/* ===================================================
   wappy2896 — Apple-Inspired Premium Design
   =================================================== */

/* --- Design Tokens --- */
:root {
    --color-bg: #fbfbfd;
    --color-bg-alt: #f5f5f7;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-text-tertiary: #acacb0;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-accent-alpha: rgba(0, 113, 227, 0.08);
    --color-accent-glow: rgba(0, 113, 227, 0.3);
    --color-hero-bg: rgba(0, 113, 227, 0.06);
    --color-border: rgba(0, 0, 0, 0.06);
    --color-border-hover: rgba(0, 0, 0, 0.1);
    --color-card-bg: #ffffff;
    --color-nav-bg: rgba(255, 255, 255, 0.72);
    --color-nav-border: rgba(0, 0, 0, 0.08);
    --color-shadow-sm: rgba(0, 0, 0, 0.08);
    --color-shadow-md: rgba(0, 0, 0, 0.08);
    --nav-height: 52px;
    --nav-height-scrolled: 44px;
    --font-primary: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --ease-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
    --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #000000;
        --color-bg-alt: #161618;
        --color-text: #f5f5f7;
        --color-text-secondary: #86868b;
        --color-text-tertiary: #525255;
        --color-accent: #2997ff;
        --color-accent-hover: #4ea8ff;
        --color-accent-alpha: rgba(41, 151, 255, 0.15);
        --color-accent-glow: rgba(41, 151, 255, 0.3);
        --color-hero-bg: rgba(41, 151, 255, 0.1);
        --color-border: rgba(255, 255, 255, 0.1);
        --color-border-hover: rgba(255, 255, 255, 0.2);
        --color-card-bg: #1c1c1e;
        --color-nav-bg: rgba(0, 0, 0, 0.72);
        --color-nav-border: rgba(255, 255, 255, 0.1);
        --color-shadow-sm: rgba(0, 0, 0, 0.4);
        --color-shadow-md: rgba(0, 0, 0, 0.6);
    }
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: auto;
    /* JS handles smooth scroll */
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow: hidden;
    /* Locked during loading */
}

body.loaded {
    overflow-x: hidden;
    overflow-y: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ===================================================
   LOADING SCREEN
   =================================================== */
#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: linear-gradient(145deg, #0a0a0a, #1a1a2e);
    display: flex;
    justify-content: center;
    align-items: center;
    will-change: opacity;
    transition: opacity 0.8s var(--ease-smooth);
}

#loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

#loading-screen.hidden {
    display: none;
}

.loader-inner {
    text-align: center;
    width: 90%;
    max-width: 400px;
}

.loader-text {
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 24px;
}

.loader-bar-track {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    overflow: hidden;
}

.loader-bar-fill {
    width: 0%;
    height: 100%;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 100px;
    will-change: transform;
}

/* ===================================================
   NAVIGATION
   =================================================== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9000;
    height: var(--nav-height);
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition:
        background 0.4s var(--ease-smooth),
        backdrop-filter 0.4s var(--ease-smooth),
        -webkit-backdrop-filter 0.4s var(--ease-smooth),
        height 0.4s var(--ease-smooth),
        box-shadow 0.4s var(--ease-smooth);
}

#navbar.scrolled {
    height: var(--nav-height-scrolled);
    background: var(--color-nav-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 0.5px 0 var(--color-nav-border);
}

.nav-inner {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    color: var(--color-text);
    transition: opacity 0.3s;
}

.nav-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--color-border);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.3s;
    letter-spacing: 0.01em;
}

.nav-links a:hover {
    color: var(--color-text);
}

/* ===================================================
   HERO SECTION
   =================================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-bg);
}

.hero-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 20px;
    border: 3px solid var(--color-border);
    box-shadow: 0 4px 20px var(--color-shadow-sm);
    transition: transform 0.4s var(--ease-smooth);
}

.hero-avatar:hover {
    transform: scale(1.06);
}

.hero-bg {
    position: absolute;
    inset: -20% 0 0 0;
    background: radial-gradient(ellipse 70% 50% at 50% 40%, var(--color-hero-bg) 0%, transparent 70%);
    will-change: transform;
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
    will-change: transform;
    padding: 0 24px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.05;
    color: var(--color-text);
    margin-bottom: 10px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    letter-spacing: 0.04em;
}

.hero-cta {
    display: inline-block;
    padding: 14px 32px;
    background: var(--color-accent);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 980px;
    transition:
        background 0.3s var(--ease-smooth),
        transform 0.3s var(--ease-smooth),
        box-shadow 0.3s var(--ease-smooth);
    letter-spacing: 0.01em;
}

.hero-cta:hover {
    background: var(--color-accent-hover);
    transform: scale(1.04);
    box-shadow: 0 4px 20px var(--color-accent-glow);
}

/* ===================================================
   SECTIONS (shared)
   =================================================== */
.section {
    padding: 60px 24px;
}

.section-inner {
    max-width: 980px;
    margin: 0 auto;
    text-align: center;
}

.section-heading {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 36px;
    color: var(--color-text);
}

/* --- Fade-in Animation (Observer-driven) --- */
.fade-in-element {
    opacity: 0;
    transform: translateY(40px);
    will-change: transform, opacity;
    transition:
        opacity 0.9s var(--ease-out),
        transform 0.9s var(--ease-out);
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================
   STATS (Subscriber Count)
   =================================================== */
.stats-section {
    background-color: var(--color-bg-alt);
}

.stats-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.stats-number {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--color-text);
    margin-bottom: 16px;
    font-variant-numeric: tabular-nums;
}

.stats-sub {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-tertiary);
}

/* ===================================================
   CONTENT CARDS
   =================================================== */
.content-section {
    background-color: var(--color-bg);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 980px;
    margin: 0 auto;
}

.card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 32px 24px;
    text-align: center;
    transition:
        transform 0.4s var(--ease-smooth),
        box-shadow 0.4s var(--ease-smooth),
        border-color 0.4s var(--ease-smooth);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
            rgba(0, 113, 227, 0.05),
            transparent 40%);
    opacity: 0;
    transition: opacity 0.5s var(--ease-smooth);
    pointer-events: none;
    z-index: 0;
}

@media (prefers-color-scheme: dark) {
    .card::before {
        background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
                rgba(255, 255, 255, 0.06),
                transparent 40%);
    }
}

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

.card>* {
    position: relative;
    z-index: 1;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px var(--color-shadow-md);
    border-color: var(--color-border-hover);
}

.card-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 14px;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-alpha);
    border-radius: 12px;
    padding: 8px;
}

.card-icon svg {
    width: 32px;
    height: 32px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.card-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    line-height: 1.5;
}

/* ===================================================
   FOOTER
   =================================================== */
.footer {
    padding: 40px 24px;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    max-width: 980px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    margin-bottom: 16px;
}

.footer-links a {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-divider {
    margin: 0 16px;
    color: var(--color-text-tertiary);
    font-weight: 300;
}

.footer-contact {
    margin-bottom: 12px;
}

.footer-contact p {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    letter-spacing: 0.01em;
}

/* ===================================================
   MAIN CONTENT (hidden during loading)
   =================================================== */
#main-content {
    opacity: 0;
    transform: translateY(30px);
    will-change: transform, opacity;
    transition:
        opacity 1s var(--ease-smooth),
        transform 1s var(--ease-smooth);
}

#main-content.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================
   EASTER EGGS & FUN INTERACTIONS
   =================================================== */
@keyframes barrelRoll {
    0% {
        transform: perspective(1000px) rotateY(0deg);
    }

    100% {
        transform: perspective(1000px) rotateY(360deg);
    }
}

@keyframes shakeParty {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    10% {
        transform: translate(-5px, -5px) rotate(-1deg);
    }

    20% {
        transform: translate(5px, 5px) rotate(1deg);
    }

    30% {
        transform: translate(-5px, 5px) rotate(0deg);
    }

    40% {
        transform: translate(5px, -5px) rotate(1deg);
    }

    50% {
        transform: translate(-5px, 0px) rotate(-1deg);
    }

    60% {
        transform: translate(5px, 0px) rotate(0deg);
    }

    70% {
        transform: translate(0px, 5px) rotate(-1deg);
    }

    80% {
        transform: translate(0px, -5px) rotate(1deg);
    }

    90% {
        transform: translate(-5px, -5px) rotate(0deg);
    }
}

@keyframes rainbowGlow {
    0% {
        filter: hue-rotate(0deg) drop-shadow(0 0 10px var(--color-accent));
    }

    100% {
        filter: hue-rotate(360deg) drop-shadow(0 0 30px var(--color-accent));
    }
}

@keyframes fallingWappy {
    0% {
        transform: translateY(-10vh) rotate(0deg);
        opacity: 1;
    }

    100% {
        transform: translateY(110vh) rotate(720deg);
        opacity: 0;
    }
}

body.easter-egg-roll {
    animation: barrelRoll 1.5s var(--ease-smooth) forwards;
}

body.easter-egg-party {
    animation: shakeParty 0.5s ease-in-out infinite;
}

body.easter-egg-party .hero-cta,
body.easter-egg-party .hero-avatar,
body.easter-egg-party .card-icon {
    animation: rainbowGlow 2s linear infinite;
}

.wappy-confetti {
    position: fixed;
    top: -50px;
    z-index: 10000;
    pointer-events: none;
    border-radius: 50%;
    animation: fallingWappy linear forwards;
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .card {
        padding: 24px 20px;
    }

    .section {
        padding: 40px 16px;
    }

    .section-heading {
        margin-bottom: 28px;
    }

    .hero-cta {
        padding: 12px 28px;
        font-size: 0.9rem;
    }

    .hero-avatar {
        width: 80px;
        height: 80px;
    }

    .nav-inner {
        padding: 0 16px;
    }

    .footer {
        padding: 32px 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.6rem;
    }

    .stats-number {
        font-size: 3rem;
    }
}