/* ============================================================
   Trading Fight — Intro Slideshow & Full-Screen Sections
   Bull vs Bear theme, swipeable full-screen slides
   Casino-tier addictive visual design
   ============================================================ */

/* ============================================================
   INTRO OVERLAY — Full-screen container
   ============================================================ */
.intro-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 8000;
    background: var(--color-bg);
    overflow: hidden;
}

.intro-overlay.intro-exit {
    animation: introExit 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes introExit {
    0%   { opacity: 1; transform: scale(1); }
    100% { opacity: 0; transform: scale(1.1); pointer-events: none; }
}

/* ============================================================
   SLIDES CONTAINER — Horizontal scroll snap
   ============================================================ */
.intro-slides {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.intro-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 2rem;
    user-select: none;
}

/* ============================================================
   SLIDE BACKGROUNDS — Full-screen thematic images
   ============================================================ */

/* Slide 1: PvP — Bull vs Bear Clash */
.intro-slide-pvp {
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(0, 255, 136, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(255, 51, 102, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, #060a12 0%, #0a0e17 30%, #0d1320 70%, #060a12 100%);
}

.intro-slide-pvp::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300ff88' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
    animation: bgScroll 30s linear infinite;
}

@keyframes bgScroll {
    0%   { background-position: 0 0; }
    100% { background-position: 60px 60px; }
}

/* Slide 2: vs IA */
.intro-slide-ia {
    background: 
        radial-gradient(ellipse at 50% 30%, rgba(139, 92, 246, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 70%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        linear-gradient(180deg, #060a12 0%, #0d0a1a 50%, #060a12 100%);
}

.intro-slide-ia::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        repeating-linear-gradient(0deg, transparent, transparent 49px, rgba(139, 92, 246, 0.05) 49px, rgba(139, 92, 246, 0.05) 50px),
        repeating-linear-gradient(90deg, transparent, transparent 49px, rgba(139, 92, 246, 0.05) 49px, rgba(139, 92, 246, 0.05) 50px);
    animation: gridPulse 4s ease-in-out infinite;
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.3; }
    50%      { opacity: 0.7; }
}

/* Slide 3: Battle Royale */
.intro-slide-br {
    background:
        radial-gradient(ellipse at 50% 50%, rgba(255, 107, 53, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(255, 51, 102, 0.15) 0%, transparent 40%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 215, 0, 0.1) 0%, transparent 40%),
        linear-gradient(180deg, #0a0604 0%, #120a06 50%, #0a0604 100%);
}

.intro-slide-br::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3z' fill='%23ff6b35' fill-opacity='0.04' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.5;
}

/* Slide 4: Clanes */
.intro-slide-clans {
    background:
        radial-gradient(ellipse at 50% 40%, rgba(255, 215, 0, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 30% 70%, rgba(0, 255, 136, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 70% 70%, rgba(0, 212, 255, 0.1) 0%, transparent 40%),
        linear-gradient(180deg, #060a12 0%, #0a100a 50%, #060a12 100%);
}

/* ============================================================
   BULL VS BEAR CLASH ANIMATION
   ============================================================ */
.clash-arena {
    position: relative;
    width: 100%;
    max-width: 500px;
    height: 220px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Bull character */
.bull-fighter {
    position: absolute;
    left: 5%;
    font-size: 5rem;
    animation: bullCharge 2.5s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.5));
    z-index: 2;
}

@keyframes bullCharge {
    0%, 100% { transform: translateX(0) scaleX(-1); }
    35%      { transform: translateX(60px) scaleX(-1) scale(1.1); }
    40%      { transform: translateX(65px) scaleX(-1) scale(1.15); }
    45%      { transform: translateX(55px) scaleX(-1) scale(1.05); }
    60%      { transform: translateX(0) scaleX(-1); }
}

/* Bear character */
.bear-fighter {
    position: absolute;
    right: 5%;
    font-size: 5rem;
    animation: bearCharge 2.5s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(255, 51, 102, 0.5));
    z-index: 2;
}

@keyframes bearCharge {
    0%, 100% { transform: translateX(0); }
    35%      { transform: translateX(-60px) scale(1.1); }
    40%      { transform: translateX(-65px) scale(1.15); }
    45%      { transform: translateX(-55px) scale(1.05); }
    60%      { transform: translateX(0); }
}

/* VS clash effect */
.clash-vs {
    position: relative;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clash-vs-text {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    color: #fff;
    text-shadow: 
        0 0 30px rgba(255, 215, 0, 0.8),
        0 0 60px rgba(255, 215, 0, 0.4),
        0 0 100px rgba(255, 215, 0, 0.2);
    animation: vsClash 2.5s ease-in-out infinite;
    letter-spacing: 4px;
}

@keyframes vsClash {
    0%, 60%, 100% { transform: scale(1); opacity: 0.8; }
    38%  { transform: scale(0.9); opacity: 0.6; }
    42%  { transform: scale(1.4); opacity: 1; text-shadow: 0 0 50px rgba(255, 215, 0, 1), 0 0 100px rgba(255, 215, 0, 0.8); }
    50%  { transform: scale(1.1); opacity: 1; }
}

/* Clash impact sparks */
.clash-sparks {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    pointer-events: none;
    z-index: 1;
}

.spark {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    animation: sparkBurst 2.5s ease-out infinite;
}

@keyframes sparkBurst {
    0%, 35% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    40%     { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    100%    { transform: translate(var(--sx), var(--sy)) scale(0); opacity: 0; }
}

.spark:nth-child(1)  { --sx: -80px; --sy: -60px; background: #FFD700; animation-delay: 0s; }
.spark:nth-child(2)  { --sx: 70px; --sy: -50px; background: #FF6B6B; animation-delay: 0.05s; }
.spark:nth-child(3)  { --sx: -40px; --sy: 70px; background: #00FF88; animation-delay: 0.1s; }
.spark:nth-child(4)  { --sx: 60px; --sy: 60px; background: #00D4FF; animation-delay: 0.15s; }
.spark:nth-child(5)  { --sx: -90px; --sy: 10px; background: #FFD700; animation-delay: 0.08s; }
.spark:nth-child(6)  { --sx: 80px; --sy: -20px; background: #FF3366; animation-delay: 0.12s; }
.spark:nth-child(7)  { --sx: -30px; --sy: -80px; background: #8B5CF6; animation-delay: 0.06s; }
.spark:nth-child(8)  { --sx: 50px; --sy: 80px; background: #00FF88; animation-delay: 0.18s; }
.spark:nth-child(9)  { --sx: -70px; --sy: 40px; background: #FFD700; animation-delay: 0.03s; }
.spark:nth-child(10) { --sx: 40px; --sy: -70px; background: #FF6B6B; animation-delay: 0.14s; }
.spark:nth-child(11) { --sx: 90px; --sy: 30px; background: #00D4FF; animation-delay: 0.09s; }
.spark:nth-child(12) { --sx: -50px; --sy: -40px; background: #8B5CF6; animation-delay: 0.16s; }

/* Energy ring around clash */
.clash-ring {
    position: absolute;
    top: 50%; left: 50%;
    width: 120px; height: 120px;
    border: 2px solid rgba(255, 215, 0, 0.4);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    animation: clashRing 2.5s ease-out infinite;
}

@keyframes clashRing {
    0%, 35% { transform: translate(-50%, -50%) scale(0); opacity: 0; border-color: rgba(255, 215, 0, 0.6); }
    42%     { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    100%    { transform: translate(-50%, -50%) scale(3); opacity: 0; }
}

.clash-ring:nth-child(2) {
    animation-delay: 0.15s;
    border-color: rgba(0, 212, 255, 0.3);
}

/* ============================================================
   SLIDE CONTENT
   ============================================================ */
.slide-content {
    position: relative;
    z-index: 5;
    text-align: center;
    max-width: 600px;
}

.slide-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    backdrop-filter: blur(4px);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: var(--font-mono);
}

.slide-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.slide-title .text-gradient-green {
    background: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-title .text-gradient-red {
    background: linear-gradient(135deg, #ff3366 0%, #ff6b35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-title .text-gradient-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #00d4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-title .text-gradient-gold {
    background: linear-gradient(135deg, #ffd700 0%, #ff6b35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-title .text-gradient-fire {
    background: linear-gradient(135deg, #ff6b35 0%, #ff3366 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.slide-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2.5rem;
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 1px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
}

.slide-cta-primary {
    background: linear-gradient(135deg, var(--color-green-dim), var(--color-green));
    color: #000;
    box-shadow: 0 0 30px var(--color-green-glow), 0 4px 15px rgba(0, 0, 0, 0.3);
}
.slide-cta-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 0 50px var(--color-green-glow), 0 8px 25px rgba(0, 0, 0, 0.4);
}

.slide-cta-purple {
    background: linear-gradient(135deg, #6d28d9, #8b5cf6);
    color: #fff;
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.3), 0 4px 15px rgba(0, 0, 0, 0.3);
}

.slide-cta-fire {
    background: linear-gradient(135deg, #dc2626, #ff6b35);
    color: #fff;
    box-shadow: 0 0 30px rgba(255, 107, 53, 0.3), 0 4px 15px rgba(0, 0, 0, 0.3);
}

.slide-cta-gold {
    background: linear-gradient(135deg, #b8860b, #ffd700);
    color: #000;
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.3), 0 4px 15px rgba(0, 0, 0, 0.3);
}

.slide-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.15) 50%, transparent 60%);
    animation: btnShine 3s ease-in-out infinite;
}

@keyframes btnShine {
    0%   { transform: translateX(-100%) rotate(45deg); }
    30%  { transform: translateX(100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

/* ============================================================
   SLIDE FEATURE ICONS — Big thematic display
   ============================================================ */
.slide-icon-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.slide-feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 1.5rem;
    transition: transform 0.3s;
}

.slide-feature-icon:hover {
    transform: scale(1.1);
}

.sfi-green {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.2);
    color: var(--color-green);
}
.sfi-red {
    background: rgba(255, 51, 102, 0.1);
    border: 1px solid rgba(255, 51, 102, 0.2);
    color: var(--color-red);
}
.sfi-purple {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: #8b5cf6;
}
.sfi-gold {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.2);
    color: #ffd700;
}
.sfi-accent {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--color-accent);
}

/* ============================================================
   IA SLIDE — Robot/Brain animation
   ============================================================ */
.ia-brain {
    position: relative;
    font-size: 6rem;
    margin-bottom: 1.5rem;
    animation: iaBrain 3s ease-in-out infinite;
}

@keyframes iaBrain {
    0%, 100% { transform: scale(1) rotate(0deg); filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.5)); }
    25%      { transform: scale(1.05) rotate(2deg); }
    50%      { transform: scale(1.1) rotate(0deg); filter: drop-shadow(0 0 40px rgba(139, 92, 246, 0.8)); }
    75%      { transform: scale(1.05) rotate(-2deg); }
}

.ia-circuit-lines {
    position: absolute;
    top: 50%; left: 50%;
    width: 200px; height: 200px;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.circuit-line {
    position: absolute;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.4), transparent);
    height: 1px;
    animation: circuitFlow 2s linear infinite;
}

.circuit-line:nth-child(1) { width: 100px; top: 20%; left: -30px; animation-delay: 0s; }
.circuit-line:nth-child(2) { width: 80px; top: 40%; right: -20px; animation-delay: 0.5s; }
.circuit-line:nth-child(3) { width: 120px; top: 60%; left: -40px; animation-delay: 1s; }
.circuit-line:nth-child(4) { width: 90px; top: 80%; right: -25px; animation-delay: 1.5s; }

@keyframes circuitFlow {
    0%   { opacity: 0; transform: scaleX(0); }
    50%  { opacity: 1; transform: scaleX(1); }
    100% { opacity: 0; transform: scaleX(0); }
}

/* ============================================================
   BATTLE ROYALE SLIDE — Fire & Crown
   ============================================================ */
.br-crown {
    position: relative;
    font-size: 6rem;
    margin-bottom: 1.5rem;
    animation: brCrown 2s ease-in-out infinite;
}

@keyframes brCrown {
    0%, 100% { transform: translateY(0); filter: drop-shadow(0 0 20px rgba(255, 107, 53, 0.5)); }
    50%      { transform: translateY(-10px); filter: drop-shadow(0 0 40px rgba(255, 107, 53, 0.8)); }
}

/* Fire particles */
.fire-particles {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 80px;
    pointer-events: none;
}

.fire-particle {
    position: absolute;
    bottom: 0;
    border-radius: 50%;
    animation: fireRise 1.5s ease-out infinite;
}

@keyframes fireRise {
    0%   { transform: translateY(0) scale(1); opacity: 1; }
    100% { transform: translateY(-80px) scale(0); opacity: 0; }
}

.fire-particle:nth-child(1) { left: 20%; width: 8px; height: 8px; background: #ff6b35; animation-delay: 0s; }
.fire-particle:nth-child(2) { left: 40%; width: 6px; height: 6px; background: #ffd700; animation-delay: 0.3s; }
.fire-particle:nth-child(3) { left: 60%; width: 10px; height: 10px; background: #ff3366; animation-delay: 0.6s; }
.fire-particle:nth-child(4) { left: 80%; width: 5px; height: 5px; background: #ff6b35; animation-delay: 0.9s; }
.fire-particle:nth-child(5) { left: 50%; width: 7px; height: 7px; background: #ffd700; animation-delay: 0.15s; }

/* ============================================================
   CLANS SLIDE — Shield animation
   ============================================================ */
.clans-shield {
    position: relative;
    font-size: 6rem;
    margin-bottom: 1.5rem;
    animation: clanShield 3s ease-in-out infinite;
}

@keyframes clanShield {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.4)); }
    50%      { transform: scale(1.08); filter: drop-shadow(0 0 30px rgba(255, 215, 0, 0.7)); }
}

/* ============================================================
   SLIDE NAVIGATION DOTS
   ============================================================ */
.intro-dots {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 8100;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 20px;
    backdrop-filter: blur(8px);
}

.intro-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.intro-dot.active {
    background: var(--color-green);
    border-color: var(--color-green);
    box-shadow: 0 0 10px var(--color-green-glow);
    transform: scale(1.3);
}

.intro-dot:hover:not(.active) {
    background: rgba(255, 255, 255, 0.4);
}

/* Dot labels */
.intro-dot-labels {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    z-index: 8100;
}

.intro-dot-label {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.3);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: color 0.3s;
    text-align: center;
    min-width: 50px;
}

.intro-dot-label.active {
    color: var(--color-green);
}

/* ============================================================
   SWIPE HINT — Animated arrow
   ============================================================ */
.swipe-hint {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 8100;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.8rem;
    font-family: var(--font-body);
    animation: swipeHint 2s ease-in-out infinite;
}

@keyframes swipeHint {
    0%, 100% { transform: translateX(-50%); opacity: 0.5; }
    50%      { transform: translateX(calc(-50% + 10px)); opacity: 1; }
}

.swipe-hint i {
    font-size: 1rem;
    animation: arrowBounce 1.5s ease-in-out infinite;
}

@keyframes arrowBounce {
    0%, 100% { transform: translateX(0); }
    50%      { transform: translateX(8px); }
}

/* ============================================================
   INTRO HEADER — Minimal top bar
   ============================================================ */
.intro-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 8200;
    background: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, transparent 100%);
}

.intro-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.intro-logo-icon {
    font-size: 1.5rem;
}

.intro-logo-text {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 1px;
}

.intro-sound-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.intro-sound-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.intro-sound-btn.muted {
    opacity: 0.5;
}

/* ============================================================
   PARTICLE BACKGROUND — Floating dots
   ============================================================ */
.particles-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    animation: particleFloat linear infinite;
    opacity: 0.3;
}

@keyframes particleFloat {
    0%   { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10%  { opacity: 0.3; }
    90%  { opacity: 0.3; }
    100% { transform: translateY(-10vh) rotate(360deg); opacity: 0; }
}

/* Generate particles with varied sizes and positions */
.particle:nth-child(1)  { left: 5%;  width: 3px; height: 3px; background: var(--color-green); animation-duration: 12s; animation-delay: 0s; }
.particle:nth-child(2)  { left: 15%; width: 2px; height: 2px; background: var(--color-accent); animation-duration: 15s; animation-delay: 2s; }
.particle:nth-child(3)  { left: 25%; width: 4px; height: 4px; background: var(--color-red); animation-duration: 10s; animation-delay: 1s; }
.particle:nth-child(4)  { left: 35%; width: 2px; height: 2px; background: var(--color-green); animation-duration: 18s; animation-delay: 3s; }
.particle:nth-child(5)  { left: 45%; width: 3px; height: 3px; background: #8b5cf6; animation-duration: 14s; animation-delay: 0.5s; }
.particle:nth-child(6)  { left: 55%; width: 2px; height: 2px; background: var(--color-accent); animation-duration: 16s; animation-delay: 4s; }
.particle:nth-child(7)  { left: 65%; width: 3px; height: 3px; background: #ffd700; animation-duration: 11s; animation-delay: 1.5s; }
.particle:nth-child(8)  { left: 75%; width: 4px; height: 4px; background: var(--color-green); animation-duration: 13s; animation-delay: 2.5s; }
.particle:nth-child(9)  { left: 85%; width: 2px; height: 2px; background: var(--color-red); animation-duration: 17s; animation-delay: 3.5s; }
.particle:nth-child(10) { left: 95%; width: 3px; height: 3px; background: var(--color-accent); animation-duration: 14s; animation-delay: 1s; }
.particle:nth-child(11) { left: 10%; width: 2px; height: 2px; background: #ffd700; animation-duration: 19s; animation-delay: 5s; }
.particle:nth-child(12) { left: 30%; width: 3px; height: 3px; background: #8b5cf6; animation-duration: 12s; animation-delay: 6s; }
.particle:nth-child(13) { left: 50%; width: 2px; height: 2px; background: var(--color-green); animation-duration: 16s; animation-delay: 7s; }
.particle:nth-child(14) { left: 70%; width: 4px; height: 4px; background: var(--color-red); animation-duration: 13s; animation-delay: 4.5s; }
.particle:nth-child(15) { left: 90%; width: 2px; height: 2px; background: #ffd700; animation-duration: 15s; animation-delay: 2s; }

/* ============================================================
   SLIDE STATS — Bottom feature cards
   ============================================================ */
.slide-stats {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.slide-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: 0.8rem 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    min-width: 100px;
    backdrop-filter: blur(4px);
}

.slide-stat-icon {
    font-size: 1.3rem;
}

.slide-stat-value {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}

.slide-stat-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .slide-title {
        font-size: 2rem;
    }
    .slide-description {
        font-size: 0.95rem;
    }
    .clash-arena {
        height: 160px;
        max-width: 350px;
    }
    .bull-fighter,
    .bear-fighter {
        font-size: 3.5rem;
    }
    .clash-vs-text {
        font-size: 2.5rem;
    }
    .ia-brain,
    .br-crown,
    .clans-shield {
        font-size: 4rem;
    }
    .slide-cta {
        padding: 0.8rem 2rem;
        font-size: 0.95rem;
    }
    .slide-stats {
        gap: 0.5rem;
    }
    .slide-stat {
        padding: 0.5rem 0.8rem;
        min-width: 80px;
    }
    .intro-slide {
        padding: 1rem;
        padding-top: 70px;
    }
}

@media (max-width: 480px) {
    .slide-title {
        font-size: 1.6rem;
    }
    .clash-arena {
        height: 130px;
        max-width: 300px;
    }
    .bull-fighter,
    .bear-fighter {
        font-size: 2.8rem;
    }
    .clash-vs-text {
        font-size: 2rem;
    }
}