html { scroll-behavior: smooth; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #C4B5FD; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #A78BFA; }

/* Markdown */
.markdown { line-height: 1.65; }
.markdown > *:first-child { margin-top: 0; }
.markdown > *:last-child { margin-bottom: 0; }
.markdown p { margin: 0.5em 0; }
.markdown pre {
    background: #1F2937;
    color: #F9FAFB;
    padding: 12px 16px;
    border-radius: 12px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    margin: 0.75em 0;
    line-height: 1.5;
}
.markdown code {
    background: rgba(124, 58, 237, 0.1);
    color: #6D28D9;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88em;
    font-weight: 500;
}
.markdown pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-weight: 400;
}
.markdown ul, .markdown ol { padding-left: 1.5em; margin: 0.5em 0; }
.markdown ul { list-style: disc; }
.markdown ol { list-style: decimal; }
.markdown li { margin: 0.25em 0; }
.markdown strong { font-weight: 700; color: #1F2937; }
.markdown em { font-style: italic; }
.markdown a { color: #7C3AED; text-decoration: underline; }
.markdown h1, .markdown h2, .markdown h3 { font-weight: 700; margin: 0.75em 0 0.35em; color: #1F2937; }
.markdown h1 { font-size: 1.25em; }
.markdown h2 { font-size: 1.15em; }
.markdown h3 { font-size: 1.05em; }
.markdown blockquote {
    border-left: 4px solid #A78BFA;
    padding-left: 12px;
    color: #6B7280;
    margin: 0.5em 0;
}
.markdown table {
    border-collapse: collapse;
    margin: 0.75em 0;
    font-size: 0.9em;
}
.markdown th, .markdown td {
    border: 1px solid #E5E7EB;
    padding: 6px 12px;
}
.markdown th { background: #F3F4F6; font-weight: 600; }

/* When markdown is in user bubble (white text) */
.user-bubble.markdown code,
.user-bubble.markdown strong { color: #FEF3C7; background: rgba(255,255,255,0.2); }

/* Typing dots */
.typing-dots { display: inline-flex; gap: 5px; padding: 10px 16px; align-items: center; }
.typing-dots span {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #A78BFA;
    animation: bounce 1.4s infinite ease-in-out both;
}
.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.6; }
    40% { transform: scale(1); opacity: 1; }
}

/* Message slide-in */
.message-enter {
    animation: slideInMsg 0.35s ease-out;
}
@keyframes slideInMsg {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Keyboard key style */
.kbd {
    display: inline-block;
    padding: 4px 10px;
    background: white;
    border: 1px solid #E5E7EB;
    border-bottom-width: 3px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8em;
    font-weight: 600;
    color: #374151;
    box-shadow: 0 1px 0 rgba(0,0,0,0.04);
    min-width: 24px;
    text-align: center;
}

/* Formula card */
.formula-card { transition: transform 0.2s, box-shadow 0.2s; }
.formula-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(124, 58, 237, 0.12); }

/* Hide formula card when filtered */
.formula-card.hidden-by-filter { display: none; }

/* Reference page — browser-native virtualization for 500+ cards.
   Cards off-screen aren't rendered → smooth scroll + fast initial paint. */
.ref-card {
    content-visibility: auto;
    contain-intrinsic-size: auto 380px;
}

/* Scroll target offset for sticky nav */
.scroll-mt-24 { scroll-margin-top: 6rem; }

/* Soft gradient text */
.gradient-text {
    background: linear-gradient(90deg, #7C3AED, #EC4899, #F59E0B);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Suggestion chips */
.suggestion {
    transition: all 0.2s;
}
.suggestion:hover {
    border-color: #7C3AED;
    background: #F5F3FF;
    transform: translateY(-1px);
}

/* Excel-style grid for latihan */
.excel-grid-wrap {
    overflow-x: auto;
    margin: 0.5em 0 1em;
    border-radius: 12px;
}
.excel-grid {
    border-collapse: separate;
    border-spacing: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background: white;
    min-width: 100%;
}
.excel-grid th, .excel-grid td {
    border: 1px solid #d1d5db;
    padding: 8px 12px;
    min-width: 90px;
    height: 36px;
    white-space: nowrap;
}
.excel-grid .cell-corner,
.excel-grid .cell-colhead,
.excel-grid .cell-rowhead {
    background: #f3f4f6;
    color: #6b7280;
    font-weight: 700;
    font-size: 0.78em;
    text-align: center;
    min-width: 42px;
    width: 42px;
}
.excel-grid .cell-colhead { color: #4b5563; }
.excel-grid .cell-data {
    background: white;
    color: #1f2937;
}
.excel-grid .cell-target {
    background: linear-gradient(135deg, #FEF3C7 0%, #FED7AA 100%);
    border: 2px solid #F59E0B !important;
    color: #92400E;
    font-weight: 700;
    box-shadow: inset 0 0 0 1px white;
}

@media (max-width: 640px) {
    .excel-grid th, .excel-grid td { padding: 6px 8px; min-width: 70px; font-size: 0.75em; }
    .excel-grid .cell-corner,
    .excel-grid .cell-colhead,
    .excel-grid .cell-rowhead { min-width: 32px; width: 32px; }
}

/* Modal */
.modal-fade-in { animation: modalFadeIn 0.18s ease-out; }
.modal-fade-out { animation: modalFadeOut 0.15s ease-out forwards; }
.modal-pop-in { animation: modalPopIn 0.22s cubic-bezier(0.34, 1.56, 0.64, 1); }
.modal-pop-out { animation: modalPopOut 0.15s ease-in forwards; }
@keyframes modalFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalFadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes modalPopIn {
    0%   { opacity: 0; transform: scale(0.92) translateY(8px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes modalPopOut {
    0%   { opacity: 1; transform: scale(1); }
    100% { opacity: 0; transform: scale(0.96); }
}

/* Code in formula syntax */
.syntax-block {
    font-family: 'JetBrains Mono', monospace;
    background: #1F2937;
    color: #FBBF24;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.85em;
    overflow-x: auto;
    max-width: 100%;
}
.syntax-block .arg { color: #67E8F9; }
.syntax-block .opt { color: #94A3B8; font-style: italic; }

/* Mobile overflow safety — break long unspaced code (formulas, URLs) so they don't
   push the card wider than the viewport. Only applies to code in card contexts. */
.formula-card code.block,
.formula-card code { overflow-wrap: anywhere; word-break: break-word; }
.formula-card { min-width: 0; }
.formula-card .syntax-block { white-space: pre-wrap; word-break: break-word; }

/* Inline <code> inside narrow cards should also wrap rather than overflow */
.cheatsheet-prose code,
article code:not(.syntax-block) { overflow-wrap: anywhere; }

/* Defensive: prevent any descendant of <article> on small screens from blowing out width.
   Required for iOS Safari which is stricter about anonymous flex items + emoji + text mixing.
   Targets only narrow viewports — keeps richer behavior on desktop. */
@media (max-width: 640px) {
    article { min-width: 0; }
    article section { overflow-x: hidden; min-width: 0; }
    article section > *,
    article section .grid,
    article section .flex { min-width: 0; }
    article pre { max-width: 100%; }
    article .syntax-block { white-space: pre-wrap; overflow-wrap: anywhere; }
}