/* ==========================================================================
   TENKASIBROS - MAIN STYLESHEET (STYLE.CSS)
   ========================================================================== */

/* --------------------------------------------------------------------------
   01 BASE & RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-dark);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .brand-name, .hero-title {
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

a {
    transition: var(--transition-fast);
}

/* Color Utility Helpers */
.bg-dark-slate { background-color: var(--color-bg-dark) !important; }
.bg-surface { background-color: var(--color-surface-dark) !important; }
.text-primary-blue { color: var(--color-primary-blue) !important; }
.text-glow-blue { color: var(--color-glow-blue) !important; }
.text-accent-yellow { color: var(--color-accent-yellow) !important; }
.text-accent-green { color: var(--color-accent-green) !important; }
.text-accent-red { color: var(--color-accent-red) !important; }
.text-gray { color: var(--color-gray) !important; }
.bg-primary-blue { background-color: var(--color-primary-blue) !important; }
.bg-accent-yellow { background-color: var(--color-accent-yellow) !important; }
.bg-accent-green { background-color: var(--color-accent-green) !important; }
.bg-accent-red { background-color: var(--color-accent-red) !important; }

/* Gradient Utilities */
.text-gradient-primary {
    background: linear-gradient(135deg, var(--color-glow-blue) 0%, var(--color-primary-blue) 50%, var(--color-accent-yellow) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-gold {
    background: linear-gradient(135deg, #FFF 0%, var(--color-accent-yellow) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   02 GLASSMORPHISM & INNER GLOW COMPONENTS
   -------------------------------------------------------------------------- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--inner-glow-blue);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow-glow), inset 0 0 30px rgba(96, 165, 250, 0.25);
}

.border-y-glass {
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.border-top-glass {
    border-top: 1px solid var(--glass-border);
}

.border-bottom-glass {
    border-bottom: 1px solid var(--glass-border);
}

.border-glow-blue {
    border: 1px solid rgba(96, 165, 250, 0.4);
    box-shadow: 0 0 35px rgba(59, 130, 246, 0.25), var(--inner-glow-blue);
}

/* --------------------------------------------------------------------------
   03 BUTTONS & RIPPLE MICRO-INTERACTION
   -------------------------------------------------------------------------- */
.btn-glow-primary {
    background: linear-gradient(135deg, var(--color-primary-blue) 0%, var(--color-primary-blue-dark) 100%);
    color: var(--color-white);
    border: none;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.45);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 1;
    animation: buttonGlowPulse 4s infinite ease-in-out;
}

.btn-glow-primary:hover {
    color: var(--color-white);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.8), 0 0 40px rgba(96, 165, 250, 0.5);
    transform: translateY(-3px);
}

.btn-outline-glass {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--color-white);
    backdrop-filter: var(--glass-blur);
    font-weight: 600;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn-outline-glass:hover {
    background: rgba(96, 165, 250, 0.15);
    border-color: rgba(96, 165, 250, 0.5);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(96, 165, 250, 0.25);
}

/* Ripple Span */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.45);
    transform: scale(0);
    animation: rippleExpand 0.6s linear;
    pointer-events: none;
}

.btn-filter {
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--color-gray);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-pill);
    transition: var(--transition-fast);
}

.btn-filter.active, .btn-filter:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
    border-color: var(--color-primary-blue);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-icon-glass {
    width: 44px;
    height: 44px;
    background: rgba(17, 24, 39, 0.8);
    border: 1px solid var(--glass-border);
    color: var(--color-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.btn-icon-glass:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
    transform: scale(1.1);
}

/* --------------------------------------------------------------------------
   04 PRELOADER & SCROLL PROGRESS
   -------------------------------------------------------------------------- */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-bg-dark);
    z-index: var(--z-preloader);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#preloader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-logo {
    width: 95px;
    height: auto;
    animation: pulseLogo 2s infinite ease-in-out;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(59, 130, 246, 0.2);
    border-top-color: var(--color-primary-blue);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

.loader-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    animation: loaderTextPulse 5s ease-in-out infinite;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

@keyframes loaderTextPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.92;
        transform: scale(1.015);
    }
}

/* Preloader Letter Colors & Matching Soft Glows */
.loader-letter-t { color: #1E88E5; text-shadow: 0 0 8px rgba(30, 136, 229, 0.45); }
.loader-letter-e { color: #FDD835; text-shadow: 0 0 8px rgba(253, 216, 53, 0.45); }
.loader-letter-n { color: #E53935; text-shadow: 0 0 8px rgba(229, 57, 53, 0.45); }
.loader-letter-k { color: #43A047; text-shadow: 0 0 8px rgba(67, 160, 71, 0.45); }
.loader-letter-a { color: #FDD835; text-shadow: 0 0 8px rgba(253, 216, 53, 0.45); }
.loader-letter-s { color: #E53935; text-shadow: 0 0 8px rgba(229, 57, 53, 0.45); }
.loader-letter-i { color: #43A047; text-shadow: 0 0 8px rgba(67, 160, 71, 0.45); }
.loader-letter-b { color: #FDD835; text-shadow: 0 0 8px rgba(253, 216, 53, 0.45); }
.loader-letter-r { color: #1E88E5; text-shadow: 0 0 8px rgba(30, 136, 229, 0.45); }
.loader-letter-o { color: #43A047; text-shadow: 0 0 8px rgba(67, 160, 71, 0.45); }
.loader-letter-s2 { color: #1E88E5; text-shadow: 0 0 8px rgba(30, 136, 229, 0.45); }
.loader-letter-dot { color: #FFFFFF; text-shadow: 0 0 8px rgba(255, 255, 255, 0.5); }
.loader-letter-c { color: #E53935; text-shadow: 0 0 8px rgba(229, 57, 53, 0.45); }
.loader-letter-o2 { color: #43A047; text-shadow: 0 0 8px rgba(67, 160, 71, 0.45); }
.loader-letter-m { color: #FDD835; text-shadow: 0 0 8px rgba(253, 216, 53, 0.45); }

.loader-progress-bar {
    width: 160px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-pill);
    margin: 0 auto;
    overflow: hidden;
}

.loader-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-blue), var(--color-accent-yellow));
    animation: progressShift 2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary-blue), var(--color-glow-blue), var(--color-accent-yellow));
    z-index: 1001;
    width: 0%;
    transition: width 0.1s linear;
}

/* --------------------------------------------------------------------------
   05 STICKY GLASS NAVBAR & LOGO ELEVATION
   -------------------------------------------------------------------------- */
.header-area {
    padding: 1rem 0;
    transition: var(--transition-smooth);
}

.header-area.scrolled {
    padding: 0.5rem 0;
}

.glass-nav {
    background: var(--glass-nav-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    padding: 0.55rem 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Circular Logo Container with Glowing Ring & Ambient Aura */
.logo-container-elevated {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    padding: 4px;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4), inset 0 0 12px rgba(96, 165, 250, 0.25);
    transition: transform 0.3s ease;
}

.logo-container-elevated:hover {
    transform: scale(1.08);
}

/* Ambient Aura Behind Logo */
.logo-ambient-aura {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.6) 0%, rgba(59, 130, 246, 0.2) 60%, transparent 80%);
    animation: ambientGlowPulse 4s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

/* Animated Glowing Ring Around Logo */
.logo-glowing-ring {
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    padding: 2px;
    background: conic-gradient(from 0deg, #3B82F6, #60A5FA, #FACC15, #22C55E, #3B82F6);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: glowingRingRotate 6s linear infinite;
    pointer-events: none;
    z-index: 1;
}

/* Glass Reflection Shine Sweep */
.logo-glass-shine {
    position: absolute;
    top: -50%;
    left: -120%;
    width: 60%;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
    transform: rotate(25deg);
    animation: shineSweep 4.5s infinite ease-in-out;
    pointer-events: none;
    z-index: 3;
    border-radius: 50%;
}

/* Micro Floating Particles Around Logo */
.logo-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-glow-blue);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--color-glow-blue);
    pointer-events: none;
    z-index: 2;
    animation: particleFloat 3s infinite ease-in-out;
}

.particle-1 { top: -4px; left: 10px; animation-delay: 0s; }
.particle-2 { bottom: -4px; right: 12px; animation-delay: 1s; background: var(--color-accent-yellow); box-shadow: 0 0 6px var(--color-accent-yellow); }
.particle-3 { top: 12px; right: -4px; animation-delay: 1.8s; background: var(--color-accent-green); box-shadow: 0 0 6px var(--color-accent-green); }

/* Logo Image (Size Increased by 30%, Occupies 78-80% of Circle) */
.brand-logo-img {
    height: 44px;
    width: 44px;
    object-fit: contain;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 8px rgba(96, 165, 250, 0.5));
}

.brand-name-stacked {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 0.9;
    letter-spacing: 0.5px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: filter 0.3s ease, text-shadow 0.3s ease;
}

.brand-name-stacked:hover {
    filter: brightness(1.25);
    text-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
}

.brand-line {
    display: block;
    line-height: 0.9;
}

.brand-line.line-1 {
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

.brand-line.line-2 {
    font-size: 0.95rem;
    letter-spacing: 2.2px;
    text-align: center;
    margin-top: 2px;
}

.brand-tagline {
    font-size: 0.62rem;
    color: rgba(255, 255, 255, 0.75) !important;
    letter-spacing: 1px;
    text-uppercase: uppercase;
    text-align: center;
    margin-top: 3px;
}

/* Individual Brand Letter Colors */
.letter-t { color: #1E88E5; }
.letter-e { color: #FDD835; }
.letter-n { color: #E53935; }
.letter-k { color: #43A047; }
.letter-a { color: #FDD835; }
.letter-s { color: #E53935; }
.letter-i { color: #43A047; }
.letter-b { color: #FDD835; }
.letter-r { color: #1E88E5; }
.letter-o { color: #43A047; }
.letter-s2 { color: #1E88E5; }

.navbar-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--color-gray) !important;
    font-weight: 500;
    font-size: 0.925rem;
    padding: 0.5rem 0 !important;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-white) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-blue);
    transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.navbar-toggler {
    padding: 0.25rem 0.5rem;
}

.toggler-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    margin: 5px 0;
    transition: var(--transition-fast);
}

/* --------------------------------------------------------------------------
   06 HERO SECTION & RIGHT HERO CARD WITH 3D TILT
   -------------------------------------------------------------------------- */
.hero-section {
    min-height: 100vh;
    padding-top: 135px;
    padding-bottom: 90px;
    background: radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.18) 0%, transparent 45%),
                radial-gradient(circle at 85% 75%, rgba(250, 204, 21, 0.08) 0%, transparent 45%),
                var(--color-bg-dark);
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.45;
    z-index: var(--z-background);
}

.shape-1 {
    width: 450px;
    height: 450px;
    background: var(--color-primary-blue);
    top: 5%;
    left: -120px;
}

.shape-2 {
    width: 380px;
    height: 380px;
    background: var(--color-glow-blue);
    bottom: 5%;
    right: -60px;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 32px 32px;
    z-index: var(--z-background);
}

.hero-title {
    font-size: 3.35rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-white);
}

/* Right Hero Card - 3D Tilt, Inner Glow & Glassmorphism */
.hero-visual-wrapper {
    perspective: 1000px;
    position: relative;
}

.hero-laptop-mockup {
    position: relative;
    z-index: 2;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur-strong);
    -webkit-backdrop-filter: var(--glass-blur-strong);
    border: 1px solid rgba(96, 165, 250, 0.25);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), var(--inner-glow-blue);
    transform-style: preserve-3d;
    transition: transform 0.15s ease-out, box-shadow 0.3s ease, border-color 0.3s ease;
}

.hero-laptop-mockup:hover {
    border-color: rgba(96, 165, 250, 0.55);
    box-shadow: 0 30px 60px -10px rgba(59, 130, 246, 0.4), inset 0 0 35px rgba(96, 165, 250, 0.25);
}

/* Hero Circle Logo Spotlight inside Hero Visual */
.hero-logo-circle-spotlight {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: rgba(11, 19, 36, 0.9);
    margin: 0 auto 1.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.45), inset 0 0 20px rgba(96, 165, 250, 0.25);
}

.hero-spotlight-img {
    height: 115px;
    width: 115px;
    object-fit: contain;
    filter: drop-shadow(0 0 12px rgba(96, 165, 250, 0.6));
    z-index: 2;
}

.hero-main-img {
    background: var(--color-surface-dark);
    max-height: 280px;
    object-fit: contain;
    padding: 15px;
}

.floating-badge {
    position: absolute;
    z-index: 3;
    min-width: 195px;
    transform-style: preserve-3d;
}

.badge-1 { top: -20px; right: -20px; }
.badge-2 { bottom: -20px; left: -20px; }

.trust-divider {
    width: 1px;
    height: 35px;
    background: var(--glass-border);
}

/* --------------------------------------------------------------------------
   07 EVENTS & SPECIALIZED COMPONENTS
   -------------------------------------------------------------------------- */
.py-6 {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.max-w-700 { max-width: 700px; }
.max-w-600 { max-width: 600px; }
.max-w-900 { max-width: 900px; }

.btn-event-tab {
    background: transparent;
    border: none;
    color: var(--color-gray);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-pill);
    transition: var(--transition-smooth);
}

.btn-event-tab.active {
    background: var(--color-primary-blue);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.event-card {
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.event-card:hover {
    border-color: rgba(96, 165, 250, 0.5);
    box-shadow: 0 12px 35px -5px rgba(59, 130, 246, 0.3);
}

.event-img-wrapper {
    height: 220px;
    background: var(--color-surface-dark);
    overflow: hidden;
}

.event-banner-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 25px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.event-card:hover .event-banner-img {
    transform: scale(1.08);
}

.event-status-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-pill);
    letter-spacing: 0.5px;
    text-uppercase: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.badge-upcoming {
    background: var(--color-primary-blue);
    color: var(--color-white);
}

.badge-completed {
    background: var(--color-accent-green);
    color: var(--color-surface-dark);
}

.event-category-tag {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--color-gray);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-sm);
}

.event-countdown-box {
    background: rgba(15, 23, 42, 0.7) !important;
    border: 1px solid rgba(59, 130, 246, 0.3) !important;
}

.fs-8 { font-size: 0.75rem; }
.fs-9 { font-size: 0.65rem; }

.tag-chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--color-gray);
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   08 PORTFOLIO & SERVICES
   -------------------------------------------------------------------------- */
.portfolio-img-wrapper {
    height: 240px;
    background: var(--color-surface-dark);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 20px;
    transition: var(--transition-smooth);
}

.portfolio-card:hover .portfolio-img {
    transform: scale(1.08);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(7, 17, 31, 0.88);
    opacity: 0;
    transition: var(--transition-fast);
}

.portfolio-card:hover .portfolio-overlay { opacity: 1; }

.portfolio-item.hide { display: none; }

/* --------------------------------------------------------------------------
   09 ACCORDION & FAQS
   -------------------------------------------------------------------------- */
.custom-accordion .accordion-button {
    background: rgba(17, 24, 39, 0.7);
    color: var(--color-white);
    box-shadow: none;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
}

.custom-accordion .accordion-button:not(.collapsed) {
    background: rgba(59, 130, 246, 0.2);
    color: var(--color-white);
    border-bottom: 1px solid var(--glass-border);
}

.custom-accordion .accordion-button::after { filter: invert(1); }

.custom-accordion .accordion-body {
    background: rgba(7, 17, 31, 0.55);
    padding: 1.25rem 1.5rem;
}

/* --------------------------------------------------------------------------
   10 FOOTER & BACK TO TOP
   -------------------------------------------------------------------------- */
.footer-links a {
    color: var(--color-gray);
    text-decoration: none;
    padding: 0.35rem 0;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--color-primary-blue);
    transform: translateX(4px);
}

.social-btn {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray);
    text-decoration: none;
}

.social-btn:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
    transform: translateY(-3px);
}

.glass-input {
    background: rgba(17, 24, 39, 0.8) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--color-white) !important;
}

.glass-input:focus {
    border-color: var(--color-primary-blue) !important;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.3) !important;
}

.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.2rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.back-to-top-btn.show { opacity: 1; visibility: visible; }

.back-to-top-btn:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
    transform: translateY(-5px);
}