/* Base & Variables */
:root {
    --mouse-x: 50%;
    --mouse-y: 50%;
    --scroll-velocity: 0;
}

body {
    background-color: #020617;
    color: #E2E8F0;
    cursor: none;
}

/* Responsive Custom Cursor */
@media (hover: none) and (pointer: coarse) {
    body {
        cursor: auto;
    }

    #custom-cursor,
    #cursor-glow-field {
        display: none !important;
    }
}

#custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s cubic-bezier(0.16, 1, 0.3, 1), height 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s;
    mix-blend-mode: difference;
    will-change: transform;
}

#custom-cursor.interactive {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(2px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    mix-blend-mode: normal;
}

#cursor-glow-field {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle closest-side, rgba(34, 211, 238, 0.08), transparent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
    mix-blend-mode: screen;
    will-change: transform;
    transition: opacity 0.5s ease;
}

/* Background Grid */
.bg-grid-pattern {
    background-image:
        linear-gradient(to right, rgba(30, 41, 59, 0.1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(30, 41, 59, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
}

/* Cinematic Reveal & Stagger System */
.reveal-element {
    opacity: 0;
    transform: translateY(30px) scale(0.96);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.8s cubic-bezier(0.16, 1, 0.3, 1),
        filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    filter: blur(4px);
    will-change: opacity, transform, filter;
}

.reveal-element.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0px);
}

/* Depth & Focus System */
section {
    transition: opacity 0.8s ease, filter 0.8s ease;
    will-change: opacity, filter;
}

body.is-scrolling section:not(.focus-active) {
    opacity: 0.3;
    filter: blur(2px);
}

/* Reactive Cards (3D & Glow) */
.interactive-card {
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.1s ease, border-radius 0.3s ease;
    will-change: transform;
}

.interactive-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: radial-gradient(600px circle at var(--card-mouse-x, 0) var(--card-mouse-y, 0), rgba(255, 255, 255, 0.15), transparent 40%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.interactive-card:hover {
    border-radius: 1.5rem;
}

.interactive-card:hover::before {
    opacity: 1;
}

.card-inner {
    transition: transform 0.1s ease-out;
    will-change: transform;
}

/* Glass Panel */
.glass-panel {
    background: rgba(15, 23, 42, 0.3);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.03);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Micro-Interactions */
.btn-sweep {
    position: relative;
    overflow: hidden;
}

.btn-sweep::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-sweep:hover::after {
    left: 150%;
}

.link-underline {
    position: relative;
    display: inline-block;
}

.link-underline::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: currentColor;
    transition: width 0.3s ease-out;
}

.link-underline:hover::after {
    width: 100%;
}

.divider-line {
    width: 0;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.divider-line.active {
    width: 100%;
}

/* Form Inputs */
.input-wrapper {
    position: relative;
}

.input-wrapper input,
.input-wrapper textarea {
    background: transparent;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.input-wrapper input:hover,
.input-wrapper textarea:hover {
    border-bottom-color: rgba(34, 211, 238, 0.3);
    background: linear-gradient(to top, rgba(34, 211, 238, 0.02), transparent);
}

.input-wrapper input:focus,
.input-wrapper textarea:focus {
    outline: none;
    border-bottom-color: #22D3EE;
    box-shadow: 0 1px 0 0 #22D3EE;
    background: linear-gradient(to top, rgba(34, 211, 238, 0.05), transparent);
}

.input-wrapper label {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    color: #64748B;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.input-wrapper textarea~label {
    top: 1rem;
    transform: none;
}

.input-wrapper input:focus~label,
.input-wrapper input:not(:placeholder-shown)~label,
.input-wrapper textarea:focus~label,
.input-wrapper textarea:not(:placeholder-shown)~label {
    transform: translateY(-1.5rem) scale(0.85);
    transform-origin: left top;
    color: #22D3EE;
}

/* Form State Transitions */
.form-fade-out {
    opacity: 0;
    transform: scale(0.98);
    pointer-events: none;
    transition: all 0.4s ease;
}

.success-fade-in {
    opacity: 1 !important;
    transform: scale(1) !important;
    pointer-events: auto !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #020617;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    ::before,
    ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal-element {
        opacity: 1;
        transform: none;
        filter: none;
    }

    #custom-cursor,
    #cursor-glow-field {
        display: none;
    }

    body {
        cursor: auto;
    }

    .interactive-card {
        transform: none !important;
    }

    .card-inner {
        transform: none !important;
    }
}