/* === Custom Properties === */
:root {
    --abyssal-slate: #1b1f24;
    --frost-wash: #e8ecf0;
    --glacial-blue: #5d7a8c;
    --mineral-gray: #7a8a96;
    --refraction: #a3c4d4;
    --deep-current: #141820;
}

/* === Reset === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--deep-current);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* === Typography === */
.wordmark {
    font-family: 'Archivo Black', sans-serif;
    font-weight: 400;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    line-height: 1;
    color: var(--frost-wash);
}

.panel__heading {
    font-family: 'Archivo Black', sans-serif;
    font-weight: 400;
    font-size: clamp(2rem, 6vw, 5rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.panel__text {
    font-family: 'Source Sans 3', sans-serif;
    font-weight: 300;
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    line-height: 1.75;
    letter-spacing: 0.02em;
    max-width: 38ch;
}

.panel__label {
    font-family: 'DM Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--mineral-gray);
    display: block;
    margin-bottom: 1.5rem;
}

/* === Panel Base === */
.panel {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
}

.panel__content {
    position: relative;
    z-index: 2;
    padding: 4rem;
}

/* === Dark Panels === */
.panel--dark {
    background: var(--abyssal-slate);
    color: var(--frost-wash);
}

.panel--dark .panel__heading {
    color: var(--frost-wash);
}

.panel--dark .panel__text {
    color: var(--frost-wash);
    opacity: 0.85;
}

/* === Light Panels === */
.panel--light {
    background: var(--frost-wash);
    color: var(--abyssal-slate);
}

.panel--light .panel__heading {
    color: var(--abyssal-slate);
}

.panel--light .panel__text {
    color: var(--mineral-gray);
}

/* === Diagonal Clip Paths === */
.panel-1 {
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
    padding-bottom: 15vh;
}

.panel-2 {
    clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
    margin-top: -8vh;
    padding-top: 12vh;
    padding-bottom: 12vh;
}

.panel-3 {
    clip-path: polygon(0 0, 100% 10%, 100% 100%, 0 88%);
    margin-top: -10vh;
    padding-top: 14vh;
    padding-bottom: 14vh;
}

.panel-4 {
    clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
    margin-top: -8vh;
    padding-top: 12vh;
    padding-bottom: 12vh;
}

.panel-5 {
    clip-path: polygon(0 0, 100% 8%, 100% 100%, 0 100%);
    margin-top: -8vh;
    padding-top: 14vh;
}

/* === Diagonal Border Lines === */
.panel::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 150%;
    height: 3px;
    background: var(--glacial-blue);
    transform-origin: left;
    z-index: 3;
}

.panel-1::after {
    bottom: 14.5%;
    transform: rotate(-5.7deg);
}

.panel-2::after {
    bottom: 7.5%;
    transform: rotate(-3deg);
}

.panel-3::after {
    bottom: 11.5%;
    transform: rotate(4deg);
}

.panel-4::after {
    bottom: 5.5%;
    transform: rotate(-2.5deg);
}

.panel-5::after {
    display: none;
}

/* === Oversized Background Glyphs === */
.panel::before {
    content: attr(data-glyph);
    position: absolute;
    font-family: 'Archivo Black', sans-serif;
    font-size: 40vw;
    line-height: 1;
    top: 50%;
    right: -5%;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 1;
}

.panel--dark::before {
    color: rgba(232, 236, 240, 0.03);
}

.panel--light::before {
    color: rgba(27, 31, 36, 0.05);
}

/* === Fracture Lines SVG === */
.fracture-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.fracture-lines line {
    stroke: var(--glacial-blue);
    stroke-width: 1;
    opacity: 0.3;
}

/* === Bubble Field === */
.bubble-field {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.bubble {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(163,196,212,0.3), transparent 70%);
    border: 1px solid rgba(93,122,140,0.15);
    will-change: transform;
    animation: bubble-rise linear infinite;
    opacity: 0;
}

@keyframes bubble-rise {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    85% {
        opacity: 0.7;
    }
    100% {
        transform: translateY(-100vh) translateX(var(--wobble, 20px));
        opacity: 0;
    }
}

/* === Fade Reveal === */
.fade-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 600ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Opening Animation === */
.panel-1 {
    opacity: 0;
    animation: panel-enter 800ms cubic-bezier(0.16, 1, 0.3, 1) 400ms forwards;
}

@keyframes panel-enter {
    from {
        opacity: 0;
        clip-path: polygon(0 0, 0 0, 0 0, 0 0);
    }
    to {
        opacity: 1;
        clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
    }
}

/* === Hover States === */
a, .interactive {
    transition: color 300ms ease;
}

a:hover, .interactive:hover {
    color: var(--refraction);
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    .bubble {
        animation: none;
        opacity: 0.3;
    }

    .fade-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .panel-1 {
        opacity: 1;
        animation: none;
        clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
    }
}