/* ========================================================================
   Personal AI Assistant — floating widget
   Vanilla CSS, no build step. Reuses the portfolio's own custom properties
   (colours, fonts, radii, shadows) from styles.css so the widget reads as
   part of the site rather than a bolted-on app. See styles.css :root.
   ======================================================================== */

.ai-assistant .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.ai-assistant {
    position: fixed;
    right: 24px;
    bottom: 100px; /* clears .scroll-top-btn, which sits at bottom:30px */
    z-index: 1001; /* above the navbar (1000) */
    font-family: var(--font-body);
}

/* ------------------------------------------------------------- toggle btn */

.ai-assistant-toggle {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.85rem 1.15rem;
    border: none;
    border-radius: 999px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg), var(--glow-sm);
    transition: var(--transition);
}

.ai-assistant-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-md);
}

.ai-assistant-toggle svg {
    width: 20px;
    height: 20px;
    flex: none;
}

.ai-assistant-toggle .ai-assistant-icon-close {
    display: none;
}

.ai-assistant[data-state="open"] .ai-assistant-toggle .ai-assistant-icon-open {
    display: none;
}

.ai-assistant[data-state="open"] .ai-assistant-toggle .ai-assistant-icon-close {
    display: block;
}

/* Hidden entirely while the panel is open - the panel's own header close
   button is the only close control then, and hiding the toggle frees the
   vertical room it used to reserve below the panel (see .ai-assistant-panel
   height below). It reappears the moment the panel closes, ready to be
   clicked to reopen it. */
.ai-assistant[data-state="open"] .ai-assistant-toggle {
    display: none;
}

/* Pulsing dot the first time a visitor sees the button - draws the eye
   without being an animated attention hog forever. */
.ai-assistant-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--neon-bright);
    box-shadow: 0 0 0 rgba(34, 211, 238, 0.6);
    animation: ai-assistant-pulse 2.2s ease-out infinite;
    flex: none;
}

@keyframes ai-assistant-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.55); }
    70%  { box-shadow: 0 0 0 9px rgba(34, 211, 238, 0); }
    100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0); }
}

/* ------------------------------------------------------------------ panel */

.ai-assistant-panel {
    position: absolute;
    right: 0;
    bottom: calc(100% + 14px);
    width: min(480px, calc(100vw - 48px));
    height: min(680px, calc(100vh - 130px));
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: var(--shadow-lg), var(--glow-md);
    overflow: hidden;
    min-width: 320px;
    min-height: 420px;
    max-width: min(720px, calc(100vw - 48px));
    max-height: min(860px, calc(100vh - 40px));
}

/* Right/bottom stay anchored (see above), so dragging these grow the panel
   to the left / upward - the visitor's own reading-size preference, bounded
   by the min/max above so it can never swallow the whole viewport. Plain
   CSS `resize` only ever offers a corner grip, not an edge one, so this is
   a small hand-rolled drag instead (wired up in assistant-widget.js). */
/* Kept inside the box (not overhanging the edge) because the panel clips
   its children to the rounded corners with overflow: hidden - an
   overhanging handle would get partly clipped and lose hit area. */
.ai-assistant-resize-x {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    cursor: ew-resize;
    z-index: 2;
    touch-action: none;
}

.ai-assistant-resize-y {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 6px;
    cursor: ns-resize;
    z-index: 2;
    touch-action: none;
}

.ai-assistant-resize-x:hover,
.ai-assistant-resize-x.is-active,
.ai-assistant-resize-y:hover,
.ai-assistant-resize-y.is-active {
    background: var(--neon);
    opacity: 0.35;
}

body.ai-assistant-resizing-x,
body.ai-assistant-resizing-x * {
    cursor: ew-resize !important;
    user-select: none !important;
}

body.ai-assistant-resizing-y,
body.ai-assistant-resizing-y * {
    cursor: ns-resize !important;
    user-select: none !important;
}

.ai-assistant-panel[hidden] {
    display: none;
}

.ai-assistant-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1.1rem 1.2rem;
    background: var(--hero-bg);
    color: var(--hero-text);
    flex: none;
}

.ai-assistant-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.ai-assistant-subtitle {
    font-size: 0.78rem;
    color: rgba(234, 246, 255, 0.78);
    max-width: 30ch;
}

.ai-assistant-close {
    flex: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}

.ai-assistant-close:hover {
    background: rgba(255, 255, 255, 0.24);
}

/* --------------------------------------------------------------------- log */

.ai-assistant-log {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 1rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    background: var(--bg-light);
}

.ai-assistant-intro {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.55;
    padding: 0.2rem 0.1rem 0.4rem;
}

.ai-assistant-msg {
    max-width: 86%;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.ai-assistant-msg.user {
    align-self: flex-end;
    align-items: flex-end;
}

.ai-assistant-msg.bot {
    align-self: flex-start;
    align-items: flex-start;
}

.ai-assistant-bubble {
    padding: 0.65rem 0.85rem;
    border-radius: 14px;
    font-size: 0.87rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.ai-assistant-msg.user .ai-assistant-bubble {
    background: var(--gradient);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.ai-assistant-msg.bot .ai-assistant-bubble {
    background: var(--surface);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.ai-assistant-route {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.12rem 0.5rem;
    border-radius: 999px;
    background: var(--tint-2);
    color: var(--secondary-color);
    border: 1px solid rgba(20, 184, 166, 0.3);
}

.ai-assistant-route[data-route="structured"],
.ai-assistant-route[data-route="tool"] {
    background: rgba(13, 148, 136, 0.12);
    color: var(--status-color);
}

.ai-assistant-route[data-route="refused"] {
    background: rgba(90, 107, 123, 0.12);
    color: var(--text-light);
}

.ai-assistant-citations {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.1rem;
}

.ai-assistant-citation {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.22rem 0.55rem;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.ai-assistant-citation:hover {
    border-color: var(--neon);
    color: var(--secondary-color);
    background: var(--tint-2);
}

.ai-assistant-thinking {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    align-self: flex-start;
    padding: 0.55rem 0.8rem;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-light);
}

.ai-assistant-thinking-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--neon);
    animation: ai-assistant-blink 1.1s ease-in-out infinite;
}

@keyframes ai-assistant-blink {
    0%, 80%, 100% { opacity: 0.25; }
    40% { opacity: 1; }
}

.ai-assistant-error {
    font-size: 0.8rem;
    color: #b1503a;
    background: rgba(177, 80, 58, 0.08);
    border: 1px solid rgba(177, 80, 58, 0.25);
    border-radius: 10px;
    padding: 0.6rem 0.8rem;
}

/* -------------------------------------------------------------- starters */

.ai-assistant-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0 1.1rem 0.8rem;
    flex: none;
    background: var(--bg-light);
}

.ai-assistant-chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--surface);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.ai-assistant-chip:hover:not(:disabled) {
    border-color: var(--neon);
    background: var(--tint-2);
}

.ai-assistant-chip:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ------------------------------------------------------------------ form */

.ai-assistant-form {
    display: flex;
    align-items: flex-end;
    gap: 0.55rem;
    padding: 0.8rem;
    border-top: 1px solid var(--border-color);
    background: var(--surface);
    flex: none;
}

.ai-assistant-input {
    flex: 1 1 auto;
    resize: none;
    max-height: 90px;
    padding: 0.6rem 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: 0.85rem;
    line-height: 1.4;
}

.ai-assistant-input:focus {
    outline: 2px solid var(--neon);
    outline-offset: 1px;
}

.ai-assistant-send {
    flex: none;
    padding: 0.6rem 1.1rem;
    border: none;
    border-radius: 10px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.82rem;
    cursor: pointer;
    transition: var(--transition);
}

.ai-assistant-send:hover:not(:disabled) {
    filter: brightness(1.08);
}

.ai-assistant-send:disabled,
.ai-assistant-input:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.ai-assistant-meta {
    padding: 0 1.1rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-light);
    background: var(--surface);
    flex: none;
}

/* -------------------------------------------------------------- mobile */

@media (max-width: 540px) {
    .ai-assistant {
        right: 16px;
        bottom: 84px;
    }

    .ai-assistant-panel {
        position: fixed;
        left: 12px;
        right: 12px;
        bottom: 84px;
        width: auto;
        height: min(72vh, 640px);
    }

    /* left+right are both pinned here, so a horizontal drag has no room to
       act in - the resize handles only make sense above this breakpoint. */
    .ai-assistant-resize-x,
    .ai-assistant-resize-y {
        display: none;
    }

    .ai-assistant-toggle span {
        display: none;
    }

    .ai-assistant-toggle {
        padding: 0.85rem;
    }
}

/* ------------------------------------------------------------- a11y */

@media (prefers-reduced-motion: reduce) {
    .ai-assistant-dot,
    .ai-assistant-thinking-dot {
        animation: none;
    }
    .ai-assistant-toggle:hover {
        transform: none;
    }
}