:root {
    --kittu-surface: rgba(255, 255, 255, 0.95);
    --kittu-shadow: 0 18px 40px rgba(17, 24, 39, 0.16);
    --kittu-shadow-soft: 0 12px 24px rgba(17, 24, 39, 0.12);
    --kittu-border: rgba(29, 154, 138, 0.3);
    --kittu-accent: #1d9a8a;
    --kittu-accent-600: #117a6d;
    --kittu-muted: #5f6f7a;
    --kittu-text: #1f2a30;
    --kittu-radius: 18px;
    --kittu-focus: #1d9a8a;
}

#kittu-widget {
    position: fixed;
    inset: auto 1.5rem 1.5rem auto;
    z-index: 999;
    display: grid;
    place-items: end;
    gap: 1rem;
}

.kittu-button {
    background: linear-gradient(135deg, #f1f5f9, #cbd5f5);
    border: none;
    border-radius: 50%;
    width: 84px;
    height: 84px;
    display: grid;
    place-items: center;
    box-shadow: 0 16px 36px rgba(79, 70, 229, 0.22);
    cursor: grab;
    touch-action: none;
    transition: transform 180ms ease, box-shadow 180ms ease;
    animation: kittu-glow 4.8s ease-in-out infinite;
    position: relative;
}

.kittu-button:active {
    cursor: grabbing;
}

.kittu-button::before {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    background: radial-gradient(circle at center, rgba(29, 154, 138, 0.6) 0%, rgba(29, 154, 138, 0.35) 40%, rgba(29, 154, 138, 0.0) 70%);
    opacity: 0.65;
    filter: blur(0.5px);
    z-index: -1;
    animation: kittu-halo 5.4s ease-in-out infinite;
}

.kittu-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 22px 50px rgba(15, 23, 42, 0.2);
    animation-play-state: paused;
}

.kittu-button:hover::before {
    animation-play-state: paused;
}

.kittu-button:focus-visible {
    outline: 3px solid var(--kittu-focus);
    outline-offset: 4px;
    animation-play-state: paused;
}

.kittu-button:focus-visible::before {
    animation-play-state: paused;
}

.kittu-button:focus-visible {
    animation-play-state: paused;
}

.kittu-cat .cat-body {
    fill: #b8bcc6;
}

.kittu-cat .cat-ear path {
    fill: #9fa5b1;
}

.kittu-cat .cat-face .cat-eye {
    fill: #1f2933;
}

.kittu-cat .cat-face .cat-mouth,
.kittu-cat .cat-face .cat-nose,
.kittu-cat .cat-face .cat-whisker {
    stroke: #1f2933;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.kittu-cat .cat-blush {
    fill: rgba(29, 154, 138, 0.28);
}

.kittu-cat .cat-tail path {
    fill: none;
    stroke: #b8bcc6;
    stroke-width: 7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.kittu-cat {
    animation: kittu-float 6s ease-in-out infinite;
}

.cat-tail {
    animation: kittu-tail 2.6s ease-in-out infinite;
    transform-origin: 85px 85px;
}

.kittu-dialog {
    position: fixed;
    inset: auto 1.5rem 1.5rem auto;
    max-width: min(420px, 90vw);
    max-height: 85vh;   /* was fixed height, now flexible */
    height: auto;       /* allow natural growth */
    background: var(--kittu-surface);
    border-radius: var(--kittu-radius);
    box-shadow: var(--kittu-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;   /* ensure clean scroll */
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
    transition: transform 200ms ease, opacity 200ms ease;
    z-index: 1002;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.kittu-dialog[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.kittu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms ease;
    z-index: 995;
}

.kittu-overlay[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
}

.kittu-dialog__header {
    padding: 1.4rem 1.6rem 1rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-shrink: 0;
    background: white;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.kittu-dialog__title {
    font-size: 1.25rem;
    margin: 0;
    color: var(--kittu-text);
}

.kittu-dialog__subtitle {
    margin: 0.25rem 0 0;
    color: var(--kittu-muted);
    font-size: 0.9rem;
}

.kittu-dialog__close {
    border: none;
    background: transparent;
    color: var(--kittu-muted);
    font-size: 1.8rem;
    line-height: 1;
    padding: 0.2rem;
    cursor: pointer;
}

.kittu-dialog__close:focus-visible {
    outline: 3px solid var(--kittu-focus);
    outline-offset: 4px;
}

.kittu-dialog__chips {
    max-height: 120px;  /* allow scrolling if many chips */
    overflow-y: auto;
}

.kittu-chip {
    border: 1px solid var(--kittu-border);
    background: rgba(29, 154, 138, 0.12);
    border-radius: 999px;
    padding: 0.4rem 0.95rem;
    font-size: 0.85rem;
    color: var(--kittu-text);
    cursor: pointer;
    transition: background 150ms ease, transform 150ms ease;
}

.kittu-chip:hover,
.kittu-chip:focus-visible {
    background: rgba(29, 154, 138, 0.24);
    transform: translateY(-2px);
    outline: none;
}

.kittu-dialog__messages {
    flex: 1 1 auto;     /* allow shrink + grow */
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem 1.2rem;
    background: rgba(248, 250, 252, 0.5);
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    max-height: none;   /* remove strict calc() */
    min-height: 180px;  /* reduced to fit better */
    scroll-behavior: smooth;
}

.kittu-messages {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 200px;
    padding-bottom: 1rem;
}

.kittu-message {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.95rem;
    line-height: 1.45;
    margin-bottom: 1rem;
}

.kittu-message__bubble {
    padding: 0.85rem 1rem;
    border-radius: 16px;
    box-shadow: var(--kittu-shadow-soft);
    max-width: 85%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.kittu-message--assistant .kittu-message__bubble {
    background: rgba(29, 154, 138, 0.12);
    border: 1px solid rgba(29, 154, 138, 0.3);
    color: var(--kittu-text);
    margin-left: 0;
}

.kittu-message--user {
    align-items: flex-end;
}

.kittu-message--user .kittu-message__bubble {
    background: var(--kittu-accent);
    color: white;
    margin-left: auto;
    margin-right: 0;
    max-width: 85%;
}

.kittu-message__meta {
    font-size: 0.75rem;
    color: var(--kittu-muted);
    margin-top: 4px;
    align-self: flex-start;
}

.kittu-dialog__form {
    display: grid;
    gap: 0.75rem;
    padding: 1rem 1.6rem 1.4rem;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    background: white;
    flex-shrink: 0;     /* keep always visible */
}

.kittu-dialog__form textarea {
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 14px;
    padding: 0.85rem;
    resize: vertical;
    min-height: 70px;
    max-height: 120px;
    font-size: 0.95rem;
    color: var(--kittu-text);
    font-family: inherit;
    background: white;
}

.kittu-dialog__form textarea:focus-visible {
    outline: 3px solid var(--kittu-focus);
    outline-offset: 2px;
}

.kittu-dialog__form .btn {
    justify-self: end;
    border-radius: 12px;
    padding: 0.55rem 1.4rem;
    visibility: visible;
    opacity: 1;
    z-index: 10;
    position: relative;
    display: inline-block;
}

.kittu-dialog__disclaimer {
    padding: 0.85rem 1.6rem 1.2rem;
    background: rgba(79, 70, 229, 0.05);
    font-size: 0.8rem;
    color: var(--kittu-muted);
    flex-shrink: 0;     /* keep always visible */
    visibility: visible;
    opacity: 1;
    z-index: 10;
    position: relative;
}

.kittu-message--error .kittu-message__bubble {
    background: rgba(239, 68, 68, 0.16);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #991b1b;
}

.kittu-message--thinking .kittu-message__bubble {
    background: rgba(79, 70, 229, 0.08);
    border: 1px solid rgba(79, 70, 229, 0.2);
    color: var(--kittu-muted);
    font-style: italic;
    opacity: 0.8;
    animation: kittu-thinking-pulse 2s ease-in-out infinite;
}

.kittu-message--thinking .cat-tail {
    animation-duration: 1.2s;
}

/* Mood variations */
.kittu-mood--love .cat-eye {
    fill: #ff4d67;
}

.kittu-mood--love .cat-mouth {
    stroke: #ff4d67;
}

.kittu-mood--irritated .cat-eye {
    transform: rotate(12deg);
    transform-origin: center;
}

.kittu-mood--irritated .cat-ear path {
    fill: #b3b3b3;
}

.kittu-mood--bored .cat-eye {
    transform: scaleY(0.6);
    transform-origin: center;
}

.kittu-mood--curious .cat-eye {
    transform: translate(-2px, -2px);
}

.kittu-mood--proud .cat-mouth {
    stroke: var(--kittu-accent-600);
}

.kittu-mood--thinking .cat-tail {
    animation-duration: 1.4s;
}

@keyframes kittu-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes kittu-tail {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(14deg); }
}

@keyframes kittu-glow {
    0%, 100% {
        box-shadow: 0 16px 36px rgba(79, 70, 229, 0.22), 0 0 0 0 rgba(29, 154, 138, 0.0);
    }
    50% {
        box-shadow: 0 18px 42px rgba(79, 70, 229, 0.28), 0 0 14px 6px rgba(29, 154, 138, 0.35);
    }
}

@keyframes kittu-halo {
    0%, 100% {
        transform: scale(1);
        opacity: 0.65;
    }
    50% {
        transform: scale(1.08);
        opacity: 0.9;
    }
}

@keyframes kittu-thinking-pulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.02);
    }
}

/* Login Modal Styles */
.kittu-login-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1005;
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms ease;
    backdrop-filter: blur(4px);
}

.kittu-login-modal[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
}

.kittu-login-content {
    background: var(--kittu-surface);
    border-radius: 24px;
    max-width: 480px;
    width: calc(100% - 2rem);
    margin: 1rem;
    box-shadow: 0 20px 60px rgba(17, 24, 39, 0.3);
    border: 1px solid rgba(148, 163, 184, 0.2);
    transform: translateY(20px) scale(0.95);
    transition: transform 300ms ease;
    overflow: hidden;
}

.kittu-login-modal[data-open="true"] .kittu-login-content {
    transform: translateY(0) scale(1);
}

.kittu-login-header {
    padding: 2rem 2rem 1rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(29, 154, 138, 0.1), rgba(79, 70, 229, 0.05));
}

.kittu-login-cat {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    animation: kittu-float 3s ease-in-out infinite;
}

.kittu-login-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--kittu-text);
    margin: 0 0 0.5rem;
}

.kittu-login-subtitle {
    color: var(--kittu-muted);
    font-size: 1rem;
    margin: 0;
}

.kittu-login-chat {
    padding: 1.5rem 2rem;
    background: rgba(248, 250, 252, 0.5);
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.kittu-login-messages {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.kittu-login-message {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.kittu-login-message--user {
    align-items: flex-end;
}

.kittu-login-message--assistant {
    align-items: flex-start;
}

.kittu-login-bubble {
    padding: 0.75rem 1rem;
    border-radius: 16px;
    max-width: 85%;
    font-size: 0.9rem;
    line-height: 1.4;
    animation: kittu-message-appear 0.6s ease-out;
}

.kittu-login-message--user .kittu-login-bubble {
    background: var(--kittu-accent);
    color: white;
}

.kittu-login-message--assistant .kittu-login-bubble {
    background: rgba(29, 154, 138, 0.12);
    border: 1px solid rgba(29, 154, 138, 0.3);
    color: var(--kittu-text);
}

.kittu-login-actions {
    padding: 1.5rem 2rem 2rem;
    display: flex;
    gap: 1rem;
    flex-direction: column;
}

.kittu-login-btn {
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 200ms ease;
    text-decoration: none;
    text-align: center;
    display: inline-block;
}

.kittu-login-btn--primary {
    background: linear-gradient(135deg, var(--kittu-accent), var(--kittu-accent-600));
    color: white;
    box-shadow: 0 4px 12px rgba(29, 154, 138, 0.3);
}

.kittu-login-btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(29, 154, 138, 0.4);
}

.kittu-login-btn--secondary {
    background: transparent;
    color: var(--kittu-muted);
    border: 1px solid rgba(148, 163, 184, 0.3);
}

.kittu-login-btn--secondary:hover {
    background: rgba(148, 163, 184, 0.1);
    color: var(--kittu-text);
}

.kittu-login-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.kittu-login-feature {
    text-align: center;
    padding: 0.75rem;
    background: rgba(29, 154, 138, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(29, 154, 138, 0.1);
}

.kittu-login-feature-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.kittu-login-feature-text {
    font-size: 0.8rem;
    color: var(--kittu-muted);
    margin: 0;
}

@keyframes kittu-message-appear {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 640px) {
    .kittu-login-content {
        margin: 0.5rem;
        border-radius: 16px;
    }

    .kittu-login-header,
    .kittu-login-chat,
    .kittu-login-actions {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .kittu-login-features {
        grid-template-columns: 1fr;
    }
}

/* Push kittu above mobile bottom nav bar (visible below lg / 992px) */
@media (max-width: 991px) {
    #kittu-widget {
        inset: auto 1.5rem 4.5rem auto;
    }
}

@media (max-width: 640px) {
    #kittu-widget {
        inset: auto 1rem 4.5rem auto;
    }

    .kittu-dialog {
        width: calc(100vw - 2rem);
        inset: auto 1rem 4.5rem 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .kittu-button,
    .kittu-cat,
    .cat-tail,
    .kittu-dialog,
    .kittu-overlay,
    .kittu-chip {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}