html { 
    scroll-behavior: smooth; 
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

:root {
    --klar-primary: #5586D6;
    --klar-darker: #2c4a8a;
    --klar-light: #73a1e8;
    
    --background-dark: #121212;
    --background-light: #1E1E1E;
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --border-color: #4B5563;
    --header-bg: rgba(18, 18, 18, 0.7);
    --card-bg: rgba(30, 30, 30, 0.4);
    --modal-card-bg: #1F2937;
    --button-secondary-bg: #374151;
    --button-secondary-hover-bg: #4B5563;
    --button-secondary-text: #F9FAFB;
    --aurora-opacity: 0.1;
}

.bg-theme-dark { background-color: var(--background-dark); }
.bg-theme-light { background-color: var(--background-light); }
.bg-theme-header { background-color: var(--header-bg); }
.bg-theme-card { background-color: var(--card-bg); }
.bg-theme-modal-card { background-color: var(--modal-card-bg); }
.bg-theme-button-secondary { background-color: var(--button-secondary-bg); }
.hover\:bg-theme-button-secondary-hover:hover { background-color: var(--button-secondary-hover-bg); }

.text-theme-primary { color: var(--text-primary); }
.text-theme-secondary { color: var(--text-secondary); }
.text-theme-button-secondary-text { color: var(--text-secondary); }

input.text-theme-primary,
textarea.text-theme-primary {
    color: var(--text-primary) !important;
}

.placeholder-theme-secondary::placeholder { 
    color: var(--text-secondary);
    opacity: 1;
}

.border-theme { border-color: var(--border-color); }

.fill-theme-primary { fill: var(--text-primary); }
.stroke-theme-primary { stroke: var(--text-primary); }

.bg-klar { background-color: var(--klar-primary); }
.hover\:bg-klar-light:hover { background-color: var(--klar-light); }
.text-klar { color: var(--klar-primary); }
.border-klar { border-color: var(--klar-primary); }
.shadow-klar { box-shadow: 0 4px 14px 0 rgba(85, 134, 214, 0.3); }
.focus\:ring-klar:focus {
  --tw-ring-color: var(--klar-primary);
}

.nav-active {
    color: var(--klar-primary) !important;
    font-weight: 700;
}

.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.interactive-card {
    position: relative;
    transition: box-shadow 0.3s ease;
    transform-style: preserve-3d;
    will-change: transform;
}

.interactive-card.featured-card-js {
    transform: scale(1.1);
}

.interactive-card:hover { 
    box-shadow: 0 10px 30px rgba(0,0,0,0.2), 0 0 20px rgba(85, 134, 214, 0.2); 
}
.interactive-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), rgba(85, 134, 214, 0.15), transparent 40%) border-box;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.interactive-card:hover::before { opacity: 1; }

.faq-item { 
    transition: transform 0.3s ease, border-color 0.3s ease; 
}
.faq-item:hover {
    transform: scale(1.02);
    border-color: var(--klar-primary);
}

.slider-thumb {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.slider-thumb.dragging, .slider-thumb:active {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--klar-primary);
    cursor: grabbing;
}

.no-arrows::-webkit-inner-spin-button,
.no-arrows::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.no-arrows {
  -moz-appearance: textfield;
}

#preloader {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--background-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}
#preloader.loaded {
    opacity: 0;
    pointer-events: none;
}
.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.2);
    border-top-color: var(--klar-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.aurora-background {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
}
.aurora-spot {
    position: absolute;
    background-image: radial-gradient(circle, var(--klar-primary) 0%, transparent 60%);
    border-radius: 50%;
    filter: blur(100px);
    will-change: transform;
    pointer-events: none;
    transition: transform 0.5s ease-out;
    opacity: var(--aurora-opacity);
}

.action-button-wrapper {
    animation: button-pop-in 1s 1s forwards cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: scale(0.5);
}
.initial-tooltip {
    animation: tooltip-fade 7s 1.5s forwards ease-in-out;
    opacity: 0;
}

.perspective-1000 { perspective: 1000px; }
.transform-style-3d { transform-style: preserve-3d; }

@keyframes spin { 
    to { transform: rotate(360deg); } 
}

@keyframes button-pop-in { 
    to { opacity: 1; transform: scale(1); } 
}

@keyframes tooltip-fade {
    0% { opacity: 0; transform: translateY(0); }
    10% { opacity: 1; transform: translateY(-0.5rem); }
    80% { opacity: 1; transform: translateY(-0.5rem); }
    100% { opacity: 0; transform: translateY(0); }
}

@keyframes hub-content-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.hub-content-inner {
    animation: hub-content-fade-in 0.3s ease-out forwards;
}

.preview-animation-container {
    position: relative;
    width: 250px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.scanner-line {
    position: absolute;
    top: 0;
    left: -10%;
    width: 10px;
    height: 100%;
    background-color: var(--klar-primary);
    box-shadow: 0 0 15px 5px var(--klar-primary);
    filter: blur(2px);
    animation: scan 1.2s ease-in-out forwards;
}

@keyframes scan {
    0% {
        left: -10%;
    }
    50% {
        left: 110%;
        width: 40px;
    }
    100% {
        left: 110%;
        width: 10px;
    }
}