/* ========================================
   SS Integrated Tech Solutions - Premium Design System v2
   ======================================== */

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.4);
    --secondary: #8b5cf6;
    --secondary-light: #a78bfa;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --gradient-accent: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --text-white: #ffffff;
    --text-muted: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-soft: #f1f5f9;
    --bg-dark: #0f172a;
    --bg-card: #ffffff;
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --shadow-glow: 0 0 40px rgba(59,130,246,0.15);
    --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-card-hover: 0 20px 40px rgba(0,0,0,0.12);
    --font-primary: 'Inter','Poppins',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    --font-display: 'Poppins','Inter',-apple-system,BlinkMacSystemFont,sans-serif;
    --spacing-xs: 0.5rem; --spacing-sm: 1rem; --spacing-md: 1.5rem;
    --spacing-lg: 2rem; --spacing-xl: 3rem; --spacing-2xl: 4rem; --spacing-3xl: 6rem;
    --radius-sm: 0.5rem; --radius-md: 0.75rem; --radius-lg: 1rem;
    --radius-xl: 1.5rem; --radius-2xl: 2rem; --radius-full: 9999px;
    --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
    --transition-base: 300ms cubic-bezier(0.4,0,0.2,1);
    --transition-slow: 500ms cubic-bezier(0.4,0,0.2,1);
    --transition-bounce: 500ms cubic-bezier(0.68,-0.55,0.265,1.55);
}

/* Reset */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-primary);font-size:1rem;line-height:1.7;color:var(--text-medium);background:var(--bg-white);overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:color var(--transition-base)}
ul{list-style:none}
.container{max-width:1280px;margin:0 auto;padding:0 var(--spacing-lg)}
section{padding:var(--spacing-3xl) 0;position:relative}

/* Typography */
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.2;color:var(--text-dark);letter-spacing:-0.02em}
h1{font-size:clamp(2.5rem,5vw,4rem)} h2{font-size:clamp(2rem,4vw,3rem)}
h3{font-size:clamp(1.25rem,2vw,1.5rem)} h4{font-size:1.125rem}
p{margin-bottom:var(--spacing-sm);color:var(--text-medium)}

/* ========================================
   Preloader
   ======================================== */
.preloader{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--primary);z-index:99999;display:flex;align-items:center;justify-content:center;transition:opacity 0.5s,visibility 0.5s}
.preloader.hidden{opacity:0;visibility:hidden}
.preloader-inner{position:relative;width:120px;height:120px;display:flex;align-items:center;justify-content:center}
.preloader-logo{width:50px;height:50px;object-fit:contain;animation:pulse 1.5s ease-in-out infinite;position:absolute}
.preloader-ring{position:absolute;width:100%;height:100%;border:3px solid transparent;border-radius:50%;animation:preloaderSpin 1.5s linear infinite}
.preloader-ring:nth-child(1){border-top-color:var(--accent);animation-duration:1.5s}
.preloader-ring:nth-child(2){width:90%;height:90%;border-right-color:var(--secondary);animation-duration:2s;animation-direction:reverse}
.preloader-ring:nth-child(3){width:80%;height:80%;border-bottom-color:#ff6b35;animation-duration:2.5s}
@keyframes preloaderSpin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:0.7}}

/* ========================================
   Section Headers
   ======================================== */
.section-header{text-align:center;margin-bottom:var(--spacing-2xl);position:relative;display:flex;flex-direction:column;align-items:center}
.section-eyebrow{display:inline-block;font-size:0.85rem;font-weight:700;text-transform:uppercase;letter-spacing:0.15em;color:var(--accent);margin-bottom:var(--spacing-sm);padding:0.4rem 1.2rem;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(139,92,246,0.1));border-radius:var(--radius-full);border:1px solid rgba(59,130,246,0.2)}
.section-title{font-size:clamp(2rem,4vw,2.75rem);font-weight:800;color:var(--text-dark);margin-bottom:var(--spacing-md);position:relative;display:block;text-align:center}
.section-title::after{content:'';display:block;width:60px;height:4px;background:var(--gradient-primary);border-radius:var(--radius-full);margin:10px auto 0}
.section-subtitle{font-size:1.125rem;color:var(--text-light);max-width:600px;margin:var(--spacing-sm) auto 0;line-height:1.7;text-align:center}

/* ========================================
   Buttons
   ======================================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:1rem 2rem;font-family:var(--font-primary);font-size:1rem;font-weight:600;border-radius:var(--radius-lg);transition:all var(--transition-base);cursor:pointer;border:none;position:relative;overflow:hidden}
.btn::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);transition:left 0.5s ease}
.btn:hover::before{left:100%}
.btn-primary{background:var(--gradient-primary);color:var(--text-white);box-shadow:0 4px 15px rgba(59,130,246,0.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(59,130,246,0.5)}
.btn-full{width:100%}

/* ========================================
   Navigation
   ======================================== */
.navbar{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,0.2);z-index:1000;transition:all var(--transition-base)}
.navbar.scrolled{background:rgba(255,255,255,0.95);box-shadow:var(--shadow-lg)}
.nav-wrapper{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 0;height:80px}
.logo{display:flex;align-items:center;gap:1rem}
.logo-img{height:50px;width:auto;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1))}
.logo h1{font-size:1.25rem;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-0.02em}
.nav-menu{display:flex;align-items:center;gap:var(--spacing-lg)}
.nav-link{font-weight:500;color:var(--text-medium);position:relative;padding:0.5rem 0;transition:color var(--transition-base)}
.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gradient-primary);transition:width var(--transition-base);border-radius:var(--radius-full)}
.nav-link:hover{color:var(--accent)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--accent)}
.nav-link.active::after{width:100%}
.nav-btn{padding:0.75rem 1.5rem;background:var(--gradient-primary);color:var(--text-white);border-radius:var(--radius-lg);font-weight:600;transition:all var(--transition-base);box-shadow:0 4px 15px rgba(59,130,246,0.3)}
.nav-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(59,130,246,0.4)}
.mobile-menu-toggle{display:none;flex-direction:column;background:none;border:none;cursor:pointer;padding:0.5rem;gap:5px}
.mobile-menu-toggle span{width:28px;height:3px;background:var(--text-dark);border-radius:var(--radius-full);transition:all var(--transition-base)}

/* ========================================
   Hero Slider
   ======================================== */
.hero-slider{position:relative;width:100%;height:100vh;min-height:500px;max-height:100vh;margin-top:80px;overflow:hidden;background:#0a0f2e}
.hero-particles{position:absolute;top:0;left:0;width:100%;height:100%;z-index:2;pointer-events:none}
.hero-slider .slide{position:absolute;top:0;left:0;width:100%;height:100%;background-size:cover;background-position:center;background-repeat:no-repeat;opacity:0;transition:opacity 1.2s ease-in-out;transform:scale(1.05)}
.hero-slider .slide.active{opacity:1;z-index:1;animation:kenBurns 8s ease-in-out forwards}
@keyframes kenBurns{0%{transform:scale(1.05)}100%{transform:scale(1)}}
.slide-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,rgba(10,15,46,0.85) 0%,rgba(10,15,46,0.6) 40%,rgba(10,15,46,0.3) 70%,rgba(10,15,46,0.1) 100%);z-index:1}
.slide-content{position:absolute;top:50%;left:5%;transform:translateY(-50%);z-index:5;max-width:50%;color:white;text-shadow:0 2px 10px rgba(0,0,0,0.3)}
.slide-badge{display:inline-block;padding:0.5rem 1.2rem;background:rgba(255,107,53,0.2);border:1px solid rgba(255,107,53,0.4);border-radius:var(--radius-full);font-size:0.85rem;font-weight:600;color:#ff8c5a;margin-bottom:1rem;backdrop-filter:blur(10px)}
.slide-title{font-size:clamp(1.8rem,4vw,3.5rem);font-weight:800;color:#fff;margin-bottom:0.5rem;line-height:1.15;letter-spacing:-0.02em}
.slide-subtitle{font-size:clamp(1rem,2vw,1.5rem);font-weight:600;color:#ff6b35;margin-bottom:1.5rem}
.slide-features{list-style:none;padding:0;margin:0 0 1.5rem 0}
.slide-features li{font-size:clamp(0.9rem,1.5vw,1.1rem);font-weight:500;padding:0.3rem 0;color:#ffffff}
.slide-features.two-col{display:flex;gap:2rem}
.feature-col{list-style:none;padding:0;margin:0}
.feature-col li{font-size:clamp(0.85rem,1.3vw,1rem);font-weight:500;padding:0.25rem 0;color:#fff}
.slide-buttons{display:flex;gap:1rem;margin-bottom:1rem}
.btn-enroll{display:inline-flex;align-items:center;gap:0.5rem;padding:0.85rem 1.8rem;background:linear-gradient(135deg,#ff6b35,#ff8c5a);color:#fff;font-weight:600;font-size:0.95rem;border-radius:var(--radius-lg);transition:all 0.3s ease;box-shadow:0 4px 20px rgba(255,107,53,0.4)}
.btn-enroll:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(255,107,53,0.5)}
.btn-contact{display:inline-block;padding:0.85rem 1.8rem;background:rgba(255,255,255,0.1);color:#fff;font-weight:600;font-size:0.95rem;border:2px solid rgba(255,255,255,0.3);border-radius:var(--radius-lg);transition:all 0.3s ease;backdrop-filter:blur(10px)}
.btn-contact:hover{background:rgba(255,255,255,0.2);transform:translateY(-3px)}
.slide-tagline{font-size:clamp(0.8rem,1.2vw,0.95rem);color:#ff6b35;font-weight:500;margin:0}

/* Slider Controls */
.hero-slider .nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,0.1);color:white;font-size:24px;width:50px;height:50px;border-radius:50%;cursor:pointer;z-index:10;display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,0.2);transition:all 0.3s ease;backdrop-filter:blur(5px)}
.hero-slider .nav:hover{background:rgba(255,255,255,0.3);transform:translateY(-50%) scale(1.1)}
.hero-slider .nav.prev{left:20px}
.hero-slider .nav.next{right:20px}
.slide-indicators{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:10;display:flex;gap:12px}
.indicator{width:40px;height:4px;border:none;border-radius:var(--radius-full);background:rgba(255,255,255,0.3);cursor:pointer;transition:all 0.3s ease;padding:0}
.indicator.active{background:#ff6b35;width:60px}
.indicator:hover{background:rgba(255,255,255,0.6)}

/* Slide Animations */
.animate-slide-up{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease,transform 0.6s ease}
.slide.active .animate-slide-up{opacity:1;transform:translateY(0)}
.slide.active .delay-1{transition-delay:0.2s}
.slide.active .delay-2{transition-delay:0.4s}
.slide.active .delay-3{transition-delay:0.6s}
.slide.active .delay-4{transition-delay:0.8s}
.slide.active .delay-5{transition-delay:1s}

/* ========================================
   Stats Section
   ======================================== */
.stats-section{background:var(--gradient-dark);padding:var(--spacing-2xl) 0;position:relative;overflow:hidden}
.stats-section::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(59,130,246,0.15),transparent 50%),radial-gradient(circle at 80% 50%,rgba(139,92,246,0.15),transparent 50%);pointer-events:none}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg);position:relative;z-index:1}
.stat-card{text-align:center;padding:var(--spacing-lg);border-radius:var(--radius-xl);background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.08);backdrop-filter:blur(10px);transition:all var(--transition-base)}
.stat-card:hover{background:rgba(255,255,255,0.1);transform:translateY(-5px)}
.stat-icon{font-size:2.5rem;margin-bottom:var(--spacing-sm)}
.stat-number{font-size:clamp(2.5rem,4vw,3.5rem);font-weight:900;font-family:var(--font-display);background:var(--gradient-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:inline}
.stat-suffix{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--accent-light);display:inline}
.stat-label{color:rgba(255,255,255,0.7);font-size:0.95rem;font-weight:500;margin:0.5rem 0 0}

/* ========================================
   About Section
   ======================================== */
.about{background:var(--bg-white);position:relative}
.about::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border-light),transparent)}
.about-content{max-width:1100px;margin:0 auto}
.about-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:var(--spacing-lg)}
.feature-item{display:flex;gap:var(--spacing-md);padding:var(--spacing-lg);background:var(--bg-card);border-radius:var(--radius-xl);transition:all var(--transition-base);border:1px solid var(--border-light);position:relative;overflow:hidden}
.feature-item::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-base);z-index:0}
.feature-item:hover{transform:translateY(-8px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.feature-item:hover::before{opacity:0.03}
.feature-icon{font-size:2.5rem;flex-shrink:0;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:var(--bg-soft);border-radius:var(--radius-lg);position:relative;z-index:1}
.feature-content{position:relative;z-index:1}
.feature-content h3{color:var(--text-dark);margin-bottom:var(--spacing-xs);font-size:1.125rem;font-weight:700}
.feature-content p{color:var(--text-light);margin:0;font-size:0.95rem;line-height:1.6}

/* ========================================
   Academic Section
   ======================================== */
.academic{background:var(--bg-soft);position:relative}
.academic::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 0% 0%,rgba(59,130,246,0.03),transparent 50%),radial-gradient(circle at 100% 100%,rgba(139,92,246,0.03),transparent 50%);pointer-events:none}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--spacing-lg);position:relative;z-index:1}
.service-card{background:var(--bg-card);padding:var(--spacing-xl);border-radius:var(--radius-xl);text-align:center;transition:all var(--transition-base);border:1px solid var(--border-light);position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);transform:scaleX(0);transition:transform var(--transition-base)}
.service-card:hover::before{transform:scaleX(1)}
.service-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.service-icon{font-size:3rem;margin-bottom:var(--spacing-md);display:flex;align-items:center;justify-content:center;width:80px;height:80px;margin-left:auto;margin-right:auto;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(139,92,246,0.1));border-radius:var(--radius-xl)}
.service-card h3{color:var(--text-dark);margin-bottom:var(--spacing-sm);font-size:1.25rem;font-weight:700}
.service-card p{color:var(--text-light);margin:0;line-height:1.7}
.card-link-arrow{display:inline-block;margin-top:0.75rem;color:var(--accent);font-weight:600;font-size:0.9rem;transition:transform 0.2s}
.service-card:hover .card-link-arrow{transform:translateX(5px)}

/* ========================================
   Why Choose Us
   ======================================== */
.why-choose-us{background:var(--bg-white);position:relative}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:var(--spacing-lg)}
.why-card{padding:var(--spacing-xl);border-radius:var(--radius-xl);background:var(--bg-card);border:1px solid var(--border-light);transition:all var(--transition-base);position:relative;overflow:hidden}
.why-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--gradient-primary);transform:scaleY(0);transition:transform var(--transition-base);transform-origin:top}
.why-card:hover::before{transform:scaleY(1)}
.why-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.why-number{font-size:3rem;font-weight:900;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;opacity:0.15;line-height:1;margin-bottom:0.5rem}
.why-card h3{font-size:1.25rem;font-weight:700;margin-bottom:var(--spacing-sm)}
.why-card p{color:var(--text-light);margin:0;line-height:1.7}

/* ========================================
   Industry Section
   ======================================== */
.industry{background:var(--bg-soft)}
.industry-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:var(--spacing-lg)}
.industry-card{background:var(--bg-card);padding:var(--spacing-xl);border-radius:var(--radius-xl);border:1px solid var(--border-light);transition:all var(--transition-base);position:relative;overflow:hidden}
.industry-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--gradient-primary);transform:scaleY(0);transition:transform var(--transition-base);transform-origin:top}
.industry-card:hover::before{transform:scaleY(1)}
.industry-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.card-header{display:flex;align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-md)}
.industry-icon{font-size:2.5rem;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(139,92,246,0.1));border-radius:var(--radius-lg)}
.card-header h3{color:var(--text-dark);margin:0;font-size:1.25rem;font-weight:700}
.industry-card>p{color:var(--text-light);margin-bottom:var(--spacing-md);line-height:1.7}
.feature-list{padding-left:0}
.feature-list li{padding:var(--spacing-xs) 0;color:var(--text-medium);position:relative;padding-left:1.75rem;font-size:0.95rem}
.feature-list li::before{content:'✓';position:absolute;left:0;color:var(--accent);font-weight:700;font-size:0.9rem}

/* ========================================
   Students Section
   ======================================== */
.students{background:var(--bg-white);position:relative}
.students-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--spacing-lg);position:relative;z-index:1}
.student-card{background:var(--bg-card);padding:var(--spacing-xl);border-radius:var(--radius-xl);position:relative;overflow:hidden;transition:all var(--transition-base);border:1px solid var(--border-light)}
.student-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.card-number{font-size:3.5rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;opacity:0.15;line-height:1;margin-bottom:var(--spacing-sm)}
.student-card h3{color:var(--text-dark);margin-bottom:var(--spacing-sm);font-size:1.25rem;font-weight:700;position:relative;z-index:1}
.student-card p{color:var(--text-light);margin-bottom:var(--spacing-md);position:relative;z-index:1;line-height:1.7}
.card-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-xs);position:relative;z-index:1}
.tag{padding:0.375rem 0.875rem;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(139,92,246,0.1));color:var(--accent);border-radius:var(--radius-full);font-size:0.8rem;font-weight:600;border:1px solid rgba(59,130,246,0.2);transition:all var(--transition-base)}
.student-card:hover .tag{background:var(--gradient-primary);color:var(--text-white);border-color:transparent}

/* ========================================
   Testimonials
   ======================================== */
.testimonials{background:var(--bg-soft);position:relative}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:var(--spacing-lg)}
.testimonial-card{background:var(--bg-card);padding:var(--spacing-xl);border-radius:var(--radius-2xl);border:1px solid var(--border-light);transition:all var(--transition-base);position:relative}
.testimonial-card::before{content:'"';position:absolute;top:15px;right:25px;font-size:5rem;font-family:Georgia,serif;color:rgba(59,130,246,0.08);line-height:1}
.testimonial-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-card-hover);border-color:transparent}
.testimonial-stars{color:#f59e0b;font-size:1.1rem;margin-bottom:var(--spacing-md);letter-spacing:2px}
.testimonial-text{color:var(--text-medium);font-size:1rem;line-height:1.8;font-style:italic;margin-bottom:var(--spacing-lg)}
.testimonial-author{display:flex;align-items:center;gap:var(--spacing-md)}
.author-avatar{width:50px;height:50px;border-radius:50%;background:var(--gradient-primary);color:var(--text-white);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;flex-shrink:0}
.author-info h4{color:var(--text-dark);margin-bottom:0.25rem;font-size:1rem}
.author-info p{color:var(--text-light);font-size:0.85rem;margin:0}

/* ========================================
   Instructors Section
   ======================================== */
.instructors{background:var(--bg-white)}
.instructors-content{max-width:1100px;margin:0 auto}
.highlight-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-2xl)}
.highlight-card{background:var(--gradient-dark);color:var(--text-white);padding:var(--spacing-xl);border-radius:var(--radius-xl);text-align:center;transition:all var(--transition-base);position:relative;overflow:hidden}
.highlight-card::before{content:'';position:absolute;inset:0;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-base)}
.highlight-card:hover::before{opacity:1}
.highlight-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-2xl)}
.highlight-icon{font-size:3rem;margin-bottom:var(--spacing-md);position:relative;z-index:1}
.highlight-card h3{color:var(--text-white);margin-bottom:var(--spacing-sm);font-size:1.25rem;font-weight:700;position:relative;z-index:1}
.highlight-card p{color:rgba(255,255,255,0.8);margin:0;position:relative;z-index:1;line-height:1.6}
.instructor-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--spacing-lg)}
.feature-box{padding:var(--spacing-lg);background:var(--bg-soft);border-radius:var(--radius-xl);border-left:4px solid var(--accent);transition:all var(--transition-base)}
.feature-box:hover{background:var(--bg-card);box-shadow:var(--shadow-card);transform:translateX(8px)}
.feature-box h4{color:var(--text-dark);margin-bottom:var(--spacing-sm);font-size:1.125rem;font-weight:700}
.feature-box p{color:var(--text-light);margin:0;line-height:1.7}

/* ========================================
   Management Section
   ======================================== */
.management{background:var(--bg-soft)}
.management-content{max-width:800px;margin:0 auto}
.manager-card{background:var(--bg-card);padding:var(--spacing-2xl);border-radius:var(--radius-2xl);display:flex;gap:var(--spacing-xl);align-items:center;box-shadow:var(--shadow-card);transition:all var(--transition-base);border:1px solid var(--border-light)}
.manager-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-5px);border-color:transparent}
.manager-avatar{flex-shrink:0}
.avatar-placeholder{width:120px;height:120px;border-radius:50%;background:var(--gradient-primary);color:var(--text-white);display:flex;align-items:center;justify-content:center;font-size:2.5rem;font-weight:700;box-shadow:0 10px 30px rgba(59,130,246,0.3)}
.manager-info h3{color:var(--text-dark);margin-bottom:var(--spacing-xs);font-size:1.5rem;font-weight:700}
.manager-title{color:var(--accent);font-weight:600;font-size:1rem;margin-bottom:var(--spacing-sm)!important}
.manager-description{color:var(--text-light);line-height:1.8;margin:0!important}

/* ========================================
   Contact Section
   ======================================== */
.contact{background:var(--bg-white);position:relative}
.contact::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border-light),transparent)}
.contact-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-2xl);margin-bottom:var(--spacing-2xl)}
.contact-info{display:flex;flex-direction:column;gap:var(--spacing-lg)}
.info-card{background:var(--bg-soft);padding:var(--spacing-lg);border-radius:var(--radius-xl);transition:all var(--transition-base);border:1px solid transparent}
.info-card:hover{background:var(--bg-card);border-color:var(--border-light);box-shadow:var(--shadow-card);transform:translateX(8px)}
.info-icon{font-size:2rem;margin-bottom:var(--spacing-sm);display:flex;align-items:center;justify-content:center;width:50px;height:50px;background:linear-gradient(135deg,rgba(59,130,246,0.1),rgba(139,92,246,0.1));border-radius:var(--radius-lg)}
.info-card h3{color:var(--text-dark);margin-bottom:var(--spacing-sm);font-size:1.125rem;font-weight:700}
.info-card p{color:var(--text-medium);margin-bottom:var(--spacing-xs);line-height:1.6}
.info-card p:last-child{margin-bottom:0}
.info-card a{color:var(--accent);font-weight:500;transition:color var(--transition-base)}
.info-card a:hover{color:var(--secondary)}
.info-note{color:var(--text-light)!important;font-size:0.875rem}
.map-link{display:inline-flex;align-items:center;gap:0.5rem;margin-top:var(--spacing-sm);color:var(--accent)!important;font-weight:600;font-size:0.95rem}
.contact-form-wrapper{background:var(--bg-card);padding:var(--spacing-xl);border-radius:var(--radius-2xl);box-shadow:var(--shadow-card);border:1px solid var(--border-light)}
.contact-form h3{color:var(--text-dark);margin-bottom:var(--spacing-lg);font-size:1.5rem;font-weight:700;text-align:center}
.form-group{margin-bottom:var(--spacing-md)}
.form-group label{display:block;margin-bottom:var(--spacing-xs);color:var(--text-dark);font-weight:600;font-size:0.95rem}
.form-group input,.form-group textarea{width:100%;padding:1rem 1.25rem;border:2px solid var(--border-light);border-radius:var(--radius-lg);font-family:var(--font-primary);font-size:1rem;color:var(--text-dark);background:var(--bg-white);transition:all var(--transition-base)}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(59,130,246,0.1)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-muted)}
.form-group textarea{resize:vertical;min-height:120px}
.map-container{border-radius:var(--radius-2xl);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--border-light)}
.map-container iframe{display:block}

/* ========================================
   Footer
   ======================================== */
.footer{background:var(--gradient-dark);color:var(--text-white);padding:var(--spacing-3xl) 0 var(--spacing-lg);position:relative}
.footer::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 80%,rgba(59,130,246,0.1),transparent 40%),radial-gradient(circle at 80% 20%,rgba(139,92,246,0.1),transparent 40%);pointer-events:none}
.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--spacing-2xl);margin-bottom:var(--spacing-2xl);position:relative;z-index:1}
.footer-section h3{color:var(--text-white);font-size:1.5rem;margin-bottom:var(--spacing-sm);font-weight:700}
.footer-tagline{background:var(--gradient-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:600;font-size:1.125rem;margin-bottom:var(--spacing-sm)!important}
.footer-section h4{color:var(--text-white);font-size:1.125rem;margin-bottom:var(--spacing-md);font-weight:700}
.footer-section p{color:rgba(255,255,255,0.7);margin-bottom:var(--spacing-xs)}
.footer-social{display:flex;gap:var(--spacing-sm);margin-top:var(--spacing-md)}
.social-link{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.1);border-radius:var(--radius-lg);font-size:1.1rem;transition:all var(--transition-base)}
.social-link:hover{background:var(--gradient-primary);transform:translateY(-3px)}
.footer-links{display:flex;flex-direction:column;gap:var(--spacing-sm)}
.footer-links a{color:rgba(255,255,255,0.7);transition:all var(--transition-base);font-weight:500}
.footer-links a:hover{color:var(--accent-light);transform:translateX(5px)}
.footer-contact{display:flex;flex-direction:column;gap:var(--spacing-sm)}
.footer-contact li{color:rgba(255,255,255,0.7);font-size:0.95rem;display:flex;align-items:flex-start;gap:var(--spacing-xs)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:var(--spacing-lg);text-align:center;position:relative;z-index:1}
.footer-bottom p{color:rgba(255,255,255,0.5);font-size:0.9rem;margin:0}

/* ========================================
   WhatsApp & Back to Top
   ======================================== */
.whatsapp-float{position:fixed;bottom:90px;right:25px;width:60px;height:60px;background:#25d366;border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;z-index:999;box-shadow:0 4px 20px rgba(37,211,102,0.4);transition:all 0.3s ease;animation:whatsappPulse 2s infinite}
.whatsapp-float:hover{transform:scale(1.1);box-shadow:0 6px 30px rgba(37,211,102,0.5)}
@keyframes whatsappPulse{0%,100%{box-shadow:0 4px 20px rgba(37,211,102,0.4)}50%{box-shadow:0 4px 30px rgba(37,211,102,0.6),0 0 0 10px rgba(37,211,102,0.1)}}
.back-to-top{position:fixed;bottom:25px;right:25px;width:50px;height:50px;background:var(--gradient-primary);border:none;border-radius:50%;color:white;cursor:pointer;z-index:999;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(20px);transition:all 0.3s ease;box-shadow:0 4px 15px rgba(59,130,246,0.4)}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 25px rgba(59,130,246,0.5)}

/* ========================================
   Scroll Animations
   ======================================== */
.animate-on-scroll{opacity:0;transform:translateY(30px);transition:all 0.6s ease-out}
.animate-on-scroll.visible{opacity:1;transform:translateY(0)}

/* ========================================
   Research Papers Slider
   ======================================== */
.research-papers{background:linear-gradient(135deg,#0a0f2e,#1a1f4e);padding:80px 0}
.papers-slider-wrapper{position:relative;display:flex;align-items:center;gap:20px;margin-top:40px}
.papers-slider{flex:1;overflow:hidden;border-radius:16px}
.papers-track{display:flex;transition:transform 0.5s ease-in-out}
.paper-slide{min-width:100%;display:flex;gap:40px;background:rgba(255,255,255,0.05);border-radius:16px;padding:30px;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.1);box-sizing:border-box}
.paper-front-page{flex:0 0 280px;position:relative;border-radius:12px;overflow:hidden;box-shadow:0 10px 40px rgba(0,0,0,0.4);cursor:pointer}
.paper-front-page .pdf-thumbnail{width:100%;height:380px;object-fit:cover;background:#fff;display:block}
.paper-hover-overlay{position:absolute;inset:0;background:rgba(0,0,0,0.7);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;opacity:0;transition:opacity 0.3s ease;color:white;font-weight:600}
.paper-front-page:hover .paper-hover-overlay{opacity:1}
.paper-hover-overlay .view-icon{font-size:2.5rem}
.paper-details{flex:1;display:flex;flex-direction:column;justify-content:center;color:white}
.paper-title{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:#fff;margin-bottom:10px;line-height:1.3}
.paper-authors{font-size:1rem;color:#ff6b35;font-weight:500;margin-bottom:20px}
.paper-abstract{font-size:1rem;color:rgba(255,255,255,0.8);line-height:1.7;margin-bottom:20px}
.paper-tags{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:25px}
.paper-tag{background:rgba(255,107,53,0.2);color:#ff6b35;padding:6px 14px;border-radius:20px;font-size:0.85rem;font-weight:500}
.read-paper-btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,#ff6b35,#ff8c5a);color:white;border:none;padding:14px 28px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all 0.3s ease;width:fit-content;box-shadow:0 4px 20px rgba(255,107,53,0.4)}
.read-paper-btn:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(255,107,53,0.5)}
.papers-nav{background:rgba(255,255,255,0.1);border:2px solid rgba(255,255,255,0.3);color:white;width:50px;height:50px;border-radius:50%;font-size:1.5rem;cursor:pointer;transition:all 0.3s ease;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.papers-nav:hover{background:#ff6b35;border-color:#ff6b35;transform:scale(1.1)}
.papers-dots{display:flex;justify-content:center;gap:12px;margin-top:30px}
.papers-dot{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,0.3);cursor:pointer;transition:all 0.3s ease}
.papers-dot.active{background:#ff6b35;transform:scale(1.2)}

/* ========================================
   PDF Modal
   ======================================== */
.pdf-modal{position:fixed;inset:0;background:rgba(15,23,42,0.95);backdrop-filter:blur(10px);z-index:10000;display:none;align-items:center;justify-content:center;padding:var(--spacing-md)}
.pdf-modal.active{display:flex}
.pdf-modal-content{width:100%;max-width:1000px;max-height:95vh;background:var(--bg-card);border-radius:var(--radius-2xl);overflow:hidden;display:flex;flex-direction:column;animation:slideUp 0.4s cubic-bezier(0.16,1,0.3,1);box-shadow:var(--shadow-2xl)}
@keyframes slideUp{from{opacity:0;transform:translateY(50px) scale(0.95)}to{opacity:1;transform:translateY(0) scale(1)}}
.pdf-modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md) var(--spacing-lg);background:var(--gradient-dark);color:var(--text-white);flex-wrap:wrap;gap:var(--spacing-md)}
.pdf-modal-header h3{color:var(--text-white);font-size:1.125rem;font-weight:600;margin:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pdf-controls{display:flex;align-items:center;gap:var(--spacing-sm);flex-wrap:wrap}
.pdf-nav-btn,.pdf-zoom-btn{padding:0.5rem 1rem;background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);color:var(--text-white);border-radius:var(--radius-md);font-size:0.875rem;font-weight:600;cursor:pointer;transition:all var(--transition-base)}
.pdf-nav-btn:hover,.pdf-zoom-btn:hover{background:rgba(255,255,255,0.2)}
.pdf-nav-btn:disabled{opacity:0.5;cursor:not-allowed}
.pdf-page-info,.pdf-zoom-info{color:rgba(255,255,255,0.8);font-size:0.875rem;min-width:100px;text-align:center}
.pdf-download-btn{padding:0.5rem 1rem;background:var(--gradient-primary);color:var(--text-white);border-radius:var(--radius-md);font-size:0.875rem;font-weight:600;cursor:pointer;transition:all var(--transition-base);text-decoration:none;display:inline-flex;align-items:center;gap:0.25rem}
.pdf-download-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(59,130,246,0.4)}
.pdf-close-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(239,68,68,0.2);border:1px solid rgba(239,68,68,0.3);color:#ef4444;border-radius:var(--radius-md);font-size:1.25rem;cursor:pointer;transition:all var(--transition-base)}
.pdf-close-btn:hover{background:#ef4444;color:var(--text-white)}
.pdf-modal-body{flex:1;overflow:auto;background:var(--bg-soft);display:flex;align-items:flex-start;justify-content:center;padding:var(--spacing-lg)}
.pdf-modal-body canvas{max-width:100%;height:auto;box-shadow:var(--shadow-xl);border-radius:var(--radius-sm);background:white}
.pdf-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;color:var(--text-light);padding:3rem}
.pdf-loading-spinner{width:50px;height:50px;border:4px solid var(--border-light);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ========================================
   Custom Scrollbar & Selection
   ======================================== */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg-soft)}
::-webkit-scrollbar-thumb{background:var(--gradient-primary);border-radius:var(--radius-full)}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}
::selection{background:rgba(59,130,246,0.2);color:var(--text-dark)}

/* ========================================
   Responsive Design
   ======================================== */
@media(max-width:1024px){
    .container{padding:0 var(--spacing-md)}
    section{padding:var(--spacing-2xl) 0}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .footer-content{grid-template-columns:1fr 1fr}
}

@media(max-width:768px){
    html{font-size:15px}
    .nav-wrapper{height:70px}
    .logo h1{font-size:1rem}
    .logo-img{height:40px}
    .nav-menu{position:fixed;top:70px;left:0;right:0;background:var(--bg-white);flex-direction:column;padding:var(--spacing-lg);gap:var(--spacing-md);box-shadow:var(--shadow-xl);transform:translateY(-100%);opacity:0;visibility:hidden;transition:all var(--transition-base)}
    .nav-menu.active{transform:translateY(0);opacity:1;visibility:visible}
    .mobile-menu-toggle{display:flex}
    .mobile-menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(6px,6px)}
    .mobile-menu-toggle.active span:nth-child(2){opacity:0}
    .mobile-menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}
    .hero-slider{margin-top:70px;height:85vh}
    .slide-content{left:3%;max-width:65%}
    .slide-title{font-size:1.5rem}
    .slide-subtitle{font-size:0.95rem;margin-bottom:1rem}
    .slide-features.two-col{flex-direction:column;gap:0}
    .slide-buttons{flex-direction:column;gap:0.5rem}
    .btn-enroll,.btn-contact{padding:0.6rem 1.2rem;font-size:0.85rem}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .about-features,.services-grid,.industry-grid,.students-grid,.highlight-grid,.instructor-features,.testimonials-grid,.why-grid{grid-template-columns:1fr}
    .feature-item{flex-direction:column;text-align:center}
    .feature-icon{margin:0 auto var(--spacing-md)}
    .contact-wrapper{grid-template-columns:1fr}
    .manager-card{flex-direction:column;text-align:center;padding:var(--spacing-xl)}
    .avatar-placeholder{width:100px;height:100px;font-size:2rem}
    .footer-content{grid-template-columns:1fr;text-align:center}
    .footer-links,.footer-contact{align-items:center}
    .footer-social{justify-content:center}
    .papers-slider-wrapper{flex-direction:column}
    .papers-nav{display:none}
    .paper-slide{flex-direction:column;align-items:center;text-align:center;padding:20px;gap:25px}
    .paper-front-page{flex:0 0 auto;width:220px}
    .paper-details{align-items:center}
    .paper-tags{justify-content:center}
    .pdf-modal-header{flex-direction:column;align-items:flex-start}
    .pdf-controls{width:100%;justify-content:center}
    .hero-slider .nav{width:40px;height:40px;font-size:18px}
    .hero-slider .nav.prev{left:10px}
    .hero-slider .nav.next{right:10px}
}

@media(max-width:480px){
    html{font-size:14px}
    .container{padding:0 var(--spacing-sm)}
    section{padding:var(--spacing-xl) 0}
    .section-title{font-size:1.75rem}
    .hero-slider{height:75vh}
    .slide-content{max-width:70%}
    .slide-title{font-size:1.2rem}
    .slide-subtitle{font-size:0.8rem}
    .slide-features li,.feature-col li{font-size:0.75rem;padding:0.15rem 0}
    .slide-badge{font-size:0.75rem;padding:0.3rem 0.8rem}
    .stats-grid{grid-template-columns:1fr 1fr;gap:var(--spacing-sm)}
    .stat-number{font-size:2rem}
    .whatsapp-float{width:50px;height:50px;bottom:80px;right:15px}
    .back-to-top{width:42px;height:42px;bottom:20px;right:15px}
}