:root {
    --color-navy: #1a3c61;
    --color-orange: #ff7e00;
    --color-lightblue: #9bd3e1;
    --color-white: #ffffff;
    --color-bg: #f8fbfe;
    --font-main: 'Noto Sans JP', sans-serif;
}

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

body {
    background-color: var(--color-bg);
    font-family: var(--font-main);
    color: var(--color-navy);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.cover {
    width: 100%;
    height: 100vh;
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
}

/* Background growth patterns - More prominent */
.growth-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.rising-line {
    position: absolute;
    background-color: var(--color-lightblue);
    height: 4px;
    /* Thicker */
    width: 200%;
    transform: rotate(-35deg);
    bottom: 5%;
    left: -50%;
    opacity: 0.3;
    animation: slideUp 2s ease-out forwards;
}

.rising-line:nth-child(2) {
    bottom: 15%;
    height: 2px;
    background-color: var(--color-orange);
    opacity: 0.4;
    animation-delay: 0.2s;
}

.rising-line:nth-child(3) {
    bottom: 25%;
    height: 6px;
    background-color: var(--color-lightblue);
    opacity: 0.2;
    animation-delay: 0.4s;
}

/* Big Stylized Arrow in background */
.growth-arrow {
    position: absolute;
    right: 2%;
    top: 10%;
    width: 500px;
    height: 500px;
    z-index: 0;
    opacity: 0.08;
    color: var(--color-navy);
    transform: rotate(-15deg);
}

header {
    z-index: 10;
    animation: fadeInDown 1s ease-out;
}

.year-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-navy);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.main-title-wrap {
    display: flex;
    align-items: center;
}

.main-title {
    font-size: 4.8rem;
    font-weight: 900;
    color: var(--color-navy);
    line-height: 1.1;
    position: relative;
}

.main-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 300px;
    height: 8px;
    background-color: var(--color-orange);
    border-radius: 4px;
}

.arrow-accent {
    width: 80px;
    height: 80px;
    margin-left: 2rem;
    color: var(--color-orange);
    transform: rotate(-10deg);
    filter: drop-shadow(4px 4px 0 var(--color-lightblue));
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 10;
    padding: 2rem 0;
}

.catch-box {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: 1.5rem 3rem;
    display: inline-block;
    font-size: 2.3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    box-shadow: 12px 12px 0 var(--color-lightblue);
    animation: fadeInLeft 1s ease-out 0.3s forwards;
    opacity: 0;
}

.sub-catch {
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--color-navy);
    margin-bottom: 3.5rem;
    letter-spacing: 0.05em;
    animation: fadeInLeft 1s ease-out 0.5s forwards;
    opacity: 0;
    padding-left: 5px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
    max-width: 1300px;
    z-index: 10;
}

.feature-item {
    background-color: #fff;
    border: 1px solid rgba(26, 60, 97, 0.1);
    border-top: 6px solid var(--color-lightblue);
    padding: 2rem 1.2rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 700;
    color: var(--color-navy);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1.1;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    position: relative;
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.feature-item:nth-child(1) {
    animation-delay: 0.6s;
}

.feature-item:nth-child(2) {
    animation-delay: 0.7s;
}

.feature-item:nth-child(3) {
    animation-delay: 0.8s;
}

.feature-item:nth-child(4) {
    animation-delay: 0.9s;
}

.feature-item:nth-child(5) {
    animation-delay: 1.0s;
}

/* Little arrow in each box */
.feature-item::after {
    content: '▲';
    position: absolute;
    bottom: 15px;
    right: 15px;
    color: var(--color-orange);
    font-size: 0.8rem;
    transform: rotate(45deg);
    opacity: 0.5;
}

.feature-item:hover {
    transform: translateY(-15px);
    border-top-color: var(--color-orange);
    box-shadow: 0 20px 40px rgba(26, 60, 97, 0.08);
}

footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    z-index: 10;
    padding-top: 2rem;
    border-top: 1px solid rgba(26, 60, 97, 0.1);
}

.logo-section {
    display: flex;
    flex-direction: column;
}

.aises-logo {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-lightblue);
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.org-tagline {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-navy);
    margin-bottom: 0.3rem;
}

.org-name-jp {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-navy);
}

/* Animations */
@keyframes slideUp {
    from {
        transform: rotate(-35deg) translateY(200px);
        opacity: 0;
    }

    to {
        transform: rotate(-35deg) translateY(0);
        opacity: 0.3;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}