@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;600;700;800&family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

:root {
    --brand-navy: #0F172A;
    --brand-cyan: #15C1F0;
    --brand-dark: #020617;
    --brand-light: #F8FAFC;
    --sp-mb: 100px;
    --pc-mb: 160px;
}

body {
    font-family: 'Plus Jakarta Sans', 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    letter-spacing: -0.01em;
    color: #1E293B;
    background-color: #FFFFFF;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Section Spacing - Breathable */
.section-mb { margin-bottom: var(--sp-mb); }
@media (min-width: 768px) { .section-mb { margin-bottom: var(--pc-mb); } }

/* Reveal Animation Utilities */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Section Header - Text Only Modern style */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header .section-title {
    position: relative;
    display: inline-block;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--brand-navy);
    padding-bottom: 1.5rem;
    text-transform: uppercase;
}

.section-header .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--brand-cyan);
    border-radius: 2px;
}

@media (min-width: 768px) {
    .section-header .section-title {
        font-size: 2.75rem;
    }
}

/* Parallax Effect (Modern Version) */
.parallax-section {
    position: relative;
    clip-path: inset(0 0 0 0);
}

.parallax-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    background-position: center;
    background-size: cover;
    will-change: transform;
}

/* Header Dynamic Styling */
header {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(0px);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    height: 80px !important;
}

header.scrolled .text-brand-navy {
    color: var(--brand-navy) !important;
}

/* Back to Top with Progress Ring */
#page-top-progress {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #FFF;
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.15);
    z-index: 100;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

#page-top-progress:hover {
    transform: translateY(-5px);
}

svg.progress-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

svg.progress-ring circle {
    fill: transparent;
    stroke: var(--brand-cyan);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
}

/* SP Nav Styling */
#mobile-nav {
    background: var(--brand-navy);
    color: #FFF;
}

/* Image Hover Effects */
.image-zoom-container {
    overflow: hidden;
}

.image-zoom-container img {
    transition: transform 1.2s cubic-bezier(0.25, 1, 0.3, 1);
}

.image-zoom-container:hover img {
    transform: scale(1.1);
}

/* Gradient Utilities */
.gradient-text {
    background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-navy) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.gradient-icon {
    background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-navy) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.gradient-btn {
    background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-navy) 100%);
    transition: all 0.5s ease;
}

.gradient-btn:hover {
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-cyan) 100%);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(21, 193, 240, 0.4);
}