@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    touch-action: manipulation;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Soft animated gradient background for the whole page */
    background: linear-gradient(-45deg, #e0eafc, #89f7fe, #66a6ff, #cfdef3);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

/* Mobile: full-screen AI panel */
@media (max-width: 640px) {
    #ai-panel {
        max-width: 100% !important;
        border-left: none !important;
        border-radius: 0 !important;
    }
    /* Fix iOS keyboard pushing viewport */
    body {
        position: fixed;
        width: 100%;
        height: 100%;
    }
}

/* Safe area insets for notched phones */
@supports (padding: env(safe-area-inset-bottom)) {
    #ai-panel .border-t {
        padding-bottom: calc(12px + env(safe-area-inset-bottom));
    }
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Chat background texture */
.main-chat-background {
    /* Using a very subtle elegant dot pattern instead of the blocky SVG */
    background-color: transparent;
    background-image: radial-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Glassmorphism utilities */
.glass-panel {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.glass-chat-me {
    background: linear-gradient(135deg, #2dd4bf, #059669);
    color: white;
    box-shadow: 0 4px 15px rgba(5, 150, 105, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-chat-them {
    background: rgba(255, 255, 255, 0.85);
    color: #1f2937;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

/* Animations */
@keyframes slideUpFade {
    0% { opacity: 0; transform: translateY(12px) scale(0.98); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.animate-message {
    animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Custom Stylish Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.4);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.8);
}

/* ============ AI Panel (Apple-style) ============ */

#ai-panel {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    border-left: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: -16px 0 48px -16px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform 360ms cubic-bezier(0.32, 0.72, 0, 1);
    z-index: 80;
    display: flex;
    flex-direction: column;
}

#ai-panel.open {
    transform: translateX(0);
}

#ai-panel-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    transition: background 360ms cubic-bezier(0.32, 0.72, 0, 1);
    z-index: 75;
    pointer-events: none;
}

#ai-panel-backdrop.open {
    background: rgba(0, 0, 0, 0.12);
    pointer-events: auto;
}

.ai-bubble {
    max-width: 86%;
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 14.5px;
    line-height: 1.5;
    word-wrap: break-word;
    animation: aiBubbleIn 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ai-bubble-user {
    background: #1f2937;
    color: white;
    border-bottom-right-radius: 6px;
    align-self: flex-end;
}

.ai-bubble-assistant {
    background: #f1f5f9;
    color: #0f172a;
    border-bottom-left-radius: 6px;
    align-self: flex-start;
}

.ai-bubble-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
    align-self: stretch;
    max-width: 100%;
    text-align: center;
    border-radius: 14px;
    font-size: 13px;
}

@keyframes aiBubbleIn {
    0% { opacity: 0; transform: translateY(6px) scale(0.98); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.ai-cite {
    display: inline-block;
    background: rgba(79, 70, 229, 0.08);
    color: #4f46e5;
    font-size: 11px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 6px;
    margin: 0 2px;
    cursor: pointer;
    vertical-align: 1px;
    transition: background 160ms;
}

.ai-cite:hover {
    background: rgba(79, 70, 229, 0.18);
}

.ai-suggestion {
    text-align: left;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 12px 14px;
    font-size: 14px;
    color: #1f2937;
    cursor: pointer;
    transition: all 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ai-suggestion:hover {
    border-color: #c7d2fe;
    background: #fafbff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px -8px rgba(79, 70, 229, 0.25);
}

/* Three-dot loading */
.ai-typing {
    display: inline-flex;
    gap: 4px;
    padding: 4px 0;
}
.ai-typing span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #94a3b8;
    animation: aiTyping 1.2s infinite ease-in-out;
}
.ai-typing span:nth-child(2) { animation-delay: 0.18s; }
.ai-typing span:nth-child(3) { animation-delay: 0.36s; }

@keyframes aiTyping {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-3px); }
}

/* Sparkle button */
.ai-sparkle-btn {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 180ms cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 14px -4px rgba(99, 102, 241, 0.55);
    cursor: pointer;
}
.ai-sparkle-btn:hover {
    transform: translateY(-1px) scale(1.03);
    box-shadow: 0 8px 22px -6px rgba(99, 102, 241, 0.7);
}
.ai-sparkle-btn:active {
    transform: translateY(0) scale(0.97);
}

/* Highlight a message in main viewer when cited */
@keyframes citeFlash {
    0% { background: rgba(99, 102, 241, 0.35); }
    100% { background: transparent; }
}
.message-cite-flash > div {
    animation: citeFlash 2.2s ease-out;
}

/* Input field */
.ai-input {
    width: 100%;
    border: 1px solid #e5e7eb;
    background: white;
    border-radius: 22px;
    padding: 11px 44px 11px 16px;
    font-size: 14.5px;
    outline: none;
    transition: all 180ms;
    resize: none;
    min-height: 44px;
    max-height: 140px;
    font-family: inherit;
}
.ai-input:focus {
    border-color: #c7d2fe;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

.ai-send {
    position: absolute;
    right: 6px;
    bottom: 6px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #1f2937;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 160ms;
}
.ai-send:disabled {
    background: #e5e7eb;
    color: #9ca3af;
    cursor: not-allowed;
}
.ai-send:not(:disabled):hover {
    background: #111827;
    transform: scale(1.05);
}

/* ============ Production Polish ============ */

/* Smooth modal overlay transitions */
#upload-modal,
#analytics-modal,
#media-modal {
    transition: opacity 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Loading shimmer for chat container */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
.loading-shimmer {
    background: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 12px;
}

/* Mobile: sidebar slide-in shadow */
@media (max-width: 768px) {
    #sidebar:not(.-translate-x-full) {
        box-shadow: 16px 0 48px -16px rgba(0, 0, 0, 0.2);
    }
}

/* Focus-visible ring for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #6366f1;
    outline-offset: 2px;
}

/* Pressed state for buttons */
.ai-sparkle-btn:active,
#open-sidebar-btn:active,
#close-sidebar-btn:active {
    transform: scale(0.92);
}

/* Prevent text selection on interactive elements */
button, [role="button"] {
    -webkit-user-select: none;
    user-select: none;
}

/* Hide scrollbar utility */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }