chat { border-right: 0; max-height: 36vh; }
    .edu-ai-controls { grid-template-columns: 1fr 1fr; }
    .edu-ai-submit { grid-column: 1 / -1; }
}