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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: #ffffff;
    color: #000000;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Container ===== */
.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 60px 20px;
}

/* ===== Header ===== */
.header {
    margin-bottom: 60px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    gap: 20px;
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
}

.profile-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-info {
    flex: 1;
}

.name {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 4px;
    color: #000000;
    letter-spacing: -0.5px;
}

.tagline {
    font-size: 16px;
    color: #666666;
    font-weight: 400;
}

.tagline a {
    color: #000000;
    text-decoration: none;
    border-bottom: 1px solid #000000;
}

.tagline a:hover {
    opacity: 0.6;
}

/* ===== Social Links ===== */
.social-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.social-links a {
    color: #000000;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.social-links a:hover {
    border-bottom-color: #000000;
}

/* ===== Main Content ===== */
.content {
    font-size: 16px;
    line-height: 1.7;
    color: #000000;
    margin-bottom: 80px;
}

.content p {
    margin-bottom: 24px;
}

.content p:last-of-type {
    margin-bottom: 0;
}

.content a {
    color: #000000;
    text-decoration: none;
    border-bottom: 1px solid #000000;
}

.content a:hover {
    opacity: 0.6;
}

/* ===== CTA Button ===== */
.cta-button {
    display: inline-block;
    padding: 10px 24px;
    background-color: #000000;
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 50px;
    transition: all 0.3s ease;
    border: 2px solid #000000;
    white-space: nowrap;
}

.cta-button:hover {
    background-color: #ffffff;
    color: #000000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid #e5e5e5;
    padding-top: 40px;
    padding-bottom: 40px;
    margin-top: 60px;
}

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

.footer-text {
    font-size: 15px;
    color: #000000;
    font-weight: 500;
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #666666;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #000000;
}

.footer-links .separator {
    color: #cccccc;
    font-size: 14px;
}

.footer-copyright {
    font-size: 13px;
    color: #999999;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .container {
        padding: 40px 20px;
    }

    .header {
        margin-bottom: 40px;
    }

    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .profile-section {
        margin-bottom: 20px;
    }

    .profile-image {
        width: 70px;
        height: 70px;
    }

    .name {
        font-size: 24px;
    }

    .tagline {
        font-size: 15px;
    }

    .social-links {
        gap: 16px;
        margin-bottom: 20px;
    }

    .content {
        font-size: 15px;
        margin-bottom: 60px;
    }

    .cta-button {
        width: 100%;
        text-align: center;
        padding: 12px 24px;
    }

    .footer {
        margin-top: 40px;
        padding-top: 30px;
        padding-bottom: 30px;
    }

    .footer-text {
        font-size: 14px;
    }

    .footer-links {
        gap: 8px;
    }

    .footer-links a {
        font-size: 13px;
    }

    .footer-copyright {
        font-size: 12px;
    }
}

/* ===== Selection ===== */
::selection {
    background-color: #000000;
    color: #ffffff;
}

::-moz-selection {
    background-color: #000000;
    color: #ffffff;
}