/* ============================================
   HHASSL.com v2 — Neomorphic Soft UI
   ============================================ */

:root {
    /* Surface & Backgrounds */
    --surface: #e8ecf0;
    --panel-raised: #edf1f5;
    --panel-inset: #d4d9e0;

    /* Shadows — derived from #2c3e50 and #ffffff */
    --shadow-base: #2c3e50;
    --shadow-highlight: #ffffff;
    --shadow-dark: rgba(44, 62, 80, 0.08);
    --shadow-dark-strong: rgba(44, 62, 80, 0.12);
    --shadow-light: rgba(255, 255, 255, 0.6);
    --shadow-light-strong: rgba(255, 255, 255, 0.7);

    /* Text */
    --text-primary: #3a4250;
    --text-secondary: #5a6270;
    --text-tertiary: #8a9bae;

    /* Accent */
    --accent: #7ea889;
    --accent-hover: #5d8a6a;
    --accent-pressed: #4a7356;
    --accent-glow: #c5dece;

    /* Stamped text */
    --text-stamped: #b8bec4;

    /* Typography */
    --font-headline: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --panel-padding: clamp(2rem, 4vw, 4rem);
    --panel-radius: 24px;
    --panel-gap: 48px;

    /* Transitions */
    --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--surface);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.8;
    color: var(--text-secondary);
    overflow-x: hidden;
}

/* ============================================
   Skeleton Loading
   ============================================ */

body.loading .panel {
    opacity: 0;
}

body.loaded .panel {
    animation: panelFadeIn 600ms var(--ease-default) forwards;
}

body.loaded .panel--hero { animation-delay: 0ms; }
body.loaded .panel--switches { animation-delay: 100ms; }
body.loaded .panel--explanation { animation-delay: 200ms; }
body.loaded .panel--details { animation-delay: 300ms; }
body.loaded .panel--footer { animation-delay: 400ms; }

@keyframes panelFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Panel Base
   ============================================ */

.panel {
    width: 70vw;
    max-width: 960px;
    margin: 0 auto;
    padding: var(--panel-padding);
    border-radius: var(--panel-radius);
    background: var(--panel-raised);
    box-shadow:
        8px 8px 16px var(--shadow-dark),
        -8px -8px 16px var(--shadow-light);
    transition: box-shadow 300ms var(--ease-default), transform 200ms var(--ease-default);
    margin-bottom: var(--panel-gap);
    opacity: 0;
}

.panel:hover {
    box-shadow:
        10px 10px 20px var(--shadow-dark),
        -10px -10px 20px var(--shadow-light);
    transform: translateY(-2px);
}

/* Breathing shadows animation */
.panel.breathing {
    animation: breathe 4s ease-in-out infinite;
}

.panel--footer.breathing {
    animation: breathe 8s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% {
        box-shadow:
            8px 8px 16px var(--shadow-dark),
            -8px -8px 16px var(--shadow-light);
    }
    50% {
        box-shadow:
            10px 10px 18px var(--shadow-dark),
            -10px -10px 18px var(--shadow-light);
    }
}

/* Inset panels */
.panel--inset {
    background: var(--panel-inset);
    box-shadow:
        inset 8px 8px 16px var(--shadow-dark),
        inset -8px -8px 16px var(--shadow-light);
}

.panel--inset:hover {
    box-shadow:
        inset 8px 8px 16px var(--shadow-dark),
        inset -8px -8px 16px var(--shadow-light);
    transform: none;
}

.panel--inset.breathing {
    animation: breatheInset 4s ease-in-out infinite;
}

@keyframes breatheInset {
    0%, 100% {
        box-shadow:
            inset 8px 8px 16px var(--shadow-dark),
            inset -8px -8px 16px var(--shadow-light);
    }
    50% {
        box-shadow:
            inset 10px 10px 18px var(--shadow-dark),
            inset -10px -10px 18px var(--shadow-light);
    }
}

/* Deep inset (footer) */
.panel--deep-inset {
    background: var(--panel-inset);
    box-shadow:
        inset 12px 12px 24px rgba(44, 62, 80, 0.12),
        inset -12px -12px 24px rgba(255, 255, 255, 0.5);
}

.panel--deep-inset:hover {
    box-shadow:
        inset 12px 12px 24px rgba(44, 62, 80, 0.12),
        inset -12px -12px 24px rgba(255, 255, 255, 0.5);
    transform: none;
}

.panel--deep-inset.breathing {
    animation: breatheDeepInset 8s ease-in-out infinite;
}

@keyframes breatheDeepInset {
    0%, 100% {
        box-shadow:
            inset 12px 12px 24px rgba(44, 62, 80, 0.12),
            inset -12px -12px 24px rgba(255, 255, 255, 0.5);
    }
    50% {
        box-shadow:
            inset 14px 14px 26px rgba(44, 62, 80, 0.14),
            inset -14px -14px 26px rgba(255, 255, 255, 0.55);
    }
}

/* ============================================
   Navigation Disc
   ============================================ */

.nav-disc {
    position: fixed;
    top: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--panel-raised);
    box-shadow:
        4px 4px 8px var(--shadow-dark),
        -4px -4px 8px var(--shadow-light);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 200ms var(--ease-default), box-shadow 200ms var(--ease-default);
}

.nav-disc:hover {
    transform: scale(1.08);
}

.nav-disc:active {
    transform: scale(0.95);
    box-shadow:
        inset 2px 2px 4px var(--shadow-dark),
        inset -2px -2px 4px var(--shadow-light);
}

.nav-disc.open {
    box-shadow:
        inset 2px 2px 4px var(--shadow-dark),
        inset -2px -2px 4px var(--shadow-light);
    z-index: 1001;
}

.nav-disc-icon {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 20px;
    transition: transform 300ms var(--ease-default);
}

.nav-disc.open .nav-disc-icon {
    transform: rotate(45deg);
}

.nav-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-tertiary);
    border-radius: 1px;
    transition: transform 300ms var(--ease-default), opacity 300ms var(--ease-default);
}

.nav-disc.open .nav-line:first-child {
    transform: translateY(4px);
}

.nav-disc.open .nav-line:last-child {
    transform: translateY(-4px);
}

/* ============================================
   Navigation Overlay
   ============================================ */

.nav-overlay {
    position: fixed;
    inset: 0;
    background: var(--surface);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms var(--ease-default);
}

.nav-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.nav-link {
    display: block;
    padding: 20px 48px;
    border-radius: 16px;
    background: var(--panel-raised);
    box-shadow:
        6px 6px 12px var(--shadow-dark),
        -6px -6px 12px var(--shadow-light);
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: box-shadow 200ms var(--ease-default), transform 200ms var(--ease-default), color 200ms var(--ease-default);
}

.nav-link:hover {
    transform: translateY(-2px);
    box-shadow:
        8px 8px 16px var(--shadow-dark),
        -8px -8px 16px var(--shadow-light);
}

.nav-link:active {
    transform: translateY(0);
    box-shadow:
        inset 4px 4px 8px var(--shadow-dark),
        inset -4px -4px 8px var(--shadow-light);
}

.nav-link.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

/* ============================================
   Panel 1: The Surface (Hero)
   ============================================ */

.panel--hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: var(--panel-gap);
    box-shadow:
        12px 12px 24px var(--shadow-dark),
        -12px -12px 24px var(--shadow-light);
}

.panel--hero:hover {
    box-shadow:
        14px 14px 28px var(--shadow-dark),
        -14px -14px 28px var(--shadow-light);
}

.panel--hero.breathing {
    animation: breatheHero 4s ease-in-out infinite;
}

@keyframes breatheHero {
    0%, 100% {
        box-shadow:
            12px 12px 24px var(--shadow-dark),
            -12px -12px 24px var(--shadow-light);
    }
    50% {
        box-shadow:
            14px 14px 26px var(--shadow-dark),
            -14px -14px 26px var(--shadow-light);
    }
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-family: var(--font-headline);
    font-weight: 800;
    font-size: clamp(3rem, 7vw, 7rem);
    letter-spacing: -0.02em;
    color: var(--surface);
    text-shadow:
        2px 2px 4px rgba(0, 0, 0, 0.12),
        -1px -1px 2px rgba(255, 255, 255, 0.5);
    user-select: none;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(1rem, 1.5vw, 1.3rem);
    color: var(--text-tertiary);
    margin-top: 1.5rem;
    opacity: 0;
    transition: opacity 800ms var(--ease-default);
}

.hero-subtitle.visible {
    opacity: 1;
}

/* ============================================
   Concentric Rings Divider
   ============================================ */

.rings-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 80px;
    margin-bottom: var(--panel-gap);
}

.ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--panel-inset);
}

.ring--1 {
    width: 60px;
    height: 60px;
}

.ring--2 {
    width: 40px;
    height: 40px;
}

.ring--3 {
    width: 20px;
    height: 20px;
}

/* ============================================
   Panel 2: The Switches
   ============================================ */

.panel--switches {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 600ms var(--ease-default), transform 200ms var(--ease-default);
}

.panel--switches.relaxed {
    box-shadow:
        5px 5px 11px var(--shadow-dark),
        -5px -5px 11px var(--shadow-light);
}

.toggles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.toggle-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.toggle-label {
    font-family: var(--font-headline);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

/* Soft Toggle Switch */
.soft-toggle {
    width: 56px;
    height: 28px;
    border-radius: 14px;
    background: var(--panel-inset);
    box-shadow:
        inset 3px 3px 6px var(--shadow-dark),
        inset -3px -3px 6px var(--shadow-light);
    position: relative;
    cursor: pointer;
    transition: background 300ms var(--ease-default), box-shadow 300ms var(--ease-default);
}

.soft-toggle.active {
    background: var(--accent);
    box-shadow:
        inset 3px 3px 6px rgba(44, 62, 80, 0.12),
        inset -3px -3px 6px rgba(255, 255, 255, 0.3);
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--panel-raised);
    box-shadow:
        2px 2px 4px var(--shadow-dark),
        -2px -2px 4px var(--shadow-light);
    transition: transform 300ms var(--ease-default);
}

.soft-toggle.active .toggle-thumb {
    transform: translateX(28px);
}

/* ============================================
   Panel 3: The Explanation
   ============================================ */

.panel--explanation {
    min-height: auto;
}

.explanation-columns {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
}

.explanation-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.explanation-text p:last-child {
    margin-bottom: 0;
}

.explanation-knobs {
    display: flex;
    flex-direction: column;
    gap: 32px;
    align-items: center;
}

.knob-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

/* Circular Knob */
.circular-knob {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--panel-raised);
    box-shadow:
        4px 4px 8px var(--shadow-dark),
        -4px -4px 8px var(--shadow-light);
    position: relative;
    cursor: default;
    transition: transform 200ms var(--ease-default);
}

.circular-knob:hover {
    animation: knobWiggle 200ms ease-in-out;
}

@keyframes knobWiggle {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(5deg); }
    75% { transform: rotate(-5deg); }
}

.knob-indicator {
    position: absolute;
    top: 6px;
    left: 50%;
    width: 2px;
    height: 16px;
    background: var(--accent);
    border-radius: 1px;
    transform: translateX(-50%);
}

.knob-label {
    font-family: var(--font-headline);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.knob-value {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--accent);
}

/* Divider & Pull Quote */
.explanation-divider {
    width: 100%;
    height: 1px;
    background: var(--panel-inset);
    margin: clamp(2rem, 3vw, 3rem) 0;
}

.pull-quote {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary);
    text-align: center;
    letter-spacing: -0.02em;
    border: none;
}

/* ============================================
   Panel 4: The Details
   ============================================ */

.panel--details {
    padding: clamp(2rem, 4vw, 4rem);
}

.detail-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.detail-card {
    padding: clamp(1.5rem, 3vw, 2.5rem);
    border-radius: 16px;
    background: var(--panel-raised);
    box-shadow:
        6px 6px 12px var(--shadow-dark),
        -6px -6px 12px var(--shadow-light);
    transition: box-shadow 200ms var(--ease-default), transform 200ms var(--ease-default);
}

.detail-card:hover {
    box-shadow:
        8px 8px 16px var(--shadow-dark),
        -8px -8px 16px var(--shadow-light);
    transform: translateY(-2px);
}

.detail-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 16px;
}

.detail-icon--circle {
    border-radius: 50%;
    background: var(--accent);
}

.detail-icon--square {
    border-radius: 6px;
    background: var(--accent);
}

.detail-icon--triangle {
    width: 0;
    height: 0;
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    border-bottom: 32px solid var(--accent);
    background: transparent;
}

.detail-title {
    font-family: var(--font-headline);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.detail-text {
    color: var(--text-secondary);
    font-size: clamp(0.9rem, 1vw, 1rem);
    line-height: 1.7;
}

/* ============================================
   Panel 5: The Settling (Footer)
   ============================================ */

.panel--footer {
    margin-bottom: clamp(2rem, 4vw, 4rem);
    text-align: center;
    padding: clamp(3rem, 5vw, 5rem) var(--panel-padding);
}

.footer-title {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--panel-inset);
    text-shadow:
        2px 2px 4px rgba(0, 0, 0, 0.1),
        -1px -1px 2px rgba(255, 255, 255, 0.4);
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.footer-info {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.footer-info p {
    margin-bottom: 0.5rem;
}

.footer-contact {
    color: var(--accent);
    text-decoration: none;
}

/* ============================================
   Mobile Responsive
   ============================================ */

@media (max-width: 768px) {
    .panel {
        width: 95vw;
        box-shadow:
            5px 5px 10px var(--shadow-dark),
            -5px -5px 10px rgba(255, 255, 255, 0.5);
    }

    .panel--hero {
        box-shadow:
            7px 7px 14px var(--shadow-dark),
            -7px -7px 14px rgba(255, 255, 255, 0.5);
    }

    .panel--inset,
    .panel--deep-inset {
        box-shadow:
            inset 5px 5px 10px var(--shadow-dark),
            inset -5px -5px 10px rgba(255, 255, 255, 0.5);
    }

    .toggles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: clamp(1.5rem, 3vw, 2.5rem);
    }

    .explanation-columns {
        grid-template-columns: 1fr;
    }

    .explanation-knobs {
        flex-direction: row;
        justify-content: center;
        gap: clamp(1.5rem, 4vw, 3rem);
    }

    .nav-link {
        padding: 16px 32px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .toggles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .explanation-knobs {
        flex-wrap: wrap;
    }
}