@import url('https://fonts.googleapis.com/css2?family=Amiri+Quran&family=Tajawal:wght@300;400;500;700&family=Orbitron:wght@400;500;700&display=swap');

:root {
    /* --- Dark Sci-Fi / Spiritual Tech Palette (Same great palette) --- */
    --bg-deep-space: #0A0F18;
    --bg-nebula-void: #101828;
    --bg-star-cluster: #18243C;
    --bg-overlay-glass: rgba(16, 24, 40, 0.75);

    --text-luminous: #E0E7FF;
    --text-celestial: #A0B0D0;
    --text-faded-echo: #607090;

    --accent-aurora-blue: #3E7BFF;
    --accent-aurora-blue-glow: rgba(62, 123, 255, 0.4);
    --accent-aurora-blue-hover: #6899FF;
    
    --accent-pulsar-green: #00DDAA;
    --accent-pulsar-green-glow: rgba(0, 221, 170, 0.35);
    --accent-pulsar-green-hover: #33E8C0;

    --accent-nova-orange: #FF8A00;
    --accent-nova-orange-glow: rgba(255, 138, 0, 0.3);

    --accent-error-red: #F44336;
    --accent-error-red-glow: rgba(244, 67, 54, 0.3);

    /* --- ENHANCED: Bubble Backgrounds for more depth --- */
    --user-bubble-bg: linear-gradient(145deg, var(--accent-aurora-blue), #2a5bb5);
    --quran-bubble-bg: linear-gradient(160deg, var(--bg-star-cluster), #141f35); /* Subtle gradient */
    --system-bubble-bg: rgba(200, 220, 255, 0.07);
    --system-bubble-error-bg: rgba(244, 67, 54, 0.12);

    --border-color-primary: #283858;
    --border-color-interactive: var(--accent-aurora-blue);

    /* --- ENHANCED: More pronounced shadows and glows --- */
    --shadow-soft-glow: 0 0 20px rgba(62, 123, 255, 0.15);
    --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-interactive-strong: 0 5px 20px rgba(0, 0, 0, 0.4);
    --shadow-user-bubble: 0 6px 20px var(--accent-aurora-blue-glow), var(--shadow-card);
    --shadow-pulse-green: 0 0 15px var(--accent-pulsar-green-glow);

    --font-quran: 'Amiri Quran', serif;
    --font-ui-primary: 'Tajawal', "Segoe UI", sans-serif;
    --font-ui-accent: 'Orbitron', sans-serif;
    --base-font-size: 16px;

    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
    --transition-swift: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* NEW: Bouncy transition */
}

/* --- Global Resets & Base Styles --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: var(--base-font-size);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-ui-primary);
    background-color: var(--bg-deep-space);
    color: var(--text-luminous);
    height: 100vh;
    max-height: 100svh; /* NEW: Use svh for better mobile viewport handling */
    overflow: hidden;
    direction: rtl;
    /* ENHANCED: More dynamic background */
    background-image: 
        radial-gradient(circle at 100% 0%, rgba(62, 123, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 0% 100%, rgba(0, 221, 170, 0.08) 0%, transparent 35%),
        url('https://www.transparenttextures.com/patterns/stardust.png'); /* Subtle texture */
    background-attachment: fixed;
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-nebula-void); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--accent-aurora-blue), var(--accent-pulsar-green)); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg, var(--accent-aurora-blue-hover), var(--accent-pulsar-green-hover)); box-shadow: 0 0 10px var(--accent-aurora-blue-glow); }

/* --- Main App Layout --- */
.app-container {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
}

/* --- Sidebar --- */
.sidebar {
    background-color: var(--bg-nebula-void);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 1000;
    transition: transform var(--transition-smooth), width var(--transition-smooth), box-shadow var(--transition-smooth);
    width: 280px;
    min-width: 260px;
    border-left: 1px solid var(--border-color-primary);
    position: relative;
    transform: translateX(0);
}

.sidebar-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color-primary);
}
.sidebar-header .logo {
    font-family: var(--font-ui-accent);
    font-size: clamp(1.8rem, 4vw, 2.3rem);
    font-weight: 700;
    color: var(--accent-aurora-blue);
    text-shadow: 0 0 10px var(--accent-aurora-blue-glow), 0 0 20px var(--accent-aurora-blue-glow), 0 0 2px #fff;
    cursor: default;
    letter-spacing: 1px;
}
.sidebar-header .logo span {
    font-family: var(--font-ui-primary);
    font-size: 0.4em;
    font-weight: 400;
    display: block;
    color: var(--text-celestial);
    letter-spacing: 2px;
    margin-top: -3px;
    text-transform: uppercase;
}

.sidebar nav ul { list-style: none; padding-right: 0; }
#sidebar-main-nav, #sidebar-other-nav, .recent-recitations-list { margin-bottom: 1rem; }

.sidebar nav ul li a, .recent-recitations-list li {
    display: flex;
    align-items: center;
    padding: 0.7rem 1rem;
    color: var(--text-celestial);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    margin-bottom: 0.25rem;
    transition: var(--transition-swift);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}
.sidebar nav ul li a .icon, .recent-recitations-list li .icon {
    margin-left: 0.75rem;
    font-size: 1.2em;
    width: 22px;
    text-align: center;
    transition: transform var(--transition-swift);
}

/* ENHANCED: More engaging hover and active states for sidebar links */
.sidebar nav ul li a:hover, .recent-recitations-list li:hover {
    background-color: rgba(62, 123, 255, 0.1);
    color: var(--text-luminous);
    border-color: rgba(62, 123, 255, 0.2);
    transform: translateX(-5px) scale(1.02);
    box-shadow: 0 0 15px var(--accent-aurora-blue-glow);
}
.sidebar nav ul li a:hover .icon, .recent-recitations-list li:hover .icon {
    transform: scale(1.15) rotate(-5deg);
}

.sidebar nav ul li a.active, .recent-recitations-list li.active {
    background: var(--accent-aurora-blue);
    color: var(--bg-deep-space);
    font-weight: 700;
    box-shadow: 0 4px 15px var(--accent-aurora-blue-glow);
    transform: translateX(-3px) scale(1.03);
}
.sidebar nav ul li a.active::before { /* Animated glow effect for active link */
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 3px; height: 100%;
    background: var(--accent-pulsar-green);
    box-shadow: 0 0 8px var(--accent-pulsar-green);
    animation: pulseGlow 2s infinite ease-in-out;
}
.sidebar nav ul li a.active .icon, .recent-recitations-list li.active .icon {
    color: var(--bg-deep-space);
    transform: scale(1.1) rotate(5deg);
}
.recent-recitations-list li { cursor: pointer; font-size: 0.85rem; }

@keyframes pulseGlow {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; box-shadow: 0 0 15px var(--accent-pulsar-green); }
}

/* ENHANCED: Khatma Progress with animated fill */
#khatma-progress-ui { padding: 1rem 0.25rem; border-top: 1px solid var(--border-color-primary); margin-top: 1rem; }
#khatma-progress-ui .khatma-title { font-size: 0.85em; color: var(--text-celestial); margin-bottom: 0.5rem; display: block; font-weight: 500; }
.progress-bar-container { width: 100%; height: 10px; background-color: var(--bg-star-cluster); border-radius: var(--border-radius-sm); overflow: hidden; border: 1px solid var(--border-color-primary); box-shadow: inset 0 1px 3px rgba(0,0,0,0.3); }
.progress-bar-fill {
    width: 0%; height: 100%;
    background: linear-gradient(90deg, var(--accent-pulsar-green), var(--accent-aurora-blue));
    border-radius: var(--border-radius-sm);
    transition: width 0.8s cubic-bezier(0.65, 0, 0.35, 1);
    box-shadow: 0 0 10px var(--accent-pulsar-green-glow), 0 0 5px var(--accent-aurora-blue-glow);
    position: relative;
    overflow: hidden;
}
.progress-bar-fill::after { /* Animated shine effect */
    content: '';
    position: absolute;
    top: 0; left: -50%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-25deg);
    animation: shine 3s infinite linear;
}
@keyframes shine { from { left: -50%; } to { left: 120%; } }
#khatma-progress-ui .progress-text { font-size: 0.8em; text-align: center; color: var(--text-luminous); margin-top: 0.5rem; font-weight: 500; }

/* --- Chat Interface --- */
.chat-interface {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-deep-space);
    position: relative;
    overflow: hidden;
    max-height: 100svh;
}

.chat-header {
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-overlay-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 60px;
    position: sticky; top: 0; z-index: 100;
    flex-shrink: 0;
}
.chat-header .app-title { font-size: clamp(1.1rem, 2.5vw, 1.25rem); font-weight: 500; color: var(--text-luminous); font-family: var(--font-ui-accent); letter-spacing: 0.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-left: 1rem; }
.chat-header .chat-tools { display: flex; gap: 0.5rem; }
.chat-header .chat-tools button {
    background: none; border: none; color: var(--text-celestial);
    font-size: clamp(1.4rem, 4vw, 1.7rem);
    cursor: pointer; padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition-bounce);
}
.chat-header .chat-tools button:hover {
    color: var(--accent-aurora-blue-hover);
    background-color: rgba(62, 123, 255, 0.1);
    transform: scale(1.15) rotate(10deg);
}

/* Message Area */
.message-area {
    flex-grow: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}
.message-bubble {
    max-width: 80%;
    padding: 0.8rem 1.2rem;
    border-radius: var(--border-radius-lg);
    line-height: 1.8;
    font-size: clamp(0.9rem, 2vw, 0.95rem);
    box-shadow: var(--shadow-card);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInBubble 0.5s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    position: relative;
    border: 1px solid transparent; /* Start with transparent border */
    word-wrap: break-word;
}
@keyframes fadeInBubble { to { opacity: 1; transform: translateY(0); } }

.message-bubble.user {
    background: var(--user-bubble-bg);
    color: #fff;
    align-self: flex-end; margin-left: auto;
    border-bottom-right-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-user-bubble);
    border-color: rgba(255, 255, 255, 0.1);
}
.message-bubble.quran {
    background: var(--quran-bubble-bg);
    color: var(--text-luminous);
    align-self: flex-start; margin-right: auto;
    border-bottom-left-radius: var(--border-radius-sm);
    border-color: var(--border-color-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05); /* Inner shadow for depth */
}
.message-bubble.system, .message-bubble.tafsir { /* NEW: Grouping system and tafsir */
    background-color: var(--system-bubble-bg);
    border: 1px dashed var(--border-color-primary);
    color: var(--text-celestial);
    align-self: center; max-width: 90%; text-align: right; /* Ensure RTL for content */
    font-size: clamp(0.8rem, 1.8vw, 0.9rem);
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius-md);
    box-shadow: none;
}
.message-bubble.system.error {
    background-color: var(--system-bubble-error-bg);
    border-style: solid;
    border-color: var(--accent-error-red);
    color: var(--accent-error-red);
    text-shadow: 0 0 5px var(--accent-error-red-glow);
}

.message-bubble.quran .ayah-text {
    font-family: var(--font-quran);
    font-size: clamp(1.6em, 4.5vw, 2.1em);
    margin-bottom: 0.5rem; line-height: 2.4;
    cursor: pointer; transition: color 0.2s ease;
    color: var(--text-luminous);
}
.message-bubble.quran .ayah-text .ayah-number-symbol {
    font-family: var(--font-ui-primary);
    font-size: 0.5em;
    color: var(--accent-pulsar-green);
    margin: 0 0.25rem;
    text-shadow: var(--shadow-pulse-green);
    user-select: none;
}
.message-bubble.quran .ayah-text:hover { color: var(--accent-pulsar-green-hover); }
.message-bubble.quran .ayah-text .highlight {
    background-color: rgba(0, 221, 170, 0.2);
    color: var(--accent-pulsar-green-hover);
    padding: 2px 4px; border-radius: 4px;
    box-shadow: 0 0 8px var(--accent-pulsar-green-glow);
}
.message-bubble.quran .surah-info {
    font-size: 0.75em; color: var(--text-celestial); text-align: left;
    display: block; margin-top: 0.5rem; opacity: 0.7; font-weight: 300;
}
.message-bubble.quran .bismillah {
    font-family: var(--font-quran);
    font-size: clamp(1.4em, 3.8vw, 1.8em);
    text-align: center;
    margin-bottom: 1rem; display: block; padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color-primary);
    color: var(--accent-nova-orange);
    text-shadow: 0 0 8px var(--accent-nova-orange-glow);
}

/* Ayah Tools (Quick & Static) */
.ayah-tools, .ayah-quick-tools {
    text-align: left;
    margin-top: 0.75rem; padding-top: 0.75rem;
    border-top: 1px solid rgba(224, 231, 255, 0.1);
    display: flex; gap: 0.5rem; flex-wrap: wrap;
    align-items: center;
}
.ayah-quick-tools { border-top: none; padding-top: 0; margin-top: 0.5rem; }
.tool-btn {
    background: rgba(224, 231, 255, 0.08);
    border: 1px solid var(--border-color-primary);
    color: var(--text-celestial);
    padding: 0.35rem 0.7rem;
    font-size: clamp(0.75rem, 1.8vw, 0.8rem);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-bounce);
    font-family: var(--font-ui-primary);
    display: inline-flex; align-items: center;
    gap: 0.35rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.tool-btn:hover {
    background: var(--accent-aurora-blue);
    color: var(--bg-deep-space);
    border-color: var(--accent-aurora-blue);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 4px 15px var(--accent-aurora-blue-glow);
}
.tool-btn .icon { font-size: 1.1em; }


/* Typing Indicator */
.loading-dots { display: flex; justify-content: center; align-items: center; padding: 0.25rem 0; }
.loading-dots span {
    display: inline-block; width: 8px; height: 8px; background-color: var(--accent-aurora-blue);
    border-radius: 50%; margin: 0 3px; animation: bounce 1.4s infinite ease-in-out both;
    box-shadow: 0 0 5px var(--accent-aurora-blue-glow);
}
.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }
@keyframes bounce { 0%, 80%, 100% { transform: scale(0); opacity: 0.5; } 40% { transform: scale(1.0); opacity: 1; } }


/* Input Area */
.input-area {
    display: flex;
    padding: 0.75rem 1rem;
    background-color: var(--bg-nebula-void);
    border-top: 1px solid var(--border-color-primary);
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-interactive-strong);
    flex-shrink: 0;
}
.input-area input[type="text"] {
    flex-grow: 1;
    min-width: 50px;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color-primary);
    background-color: var(--bg-star-cluster);
    color: var(--text-luminous);
    font-size: clamp(0.9rem, 2.2vw, 1rem);
    font-family: var(--font-ui-primary);
    transition: border-color var(--transition-swift), box-shadow var(--transition-swift);
}
.input-area input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-aurora-blue);
    box-shadow: 0 0 0 3px var(--accent-aurora-blue-glow), inset 0 1px 4px rgba(0,0,0,0.2);
}
.input-area input[type="text"]::placeholder { color: var(--text-faded-echo); opacity: 1; }

.input-area button {
    background: var(--accent-aurora-blue);
    color: var(--bg-deep-space);
    border: none;
    border-radius: 50%;
    width: clamp(42px, 8vw, 48px);
    height: clamp(42px, 8vw, 48px);
    font-size: clamp(1.4rem, 4vw, 1.7rem);
    cursor: pointer;
    display: flex; justify-content: center; align-items: center;
    transition: var(--transition-bounce);
    box-shadow: 0 3px 8px rgba(62, 123, 255, 0.3);
    flex-shrink: 0;
}
.input-area button:hover {
    background-color: var(--accent-aurora-blue-hover);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 15px rgba(62, 123, 255, 0.5);
}
.input-area button:active {
    transform: translateY(0px) scale(1);
    box-shadow: 0 2px 5px rgba(62, 123, 255, 0.3);
}
.input-area button#voice-input-btn { background: transparent; color: var(--text-celestial); box-shadow: none; }
.input-area button#voice-input-btn:hover { color: var(--accent-aurora-blue); background: rgba(62, 123, 255, 0.1); }


/* Zen Mode Overlay */
.zen-mode-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100svh;
    background: radial-gradient(ellipse at center, rgba(10, 15, 24, 0.9) 0%, var(--bg-deep-space) 75%),
                url('https://www.transparenttextures.com/patterns/stardust.png');
    background-size: auto, 300px 300px;
    animation: zenBackgroundAnimate 45s ease-in-out infinite, fadeInZen 0.8s var(--transition-smooth);
    z-index: 2000;
    display: none; flex-direction: column; justify-content: center; align-items: center;
    text-align: center; padding: 1.5rem; color: #fff;
    overflow-y: auto;
}
@keyframes zenBackgroundAnimate { 0%, 100% { background-position: 0% 50%, 0% 0%; } 50% { background-position: 100% 50%, 50% 50%; } }
@keyframes fadeInZen { from { opacity: 0; backdrop-filter: blur(0px); } to { opacity: 1; backdrop-filter: blur(5px); } }
@keyframes fadeInText { from { opacity:0; transform: translateY(15px); } to { opacity:1; transform: translateY(0px); } }

.zen-mode-overlay .zen-ayah {
    font-family: var(--font-quran);
    font-size: clamp(2.2rem, 7vw, 4.8rem);
    /* ENHANCED: More ethereal text glow */
    text-shadow: 0 0 5px var(--accent-aurora-blue-glow), 0 0 15px var(--accent-pulsar-green-glow), 0 0 40px rgba(62, 123, 255, 0.2), 0 0 2px #fff;
    margin-bottom: 1.5rem; line-height: 2.1; max-width: 950px;
    animation: fadeInText 1.3s ease-out forwards;
}
.zen-mode-overlay .zen-surah-info {
    color: var(--text-celestial);
    font-size: clamp(1rem, 3vw, 1.4rem);
    letter-spacing: 1px;
    font-family: var(--font-ui-accent);
    animation: fadeInText 1.3s ease-out 0.4s forwards;
    opacity: 0; /* Start hidden for animation */
}
.zen-mode-overlay .zen-close-btn {
    position: absolute; top: 1rem; left: 1rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.15);
    color: #fff; font-size: clamp(1.5rem, 4vw, 2rem);
    cursor: pointer;
    width: clamp(40px, 8vw, 48px); height: clamp(40px, 8vw, 48px);
    border-radius: 50%;
    display: flex; justify-content: center; align-items: center;
    transition: var(--transition-bounce);
    backdrop-filter: blur(5px);
}
.zen-mode-overlay .zen-close-btn:hover {
    background: rgba(244, 67, 54, 0.2);
    transform: rotate(180deg) scale(1.15);
    border-color: var(--accent-error-red);
}

.zen-nav-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255,255,255,0.15);
    color: white; font-size: clamp(1.5rem, 4vw, 2rem);
    cursor: pointer; border-radius: 50%;
    width: clamp(44px, 9vw, 52px); height: clamp(44px, 9vw, 52px);
    display: flex; justify-content: center; align-items: center;
    transition: var(--transition-bounce);
    backdrop-filter: blur(5px);
}
#zen-nav-prev { right: 1rem; }
#zen-nav-next { left: 1rem; }
.zen-nav-btn:hover {
    background: rgba(62, 123, 255, 0.15);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 0 10px rgba(255,255,255,0.2);
    border-color: var(--accent-aurora-blue);
}

/* Tafsir styles */
.message-bubble.tafsir .tafsir-header,
.message-bubble.system .tafsir-header {
    font-weight: 700;
    color: var(--accent-pulsar-green);
    margin-bottom: 0.5rem; padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(0, 221, 170, 0.2);
    font-size: 1em;
    text-align: right;
}
.message-bubble.tafsir .tafsir-text,
.message-bubble.system .tafsir-text {
    font-family: var(--font-ui-primary);
    font-size: 0.95em; line-height: 1.9;
    color: var(--text-luminous);
    white-space: pre-line;
    text-align: right;
}

/* Mobile Toggle Button for Sidebar */
.sidebar-toggle-btn {
    display: none;
    background: var(--bg-star-cluster);
    border: 1px solid var(--border-color-interactive);
    color: var(--accent-aurora-blue);
    font-size: 1.8rem; cursor: pointer;
    padding: 0.25rem 0.5rem;
    position: fixed;
    top: 10px; right: 1rem;
    z-index: 1001;
    border-radius: var(--border-radius-md);
    box-shadow: 0 3px 10px rgba(0,0,0,0.4);
    transition: var(--transition-bounce);
    line-height: 1;
}
.sidebar-toggle-btn:hover {
    background-color: var(--accent-aurora-blue);
    color: var(--bg-deep-space);
    box-shadow: 0 0 15px var(--accent-aurora-blue-glow);
    transform: rotate(15deg) scale(1.1);
}

/* --- Responsive Design Adjustments --- */
@media (max-width: 768px) {
    html { font-size: 15px; }

    .sidebar {
        position: fixed; top: 0; right: 0;
        height: 100%;
        width: min(280px, 75vw);
        min-width: 0;
        transform: translateX(100%);
        box-shadow: -5px 0 30px rgba(0,0,0,0.4);
        border-left: none;
        border-right: 1px solid var(--border-color-primary);
    }
    .sidebar.open { transform: translateX(0%); }
    .sidebar-toggle-btn { display: flex; align-items: center; justify-content: center; }

    .chat-header { padding: 0.75rem 1rem; }
    .message-area { padding: 1rem; gap: 1rem; }
    .message-bubble { max-width: 88%; }
    .input-area { padding: 0.5rem 0.75rem; }
}

@media (max-width: 520px) {
    html { font-size: 14px; }
    .sidebar { width: min(260px, 80vw); }
    .sidebar-toggle-btn { top: 8px; right: 0.75rem; font-size: 1.6rem; }
    .chat-header .app-title { display: none; }
    .message-area { padding: 0.75rem; }
    .message-bubble { max-width: 92%; padding: 0.6rem 1rem; }
    .message-bubble.quran .ayah-text { font-size: clamp(1.4em, 4.5vw, 1.8em); line-height: 2.3; }
    .input-area { gap: 0.5rem; }
    .tool-btn { font-size: clamp(0.7rem, 2vw, 0.75rem); padding: 0.3rem 0.6rem; }
    .zen-mode-overlay .zen-ayah { font-size: clamp(1.8rem, 6.5vw, 3rem); }
}

/* Global App Loading Overlay */
#app-loading-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100svh;
    background-color: rgba(10, 15, 24, 0.92);
    z-index: 9999;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    font-family: var(--font-ui-primary); color: var(--accent-aurora-blue);
    font-size: clamp(1.2rem, 3vw, 1.4rem);
    text-align: center;
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    transition: opacity 0.35s ease-in-out;
}